The materialization of polybutylene succinate(PBS)belongs to the family of polyesters which are degrad-able and biodegradable,their biodegradability properties have attracted enormous interest for product development ...The materialization of polybutylene succinate(PBS)belongs to the family of polyesters which are degrad-able and biodegradable,their biodegradability properties have attracted enormous interest for product development towards different polymer-based applications.Besides its biodegradability,PBS can be derived from petroleum and biobased monomers.At the same time,the latter is the driving factor for its growing interest in bioplastics for fully green and sustainable biobased-derived polymer products.The processes and techniques presented herein,are based on the production of biobased succinic acid monomer to PBS.However,the counterpart biobased monomer 1,4-butanediol(1,4-BDO)production has not been commercially demonstrated.This review discusses the progress in state-of-the-art developments in the synthesis strategies of PBS,its copolymers,and composites with the view to improve molecular weight,thermal,and mechanical properties.It further analyzes the different strategies to synthesize modified PBS polymer composites from organic and inorganic nanofillers to enhance their chemical,thermal,stability and mechanical structural properties.Importantly,the review highlights the progress in the applications of PBS copolymers and composites with tailored structure-designed properties for specific sectors such as packaging films,biomedical and drug release,fire retardants,and agricultural products.The structure-functional performance characteristics of these developments in the PBS,copolymers,and composites are highlighted to provide baseline insights for future developments in engineering the specific applications,and structural interface PBS composites with enhanced structure-functional performance properties.展开更多
With the increasing application of electric and electronic devices in space and nuclear power stations, the polymeric insulation materials are inevitably exposed to various kinds of environments. Accordingly, it becom...With the increasing application of electric and electronic devices in space and nuclear power stations, the polymeric insulation materials are inevitably exposed to various kinds of environments. Accordingly, it becomes necessary to investigate the effects of the radiation and air pressure on insulation materials. This paper describes the effects of gamma-ray irradiation and reduced pressure on dielectric breakdown of polybutylene naphthalate (PBN) and polybutylene terephthalate (PBT) by applying a DC pulse voltage. Both PBN and PBT were irradiated in air up to 100 kGy and then up to 1 000 kGy with a dose rate of 10 kGy/h by using a60Co gamma-source. The effects of total dose and reduced pressure on the time to dielectric breakdown and discharge quantity were discussed. Obtained results show that, while increasing the total dose, the discharge quantity decreased with PBN, but increased with PBT. With decreasing the air pressure, the discharge quantity increased with PBN, but decreased with PBT. With increasing the total dose, the time to dielectric breakdown increased with PBN, but decreased with PBT. With decreasing the air pressure, the time to dielectric breakdown increased with both PBN and PBT. The experimental results suggest that the chemical structure of polybutylene polymers plays a main role in the result of radiation reaction, which is related to cross-linking and degradation reaction.展开更多
Main factors affecting the low temperature plasma initia-tion and graft modification of acrylic acid onto polybuty-lene terephthalate(PBT)meltblown nonwovens are stud-ied.The relations between hydrophilic performance ...Main factors affecting the low temperature plasma initia-tion and graft modification of acrylic acid onto polybuty-lene terephthalate(PBT)meltblown nonwovens are stud-ied.The relations between hydrophilic performance ofthe product and plasma power,treating time,andmonomer concentration are investigated.The surfaceperformances of grafted products are analyzed.It is ob-tained that hydrophilic performance of PBT nonwovens isgreatly improved due to the etching of the plasma andthe introduction of polar groups so as to meet the needsof leukocyte depleting materials.展开更多
