新型共聚酯PETG的热性能及结晶性能  

Thermal behavior and crystalline property of a newly developed coplolyester PETG

作　　者：喻爱芳[1] 邹海霞[1] 李文刚[1] 黄象安[1] 

机构地区：[1]东华大学纤维材料改性国家重点实验室,上海200051

出　　处：《武汉化工学院学报》2005年第2期59-62,共4页Journal of Wuhan Institute of Chemical Technology

摘　　要：用差示扫描量热法(DSC)、和广角X衍射(WAXD)分析了新型共聚酯PETG的热性能与结晶性能.DSC的研究结果表明:PETG共聚酯的玻璃化转变温度随着CHDM含量的增加而升高;当EG/CHDM投料比为85/15、80/20和75/25时,共聚酯没有结晶峰和熔融峰,即处于一种完全无定形状态.X-衍射表明,DSC中不能结晶的样品即使经过热处理后仍不能结晶,共聚酯的结晶能力总是随着CHDM含量的增加先降低,经过一个最低点后再逐渐升高.Poly(ethylene terephthalateco1,4cylclohexylenedimethylene terephthalate)(PETG) is synthesized from dimethyl terephthalate(DMT), ethylene glycol(EG) and 1,4cyclohexanedimethanol(CHDM) by melt polycondensation. The thermal and crystalline properties of the resulted copolyesters were investigated using the differential scanning calorimetry (DSC) and the wide angle xray diffraction (WAXD). The glass transition temperature T_g increased with CHDM content increase and when the feed ratio (mol ratio) of EG/CHDM was 85/15, 80/20 or 75/25, the resulted PETG was amorphous. However, when the feed ratio of EG/CHDM was 65/35, the product was crystalline.

关 键 词：PETG 共聚酯 结晶性能 热性能 

分 类 号：O631.13[理学—高分子化学]