中国塑料2017，Vol.31Issue(4)：30-34,5.DOI:10.19491/j.issn.1001-9278.2017.04.006
PPET共聚酯的结构表征及其结晶和热性能研究
Study on Structural Characterization and Crystallization Property,Thermal Performance of PPET Copolyesters
马城华 1陈延明 2吴佩华 1林妍妍 1王立岩2
作者信息
- 1. 中国石油辽阳石化分公司,辽宁辽阳111003
- 2. 沈阳工业大学石油化工学院,辽宁辽阳111003
- 折叠
摘要
Abstract
A series of co-polyesters [poly (propylene-co-ethylene terephthalate),PPET] were synthesized by adding various contents of 1,2 propylene glycol (PG) through a direct esterification method.Their structures were characterized systematically and their crystallization property and thermal performance were investigated.Gel permeation chromatography analysis indicated that the PPET has a number average molecular weight of over 29000 and a molecular weight distribution of 1.9～2.1.Nuclear magnetic resonance (NMR) spectroscopic characterization suggested that the weight fraction of PG remained in macromolecular chains was lower than its feed ratio,indicating that PG was more difficult to be introduced into the macromolecular chain than EG.Differential scanning calorimetry analysis demonstrated that the crystallization capability of PPET was reduced in comparison with poly(ethylene terephthalate) (PET),and their melting point also decreased by 24 ℃ when 20 wt ％ PG was incorporated.In addition,PPET exhibited a thermal stability similar to the conventional PET polyester according to thermogravimetric analysis.关键词
1,2-丙二醇/改性共聚酯/结构/结晶/热性能Key words
1,2-propylene glycol/modified copolyester/structure/crystallization/thermal property分类
化学化工引用本文复制引用
马城华,陈延明,吴佩华,林妍妍,王立岩..PPET共聚酯的结构表征及其结晶和热性能研究[J].中国塑料,2017,31(4):30-34,5.