Polybutylene succinate(PBS)fiber is a kind of synthetic fibers with excellent properties and biodegradability,which has been produced on a large scale in China.To investigate the application properties of PBS fibers,t...Polybutylene succinate(PBS)fiber is a kind of synthetic fibers with excellent properties and biodegradability,which has been produced on a large scale in China.To investigate the application properties of PBS fibers,the structure and properties were systematically studied in this paper.The microstructures and thermal properties of PBS fibers were analyzed by Fourier transform infrared(FTIR)spectroscopy,X-ray diffraction(XRD),scanning electron microscopy(SEM),thermo gravimetric(TG)and differential scanning calorimetry(DSC).The mechanical properties,chemical stability and dyeing properties of PBS fibers were also studied.The results show that PBS fibers areα-crystalline with a crystallinity of 58.56%.PBS fibers have an excellent thermal stability and the initial temperature of thermal degradation is 370℃.The tensile strength,the elongation at break,the elastic recovery rate at a fixed elongation(5%)and the moisture regain rate of PBS fibers are 29.57 cN/tex,90.94%,44.55%and 5.04%,respectively.The chemical stability is as follows:alkali resistance<acid resistance<oxidation resistance.PBS fibers have an excellent dye uptake by carrier dyeing of disperse dyes.展开更多
In this manuscript,we conveniently prepared a series of polyester-polycarbonate copolymer(PPC-P)/polybutylene adipate terephthalate(PBAT)blends that exhibit both flame-retardant properties and toughness.Piperazine pyr...In this manuscript,we conveniently prepared a series of polyester-polycarbonate copolymer(PPC-P)/polybutylene adipate terephthalate(PBAT)blends that exhibit both flame-retardant properties and toughness.Piperazine pyrophosphate(PAPP),melamine phosphate(MPP)and ZnO were used as synergistic flame retardants for PPC-P/PBAT blends.The effects of synergistic flame retardants on thermal stability,combustion behavior and flame retardancy of PPC-P/PBAT blends were investigated.The results showed that when the ratio of PAPP/MPP/ZnO was 18.4:9.2:2.4,the LOI of PPC-P/PBAT composite was 42.8%,and UL-94 reached V-0 level.The results of cone calorimetry showed that the mass loss rate(MLR),the peak value of the biggest smoke production rate(pSPR)and total smoke production(TSP)of the material decreased,and a continuously expanded carbon layer with a compact structure was formed after combustion.The carbon layer formed after surface combustion protects the material from decomposition over a long temperature range.In terms of mechanical properties,compared with the composites with only PAPP and MPP,PAPP/MPP/ZnO composites can improve the mechanical properties.After adding 2.4 wt% ZnO,the tensile strength and impact strength of the polymer increased to 34.2 MPa and 28.5 kJ/m^(2),respectively.The results showed that the use of non-toxic,environmentally friendly,halogen-free flame retardants to enhance the flame retardant properties of biodegradable polymer composites is a promising direction in the future.展开更多
Textile-based technologies are considered as potential routes for the production of 3D porous architectures for tissue engineering( TE) applications. We describe the use of two polymers,namely polybutylene succinate( ...Textile-based technologies are considered as potential routes for the production of 3D porous architectures for tissue engineering( TE) applications. We describe the use of two polymers,namely polybutylene succinate( PBS) and silk fibroin(SF) to produce fiber-based finely tuned porous architectures by weft and warp knittings. The obtained knitted constructs are described in terms of their morphology, mechanical properties,swelling ability,degradation behaviour,and cytotoxicity. Each type of polymer fibers allows for the processing of a very reproducible intra-architectural scaffold geometry,with distinct characteristics in terms of the surface physicochemistry,mechanical performance,and degradation capability,which has an impact on the resulting cell behaviour at the surface of the respective biotextiles. Preliminary cytotoxicity screening shows that both materials can support cell adhesion and proliferation. Furthermore, different surface modifications were performed( acid /alkaline treatment, UV radiation,and plasma) for modulating cell behavior. An increase of cell-material interactions were observed,indicating the important role of materials surface in the first hours of culturing. Human adipose-derived stem cells( hASCs) became an emerging possibility for regenerative medicine and tissue replacement therapies. The potential of the recently developed silk-based biotextile structures to promote hASCs adhesion,proliferation,and differentiation is also evaluated. The obtained results validate the developed constructs as viable matrices for TE applications. Given the processing efficacy and versatility of the knitting technology, and the interesting structural and surface properties of the proposed polymer fibers,it is foreseen that our developed systems can be attractive for the functional engineering of tissues such as bone,skin,ligaments or cartilage and also for develop more complex systems for further industrialization of TE products.展开更多
