摘要
以二-(4-羟基丁基)聚二甲基硅氧烷(HB-PDMS)和聚乙二醇为(PEG)软段,2,4-甲苯二异氰酸酯(TDI)为硬段,合成了一系列不同硬段含量的聚氨酯/脲(PU)和有机硅改性聚氨酯/脲(SiPU)。通过FT-IR、DSC、TG及吸水率表征了PU和SiPU的结构及性能。结果表明,相对于PU,SiPU的耐水性随SiPU中HB-PDMS含量的增大而逐渐增强,聚硅氧烷的引入虽然降低了PU的初始热降解温度,但其在高温区的热稳定性增强。
Based on dihydroxybutyldimethylsilyl capped polydimethylsiloxane （HB -PDMS） and polyethylene glycol （PEG） as the soft segment and 2,4 -toluenediisocyanate （TDI） as the hard segment, a series of polyurethane/urea （PU） and silicone - modified polyurethane/urea （SiPU） with various hard segment content were prepared. The structures and properties of these polymers were characterized by Fourier Transfer infrared spectroscopy （ FT - IR） , differential scanning calorimetry （DSC） , thermal gravimetric analysis （TG） and water absorption. The result showed that the water resistance of SiPU as well as the thermal stability was gradually increased with increasing the HB -PDMS content.
出处
《有机硅材料》
CAS
2012年第2期75-78,共4页
Silicone Material
关键词
二-(4-羟基丁基)聚二甲基硅氧烷
聚氨酯/脲
改性
双组分
dihydroxybutyldimethylsilyl capped polydimethylsiloxane, polyurethane/urea, modified, two- component
