改性PET共聚酯的非等温结晶行为  

Non-isothermal Crystallization Behavior of Modified PET Copolyester

作　　者：姜涛[1] 王菲[1] 吴全才[2] 

机构地区：[1]沈阳工业大学石油化工学院,辽宁辽阳111003 [2]沈阳工业大学化工装备学院,辽宁辽阳111003

出　　处：《塑料》2015年第5期101-104,共4页Plastics

摘　　要：采用差示扫描量热法(DSC)研究了2-甲基-1,3-丙二醇(MPO)改性共聚酯的非等温结晶行为。研究结果表明:MPO的加入使聚对苯二甲酸乙二醇酯(PET)结晶温度降低,半结晶时间(t_(1/2))延长;采用Jeziorny法分析了此体系的非等温结晶行为,发现结晶速率常数(Z_c)随MPO的加入而减小,表明MPO的加入降低了PET的结晶能力,此改性共聚酯将在瓶材和板材方面有更为广阔的应用前景。A series of modified copolyesters were synthesized with 2-methy-1, 3-propanediol （MPO）. Non-isothermal crystallization behavior of the copolyesters were researched by differential scanning calorimetry（DSC）. The results showed that the crystallization temperature of PET with MPO decreased and half crystallization time （ t1/2 ） increased. The non-isothermal crystallization behavior of the copolyesters was studied with Jeziorny method. It was found that crystallization rate constant（ Zc ） decreased with joining MPO. It showed that the crystallization ability of PET decreased with joining MPO. So the modified copolyester would have a broader application in terms of bottles and board.

关 键 词：2-甲基-1  3-丙二醇 聚对苯二甲酸乙二醇酯 改性共聚酯 非等温结晶 差示扫描量热仪 

分 类 号：TQ323.41[化学工程—合成树脂塑料工业]