This paper concerns about the compatibility and morphology of the PBT/PET blended fi-bers.According to the theories of solution thermodynamics,the compatibility of this system hasbeen discussed by using the calculated...This paper concerns about the compatibility and morphology of the PBT/PET blended fi-bers.According to the theories of solution thermodynamics,the compatibility of this system hasbeen discussed by using the calculated results e.g.ΔH<sub>m</sub>,Δδandψ<sub>ab</sub>,which were presented by priorinvestigators.The theoretical predictions show that this system may behave as a compatibilitypair.Meanwhile,the compatibility of the crystalline PBT/PET blend system has been studiedwith the help of DSC,WAXD,DDV and SEM.These experiments have further proved that theamorphous region is miscible and the crystal region is not co-crystal.The morphology of thesystem basically belongs to the“interlocked”network.PBT component plays the important rolein increasing the crystallizability and crystallinity of the PBT/PET blend system.In the range ofthe smaller blending proportion,the crystal structure mainly characterizes the crystal configura-tion of the most component and the blending effects is more satisfactory.展开更多
Polybutylene terephthalate(PBT)and polyamide 6(PA6)are used as raw materials,and PBT/PA6 blend fibers with a mass ratio of 70/30 are prepared by melt blending and spinning.The effects of water bath temperature and the...Polybutylene terephthalate(PBT)and polyamide 6(PA6)are used as raw materials,and PBT/PA6 blend fibers with a mass ratio of 70/30 are prepared by melt blending and spinning.The effects of water bath temperature and the drawing rate on the properties of the fibers are studied.The thermal properties and crystallization properties of PBT/PA6 blend fibers are investigated by means of polarized light microscope(POM),differential scanning calorimetry(DSC),thermogravimetric analysis(TG)and wide-angle X-ray diffraction(WAXS).The results show that,with the increase of the water bath temperature or drawing rate,the thermal and crystallization properties of the PBT/PA6 blend fibers increase to varying degrees.When the drawing rate is constant and the water bath temperature is increasing,the melting enthalpy,crystallization enthalpy,decomposition temperature(T a,T b)and crystallinity of the blend fibers all show an increasing trend.As the water bath temperature increased,the two-dimensional wide-angle X-ray diffraction(2D-WAXS)pattern of the blend fibers gradually change from the isotropic diffraction arc with low orientation to the diffraction arc,and finally become the diffraction spot with obvious orientation.When the water bath temperature is constant and the drawing rate is increased,the change trends of the melting enthalpy,crystallization enthalpy,initial decomposition temperature,midpoint decomposition temperature and crystallinity of the blend fiber firstly increase and then decrease.展开更多
With the help of differential scanning calorimetry, cone-plate and capillary rheometry andscanning electron microscopy, a research has been conducted on rheological behavior,crystallization and morphology of poly (but...With the help of differential scanning calorimetry, cone-plate and capillary rheometry andscanning electron microscopy, a research has been conducted on rheological behavior,crystallization and morphology of poly (butylene terephthalate) (PBT) blends containing athermotropic LCP. The blend has zero entrance pressure loss, although the LCP has rather largeone. The viscosity curve of the blend lies between those of the LCP and PBT. The crystallizationof PBT is not affected by the presence of the LCP together with no indication oftransesterification between the two ingredients. LCP spheres and ellipsoids with the size of 0. 5--1. 5 μm disperse in PBT matrix uniformly, which is related to the viscosity ratio of the two components.展开更多
