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.
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)
出处
《合成技术及应用》
CAS
2024年第2期10-15,共6页
Synthetic Technology & Application
关键词
PEFT
2
5-呋喃二甲酸二甲酯
预结晶
结晶度
PEFT co-polyester
dimethyl 2,5-furandicarboxylic acid
pre-crystallization
crystallinity
作者简介
郭颖(1995-),女,江苏高邮人,硕士研究生,助理工程师,主要从事PET聚酯的改性研究。
