聚对苯二甲酸-2,5-呋喃二甲酸乙二醇共聚酯的结晶性能研究  

Crystallization properties of polyethylene terephthalate-2,5-furandicarboxylic acid copolyesters

作　　者：郭颖 王树霞 黄洛玮 司虎 Guo Ying;Wang Shuxia;Huang Luowei;Si Hu(Research Institute of Sinopec Yizheng Chemical Fibre Co.,Ltd.,Yizheng Jiangsu 211900,China;Jiangsu Key Laboratory of High Performance Fiber,Yizheng Jiangsu 211900,China)

机构地区：[1]中国石化仪征化纤有限责任公司研究院,江苏仪征211900 [2]江苏省高性能纤维重点实验室,江苏仪征211900

出　　处：《合成技术及应用》2024年第2期10-15,共6页Synthetic Technology & Application

摘　　要：以2,5-呋喃二甲酸二甲酯(DMF)、对苯二甲酸乙二醇酯(DMT)和乙二醇(EG)为原料,采用酯交换-熔融缩聚法制备了一系列不同DMF含量的聚对苯二甲酸-2,5-呋喃二甲酸乙二醇共聚酯(PEFT)。采用差示扫描量热仪(DSC)和X射线衍射仪(XRD)对150~180℃预结晶10~40 min的PEFT和聚2,5-呋喃二甲酸乙二醇酯(PEF)的熔点和结晶度进行分析。结果表明:PEFT和PEF在不出现黏连的情况下,都保持较快的结晶速率,预结晶温度170℃为最佳。DMF共聚单元比例不高于15%或不低于95%时,PEFT具有一定的结晶性能,当DMF共聚单元比例在15%~95%之间时,PEFT结晶困难;当DMF共聚单元比例不高于15%时,PEFT与PET晶体结构相同,当DMF共聚单元比例为95%时,PEFT与PEF晶体结构相同,共聚单体的少量引入不会改变共聚酯的晶体结构。A series of polyethylene terephthalate-2,5-furandicarboxylic acid copolymers(PEFT)with different DMF contents were prepared by ester-exchange-melt-condensation method using dimethyl 2,5-furandicarboxylic acid(DMF),ethylene glycol terephthalate(DMT)and ethylene glycol(EG)as the raw materials and antimony ethylene glycol as the catalyst.The melting points and crystallinity of the PEFT copolymers,and PEF pre-crystallized at temperatures between 150 and 180℃for 10 to 40 min were analyzed by differential scanning calorimetry(DSC)and X-ray diffraction(XRD).The results showed that PEFT and PEF were best pre-crystallized at 170℃without adhesion while maintaining a fast crystallization rate.When the DMF copolymerization ratio is lower than 15%or higher than 95%,the PEFT copolymers has certain crystalline properties.When the copolymerization ratio is between 15%~95%,the PEFT copolymers belongs to the amorphous structure and is difficult to crystallize.When the DMF copolymerization ratio is lower than 15%,the PEFT co-polyester maintains the same crystal structure as PET.When the DMF copolymerization unit ratio is higher than 95%,PEFT and PEF to maintain the same crystal structure,and the small amount of copolymerization monomers introduced won t change the crystalline structure of polyester.

关 键 词：PEFT 2 5-呋喃二甲酸二甲酯 预结晶 结晶度 

分 类 号：TQ322.4[化学工程—合成树脂塑料工业]