PET／SiO2纳米复合材料的非等温结晶动力学  

Nonisothermal Crystallization Dynamics for PET/ SiO_2 Nanocomposites

作　　者：贺江平[1,2] 黎华明[1] 王霞瑜[1] 赵才贤[1] 高勇[1] 

机构地区：[1]湘潭大学高分子化学研究所,湖南湘潭411105 [2]湖南女子大学,湖南长沙410004

出　　处：《高分子材料科学与工程》2009年第1期83-86,共4页Polymer Materials Science & Engineering

摘　　要：为了研究溶胶-凝胶原位聚合法合成的PET/SiO2纳米复合材料的结晶性能,用Avrami法和莫志深法对该复合材料进行了非等温结晶动力学研究。通过研究,得出以下结论:SiO2纳米粒子对基体PET具有异相成核作用,使PET的结晶温度明显升高,SiO2纳米粒子的加入使PET的结晶速率提高;SiO2粒子改变了PET基体的成核机理和生长方式;PET/SiO2纳米复合材料非等温结晶行为适合莫志深法。In order to study the crystallization properties of PET/SiO2 nanocomposites synthesized by using the in situ polymerization approach. Non-isothermal crystallization kinetics of pure PET and the PET/SiO2 nanocomposites has been carried out of with DSC techniques by Avrami and Mo. It is found that the silica nanoparticles can act as an efficient nucleating agent to facilitate PET crystallization. The crystallization temperature for the PET/SiO2 composites increases with increasing SiO2 content for a given cooling rate. Supporting evidence for the conclusion that silica nanoparticles can act as an efficient nucleating agent comes from a comparison of the crystallization temperature values of pure PET and that of the PET/SiO2 nanocomposites. The incorporation of SiO2 causes a change in the mechanism of nucleation and the crystal growth of PET crystallites, Combined Avrami and Ozawa analysis is found to be effective in describing the non-isothermal crystallization of the pure PET and PET/SiO2 composites.

关 键 词：PET 纳米复合材料 非等温结晶 动力学 

分 类 号：TB383[一般工业技术—材料科学与工程]