增黏回收PET专用扩链剂研究进展

Research Progress of PET Chain Extender for Viscosity Recovery

随着聚对苯二甲酸乙二醇酯(PET)的应用量不断扩大,对其进行回收利用已成为热门课题之一。废旧PET可以经过扩链增黏后直接再利用,可以通过与其他聚合物材料共混提高相应性能再利用,也可以降解制备对苯二甲酸及其酯类单体,还可以经进一步降解再转化为高附加值精细化学品。本文就化学扩链增黏回收PET技术从专用扩链剂角度进行了评述。

With the increasing application of polyethylene terephthalate （PET） in all fields, recycling and reuse of post PET or recycled PET（r-PET） has gradually become one of hot topics. The waste PET can be expanded and used directly after being expanded, and can be improved by blending with other polymer materials. PET can also be used for the degradation of terephthalic acid and its esters, and can be further degraded into high value-added fine chemicals. In this paper, the technology of chemical chain extended viscosity recovery PET is reviewed from the point of view of special chain extender.