聚对苯二甲酸戊二醇酯/碳酸钙复合材料力学性能研究  

Study on mechanical properties of poly(pentylene terephthalate)/calcium carbonate composites

作　　者：王忠发[1] Wang Zhongfa(Shaanxi Jintai Chlor-Alkali Chemical Co., Ltd., Yulin 718100, Shaanxi, China)

机构地区：[1]陕西金泰氯碱化工有限公司

出　　处：《橡塑技术与装备》2019年第14期39-44,共6页China Rubber/Plastics Technology and Equipment

摘　　要：将不同粒径的CaCO3粉体添加到聚对苯二甲酸戊二醇酯(PPT)聚合物中,以钛酸四正丁酯和无水乙酸锌为催化剂,采用原位聚合法制备了一系列PPT/CaCO3复合材料,实现了CaCO3粒子在聚合物中的均匀分散;对该复合材料结晶、热稳定性、流变行为等性能进行研究分析,结果表明随着CaCO3粒子尺寸的减小,复合材料的开始热降解温度和最大热降解温度显著降低,冷结晶温度(Tcc)单调降低,球晶尺寸也逐渐减小。另外探究了复合材料的储能模量(G')和损耗模量(G'')与ARES平行板流变仪扫描频率的关系。发现G'和G''不仅均随频率增加不断变大,而且均随CaCO3粒子尺寸的减小而变大,说明CaCO3粒子尺寸越小,该复合材料的弹性和黏性越好。A series of PPT/CaCO3 composites were prepared by in-situ polymerization using tetrabutyl titanate and anhydrous zinc acetate as catalysts by adding different particle sizes of CaCO3 powders into poly(pentylenediol terephthalate)(PPT) polymers. The uniform dispersion of CaCO3 particles in the polymer was realized. The crystallization, thermal stability and rheological behavior of the composite were studied and analyzed. The results showed that with the decrease of CaCO3 particle size, the initial thermal degradation temperature and maximum thermal degradation temperature of the composite decreased significantly, the cold crystallization temperature (Tcc) monotonously decreased, and the spherulite size gradually decreased. In addition, the relationship between the storage modulus (G') and loss modulus (G'') of the composites and the scanning frequency of ARES parallel plate rheometer was also explored. It was found that both G' and G'' not only increased with the increase of frequency, but also increased with the decrease of CaCO3 particle size. It showed that the smaller size of CaCO3 particles, the better the elasticity and viscosity of the composite.

关 键 词：原位聚合法 结晶性能 热稳定性 流变行为 降解温 

分 类 号：TQ326.3[化学工程—合成树脂塑料工业]