In this paper, poly (butylene succinate) (PBS) and poly (butylene adipate/terephthalate) (PBAT) were used as matrix, rice hull powder and wollastonite as filler, diphenyl methane diisocyanate (MDI) and silane coupling...In this paper, poly (butylene succinate) (PBS) and poly (butylene adipate/terephthalate) (PBAT) were used as matrix, rice hull powder and wollastonite as filler, diphenyl methane diisocyanate (MDI) and silane coupling agent KH550 as crosslinking agents, and a series of composites were prepared by melt blending method. The effects of different coupling agents and dosage on composites were explored. It was characterized by universal mechanical testing machine and melt flow rate meter. The results showed that with the addition of PBAT and filler, the tensile strength of the composites decreased, while the notched impact strength of the composites increased in different degrees compared with that of pure PBS. MDI is more effective than KH550 in increasing melt viscosity.展开更多
文摘The materialization of polybutylene succinate(PBS)belongs to the family of polyesters which are degrad-able and biodegradable,their biodegradability properties have attracted enormous interest for product development towards different polymer-based applications.Besides its biodegradability,PBS can be derived from petroleum and biobased monomers.At the same time,the latter is the driving factor for its growing interest in bioplastics for fully green and sustainable biobased-derived polymer products.The processes and techniques presented herein,are based on the production of biobased succinic acid monomer to PBS.However,the counterpart biobased monomer 1,4-butanediol(1,4-BDO)production has not been commercially demonstrated.This review discusses the progress in state-of-the-art developments in the synthesis strategies of PBS,its copolymers,and composites with the view to improve molecular weight,thermal,and mechanical properties.It further analyzes the different strategies to synthesize modified PBS polymer composites from organic and inorganic nanofillers to enhance their chemical,thermal,stability and mechanical structural properties.Importantly,the review highlights the progress in the applications of PBS copolymers and composites with tailored structure-designed properties for specific sectors such as packaging films,biomedical and drug release,fire retardants,and agricultural products.The structure-functional performance characteristics of these developments in the PBS,copolymers,and composites are highlighted to provide baseline insights for future developments in engineering the specific applications,and structural interface PBS composites with enhanced structure-functional performance properties.
基金Supported bythe Doctoral Foundation of Education Ministry of China (No.20040056037) .
文摘With the increasing application of electric and electronic devices in space and nuclear power stations, the polymeric insulation materials are inevitably exposed to various kinds of environments. Accordingly, it becomes necessary to investigate the effects of the radiation and air pressure on insulation materials. This paper describes the effects of gamma-ray irradiation and reduced pressure on dielectric breakdown of polybutylene naphthalate (PBN) and polybutylene terephthalate (PBT) by applying a DC pulse voltage. Both PBN and PBT were irradiated in air up to 100 kGy and then up to 1 000 kGy with a dose rate of 10 kGy/h by using a60Co gamma-source. The effects of total dose and reduced pressure on the time to dielectric breakdown and discharge quantity were discussed. Obtained results show that, while increasing the total dose, the discharge quantity decreased with PBN, but increased with PBT. With decreasing the air pressure, the discharge quantity increased with PBN, but decreased with PBT. With increasing the total dose, the time to dielectric breakdown increased with PBN, but decreased with PBT. With decreasing the air pressure, the time to dielectric breakdown increased with both PBN and PBT. The experimental results suggest that the chemical structure of polybutylene polymers plays a main role in the result of radiation reaction, which is related to cross-linking and degradation reaction.
基金Science and Technoloy Foundation of Municipal Education Commission Shanghai
文摘Main factors affecting the low temperature plasma initia-tion and graft modification of acrylic acid onto polybuty-lene terephthalate(PBT)meltblown nonwovens are stud-ied.The relations between hydrophilic performance ofthe product and plasma power,treating time,andmonomer concentration are investigated.The surfaceperformances of grafted products are analyzed.It is ob-tained that hydrophilic performance of PBT nonwovens isgreatly improved due to the etching of the plasma andthe introduction of polar groups so as to meet the needsof leukocyte depleting materials.
