复合扩链剂对回收PET的增黏改性及其结晶动力学研究.pdf

复合扩链剂对回收PET的增黏改性及其
结晶动力学研究
刘冰2杨明山2“高保平杨金娟2
(1.北京化工大学材料科学与工程学院,北京,100029;2.北京石油化工学院材料科学与工程学院,特种弹性体
复合材料北京市重点实验室,北京,102617:3.江汇苏森帝塑业股份有限公司,江苏徐州,221212)
摘要:分别采用六亚甲基-1,6-二异氯酸酯( HMDI)和HMDI/环氧树脂复配体系作扩链剂,使用双螺杆熔融挤出工艺对
废旧聚对苯二甲酸乙二醇酯(rPET)瓶片进行扩链増黏。结果表明:HMDI单独作为扩链剂时,rPET的特性黏数从
0.467dL/g增加到0.633dLg,而 IMDI/环氧树脂复配体系作扩链剂时,rPET的特性黏数增加到了0.703dL./g这说明复
配扩链剂对rPET的扩链效果更为明显: HMDI/环氧树脂复配体系扩链后,rPET的结晶能力下降。
关键词:回收聚对苯二甲酸乙二醇酯扩链剂非等温结晶动力学
Chain-extension and Non-isothermal Crystallization Kinetics
of Recycled PET Using United Chain-extender
Liu Bing Yang Mingshan" Gao Baoping Yang Jinjuan
(1. College of Materials Science and Engineering, Beijing University of Chemical
Technology, Beiing 100029; 2. College of Materials Science and Engineering
Beijing Institute of Petrochemical Technology, Beijing Key Lab of Special
Elastomer Composites Materials, Beijing, 102617; 3. Jiangsu Sendi
Plasitics Industry Co. Itd., Xuzhou, Jiangsu, 221212)
Abstract Using HMDI and HMDI/epoxy resin system as chain-extender, the chain y
A extension of RPET bottle flakes was conducted to extend chain by twin-screw extruder. M
A The results show that the intrinsic viscosity of RPET increases from 0.467 dl/g to 0.633
A dl/g using HMDI as chain-extender. The intrinsic viscosity of RPET increases to
A 0. 703dl/g using HMDI/epoxy resin as chain-extender. Two kinds of chain-extenders are y
A both efficient for RPET, especially the latter. The crystallization performance slightly re-
duces after using HMDI/epoxy resin.
Key words: recycle; polyethylene terephthalate; chain extender; non-isothermal crystalli-
A zation kinetics
随着矿泉水瓶、饮料瓶的大量使用,聚对苯
究。由于异氯酸酯基团可与羧基及羟基反应,因
甲酸乙二醇酯(PET)瓶废弃量越来越多,废旧此异氰酸酯常用作含有端羟基和端羧基的rPET
PET(rPET)所带来的环境问题日益加重,因此回
收与再利用备受关注。由于PET在加工、使用以
及回收过程中会经历热、氧、水等降解作用,其分子
收稿日期:2013-06-14;修改稿收到目期:201401-20。
作者简介:刘冰,女,士研究生,主要研究方向为塑料加工
链断裂、相对分子质量降低,对再利用的材料性能
及其改性。E-mail; liuting213 a bipt.edu.cna。
影响很大,故人们一直致力于对其进行扩链增黏研
※通信联系人,E-mail:yangmsocl(c126.com
2014,26(3
FERN I円. ASTITS
PROCESSING AND APPLICATIONS
猊代型料加定用