摘要
为了研究高含量刚性粒子存在下的成核作用和复合材料弱界面相互作用对聚丁二酸丁二醇酯(PBS)结晶行为的影响,采用熔融共混法制备了微晶纤维素(MCC)含量为5wt%~25wt%的PBS/MCC复合材料,利用差示扫描量热仪对PBS/MCC复合单丝的熔融行为和非等温结晶动力学进行了表征和分析,并使用由Jeziorny模型修改的Avrami方法和由Vyazovkin修改的Friedman等转化率方法研究了PBS的结晶行为和结晶机制。结晶动力学研究表明:MCC可以作为有效的成核剂显著提高PBS的结晶温度和结晶速率,促进PBS晶体的生长,且不会改变PBS的成核机制和晶体生长几何形状,但PBS/MCC弱界面相互作用会明显抑制PBS自身成核能力,PBS结晶度从34.8%降低至28.8%。本文结果对研究高含量刚性粒子存在下的弱界面相互作用对PBS结晶行为的影响具有一定的指导意义。
To study the impact of nucleation effect and weak interface interaction of composite materials in the presence of high content of rigid particles on the non-isothermal crystallization behavior of poly(butylene succinate)(PBS),PBS/MCC composites with microcrystalline cellulose(MCC)content of 5wt%-25wt%were prepared by melt blending.The melting behavior and non-isothermal crystallization kinetics of PBS were charac-terized by differential scanning calorimetry.The crystallization behavior and mechanism of PBS were analyzed using Avrami method modified by Jeziorny and Friedman's isoconversional method modified by Vyazovkin.Kinetics studies reveal that MCC can act as an efficient nucleating agent to increase the crystallization temperature and crystallization rate of PBS,and promote the growth rate of PBS crystals without changing the nucleation mechanism and crystal growth of PBS,but the weak interface interaction between PBS and MCC will significantly inhibit the nucleation ability of PBS and reduce its crystallinity which reduced from 34.8%to 28.8%.The results of this study have certain guiding significance for studying the influence of weak interface interactions on the crystal-lization behavior of PBS in the presence of high content rigid particles.
作者
张阳
廖壑
张玥
张玉梅
ZHANG Yang;LIAO He;ZHANG Yue;ZHANG Yumei(State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Materials Science and Engineering,Donghua University,Shanghai 201620,China;College of Mechanical Engineering,Donghua University,Shanghai 201620,China)
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2024年第5期2355-2363,共9页
Acta Materiae Compositae Sinica
关键词
聚丁二酸丁二醇酯
微晶纤维素
非等温结晶动力学
界面相互作用
结晶机制
poly(butylene succinate)
microcrystalline cellulose
non isothermal crystallization kinetics
interfa-cial interaction
crystallization mechanism