基金National Natural Science Foundation of China(No.1073122)。
文摘Polybutylene succinate(PBS)fiber is a kind of synthetic fibers with excellent properties and biodegradability,which has been produced on a large scale in China.To investigate the application properties of PBS fibers,the structure and properties were systematically studied in this paper.The microstructures and thermal properties of PBS fibers were analyzed by Fourier transform infrared(FTIR)spectroscopy,X-ray diffraction(XRD),scanning electron microscopy(SEM),thermo gravimetric(TG)and differential scanning calorimetry(DSC).The mechanical properties,chemical stability and dyeing properties of PBS fibers were also studied.The results show that PBS fibers areα-crystalline with a crystallinity of 58.56%.PBS fibers have an excellent thermal stability and the initial temperature of thermal degradation is 370℃.The tensile strength,the elongation at break,the elastic recovery rate at a fixed elongation(5%)and the moisture regain rate of PBS fibers are 29.57 cN/tex,90.94%,44.55%and 5.04%,respectively.The chemical stability is as follows:alkali resistance<acid resistance<oxidation resistance.PBS fibers have an excellent dye uptake by carrier dyeing of disperse dyes.
基金Financial support from National Natural Science Foundation of China(Grant No.22075298)National Key R&D Program of China(2022YFD2301204)is gratefully acknowledged.
文摘In this manuscript,we conveniently prepared a series of polyester-polycarbonate copolymer(PPC-P)/polybutylene adipate terephthalate(PBAT)blends that exhibit both flame-retardant properties and toughness.Piperazine pyrophosphate(PAPP),melamine phosphate(MPP)and ZnO were used as synergistic flame retardants for PPC-P/PBAT blends.The effects of synergistic flame retardants on thermal stability,combustion behavior and flame retardancy of PPC-P/PBAT blends were investigated.The results showed that when the ratio of PAPP/MPP/ZnO was 18.4:9.2:2.4,the LOI of PPC-P/PBAT composite was 42.8%,and UL-94 reached V-0 level.The results of cone calorimetry showed that the mass loss rate(MLR),the peak value of the biggest smoke production rate(pSPR)and total smoke production(TSP)of the material decreased,and a continuously expanded carbon layer with a compact structure was formed after combustion.The carbon layer formed after surface combustion protects the material from decomposition over a long temperature range.In terms of mechanical properties,compared with the composites with only PAPP and MPP,PAPP/MPP/ZnO composites can improve the mechanical properties.After adding 2.4 wt% ZnO,the tensile strength and impact strength of the polymer increased to 34.2 MPa and 28.5 kJ/m^(2),respectively.The results showed that the use of non-toxic,environmentally friendly,halogen-free flame retardants to enhance the flame retardant properties of biodegradable polymer composites is a promising direction in the future.
文摘Textile-based technologies are considered as potential routes for the production of 3D porous architectures for tissue engineering( TE) applications. We describe the use of two polymers,namely polybutylene succinate( PBS) and silk fibroin(SF) to produce fiber-based finely tuned porous architectures by weft and warp knittings. The obtained knitted constructs are described in terms of their morphology, mechanical properties,swelling ability,degradation behaviour,and cytotoxicity. Each type of polymer fibers allows for the processing of a very reproducible intra-architectural scaffold geometry,with distinct characteristics in terms of the surface physicochemistry,mechanical performance,and degradation capability,which has an impact on the resulting cell behaviour at the surface of the respective biotextiles. Preliminary cytotoxicity screening shows that both materials can support cell adhesion and proliferation. Furthermore, different surface modifications were performed( acid /alkaline treatment, UV radiation,and plasma) for modulating cell behavior. An increase of cell-material interactions were observed,indicating the important role of materials surface in the first hours of culturing. Human adipose-derived stem cells( hASCs) became an emerging possibility for regenerative medicine and tissue replacement therapies. The potential of the recently developed silk-based biotextile structures to promote hASCs adhesion,proliferation,and differentiation is also evaluated. The obtained results validate the developed constructs as viable matrices for TE applications. Given the processing efficacy and versatility of the knitting technology, and the interesting structural and surface properties of the proposed polymer fibers,it is foreseen that our developed systems can be attractive for the functional engineering of tissues such as bone,skin,ligaments or cartilage and also for develop more complex systems for further industrialization of TE products.
