聚对苯二甲酸乙二醇脂回收料扩链增黏改性研究  

Study on chain extension and viscosity modification of R-PET

作　　者：成晓燕[1] 马海燕[1,2] 秦维秀 Cheng Xiaoyan;Ma Haiyan;Qin Weixiu(College of Chemistry and Chemical Engineering,Nantong University,Nantong 226009;Nantong Newtec Monofil Ament Technology Co.,Ltd.,Nantong 226003)

机构地区：[1]南通大学化学化工学院,南通226009 [2]南通新帝克单丝科技股份有限公司,南通226003

出　　处：《化工新型材料》2021年第2期244-248,共5页New Chemical Materials

基　　金：南通市重大科技专项(XA2017004)。

摘　　要：使用六亚甲基-1,6-二异氰酸酯(HMDI)、邻苯二甲酸酐(PA)、苯乙烯-甲基丙烯酸甲酯与甲基丙烯酸缩水甘油酯共聚物(KL-E4370)、巴斯夫扩链剂Joncryl~?(ADR-4468)、环氧扩链剂、端基环氧基硅油对聚对苯二甲酸乙二醇酯回收料(R-PET)进行扩链改性。研究了单一扩链剂的种类、用量对R-PET的特性黏度、端羧基含量、熔指、结构、结晶性能的影响。结果表明:水分对特性黏度有一定的影响,R-PET经真空干燥后,特性黏度增加了6.54%~12.01%;筛选出ADR-4468为最优扩链剂,当添加质量分数为1.0%时,R-PET的特性黏度由0.48dL/g上升到0.69dL/g,端羧基含量显著降低。Hexamethylene-1,6-diisocyanate(HMDI),phthalic anhydride(PA),terminal epoxy-based silicone oil,styrene-methyl methacrylate and glycidyl methacrylate copolymer(KL-E4370),ADR-4468 and purchased chain extender were used for the chain extension modification polyethylene terephthalate recycled material(R-PET).The effects of the type and amount of chain extender on the intrinsic viscosity,terminal carboxyl group content melt index,structure and crystallization properties of R-PET were studied.The results shown that water had a certain influence on the intrinsic viscosity.After vacuum drying of R-PET,the intrinsic viscosity increased by 6.54%~12.01%.ADR-4468 was selected as the optimal chain extender.When the addition amount was 1.0%,the intrinsic viscosity of R-PET increased from 0.48 dL/g to 0.69 dL/g,and the terminal carboxyl group content decreased significantly.

关 键 词：聚对苯二甲酸乙二醇酯回收料 扩链反应 特性黏度 分子量 

分 类 号：TQ316.6[化学工程—高聚物工业]