水滑石对PET非等温结晶行为的影响  

Effect of hydrotalcite on crystallization behavior of PET

作　　者：王立志[1] 孙春燕[1] 刘伟[1] 

机构地区：[1]中国石油化工股份有限公司石油化工科学研究院,北京100083

出　　处：《合成树脂及塑料》2006年第5期20-22,共3页China Synthetic Resin and Plastics

摘　　要：研究了水滑石(HT)对聚对苯二甲酸乙二酯(PET)非等温结晶行为的影响。差示扫描量热法分析表明,以10℃／min降温时,添加HT的PET的过冷度减少10℃左右;半结晶时间也明显降低,说明PET的结晶能力增强,成核能力提高,结晶速率加快。同时,结晶热焓(ΔHmc)和熔融热焓均有所增加。当w(HT)为0．5％,以10℃／min降温时,PET的熔融结晶温度可以达到201．99℃,ΔHmc为44．75 J／g。The effect of hydrotalcite （HT） on non-isothermal crystallization capacity of poly（ethylene terephthalate） （PET） was studied. The degree of supercooling of PET filled with HT was decreased by about 10 ℃ when it was cooled at the rate of 10 ℃/min, as indicated by the analysis of differential scanning calorimetry. Meanwhile, the crystallization half-time also shortened apparently, this fact confirmed that the PET composite was endued with an increase in its crystallization capacity, a rise in its nucleating power and acceleration in its crystallization rate. At the same time, both the crystallization enthalpy （△Hmc） and fusion enthalpy was raised to certain extent. The melting crystallization temperature and △Hmc of the PET composite reached 201.99 ℃ and 44.75 J/g respectively when the mass fraction of HT was 0.5% and the cooling rate was 10 ℃/min.

关 键 词：聚对苯二甲酸乙二酯 水滑石 成核剂 结晶速率 结晶度 

分 类 号：TQ320.7[化学工程—合成树脂塑料工业]