文摘This paper concerns about the compatibility and morphology of the PBT/PET blended fi-bers.According to the theories of solution thermodynamics,the compatibility of this system hasbeen discussed by using the calculated results e.g.ΔH<sub>m</sub>,Δδandψ<sub>ab</sub>,which were presented by priorinvestigators.The theoretical predictions show that this system may behave as a compatibilitypair.Meanwhile,the compatibility of the crystalline PBT/PET blend system has been studiedwith the help of DSC,WAXD,DDV and SEM.These experiments have further proved that theamorphous region is miscible and the crystal region is not co-crystal.The morphology of thesystem basically belongs to the“interlocked”network.PBT component plays the important rolein increasing the crystallizability and crystallinity of the PBT/PET blend system.In the range ofthe smaller blending proportion,the crystal structure mainly characterizes the crystal configura-tion of the most component and the blending effects is more satisfactory.
基金Beijing Natural Science Foundation and Beijing Municipal Education Commission Science and Technology Plan Key Project,China(No.KZ201510012013)Beijing Institute of Fashion Technology Graduate Research and Innovation Project in 2019,China(No.120301990122/005)
文摘Polybutylene terephthalate(PBT)and polyamide 6(PA6)are used as raw materials,and PBT/PA6 blend fibers with a mass ratio of 70/30 are prepared by melt blending and spinning.The effects of water bath temperature and the drawing rate on the properties of the fibers are studied.The thermal properties and crystallization properties of PBT/PA6 blend fibers are investigated by means of polarized light microscope(POM),differential scanning calorimetry(DSC),thermogravimetric analysis(TG)and wide-angle X-ray diffraction(WAXS).The results show that,with the increase of the water bath temperature or drawing rate,the thermal and crystallization properties of the PBT/PA6 blend fibers increase to varying degrees.When the drawing rate is constant and the water bath temperature is increasing,the melting enthalpy,crystallization enthalpy,decomposition temperature(T a,T b)and crystallinity of the blend fibers all show an increasing trend.As the water bath temperature increased,the two-dimensional wide-angle X-ray diffraction(2D-WAXS)pattern of the blend fibers gradually change from the isotropic diffraction arc with low orientation to the diffraction arc,and finally become the diffraction spot with obvious orientation.When the water bath temperature is constant and the drawing rate is increased,the change trends of the melting enthalpy,crystallization enthalpy,initial decomposition temperature,midpoint decomposition temperature and crystallinity of the blend fiber firstly increase and then decrease.
基金Supported by the National Natural Science Foundation of China
文摘With the help of differential scanning calorimetry, cone-plate and capillary rheometry andscanning electron microscopy, a research has been conducted on rheological behavior,crystallization and morphology of poly (butylene terephthalate) (PBT) blends containing athermotropic LCP. The blend has zero entrance pressure loss, although the LCP has rather largeone. The viscosity curve of the blend lies between those of the LCP and PBT. The crystallizationof PBT is not affected by the presence of the LCP together with no indication oftransesterification between the two ingredients. LCP spheres and ellipsoids with the size of 0. 5--1. 5 μm disperse in PBT matrix uniformly, which is related to the viscosity ratio of the two components.
文摘In this paper, poly (butylene succinate) (PBS) and poly (butylene adipate/terephthalate) (PBAT) were used as matrix, rice hull powder and wollastonite as filler, diphenyl methane diisocyanate (MDI) and silane coupling agent KH550 as crosslinking agents, and a series of composites were prepared by melt blending method. The effects of different coupling agents and dosage on composites were explored. It was characterized by universal mechanical testing machine and melt flow rate meter. The results showed that with the addition of PBAT and filler, the tensile strength of the composites decreased, while the notched impact strength of the composites increased in different degrees compared with that of pure PBS. MDI is more effective than KH550 in increasing melt viscosity.
