Facilely Synthesizing Ethynyl Terminated All-Aromatic Liquid Crystalline Poly(esterimide)s with Good Processability and Thermal Resistance under Medium-Low Temperature via Direct Esterification

被引：15

作者：

Huang, Ting ^{[1
]}

Guan, Qingbao ^{[1
]}

Yuan, Li ^{[1
]}

Liang, Guozheng ^{[1
]}

Gu, Aijuan ^{[1
]}

机构：

[1] Soochow Univ, Coll Chem Chem Engn & Mat Sci, Jiangsu Key Lab Adv Funct Polymer Design & Applic, Dept Mat Sci & Engn,State & Local Joint Engn Lab, 199 Ren Ai Rd,Suzhou Ind Pk, Suzhou 215123, Peoples R China

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2018年 / 57卷 / 21期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

CAPPED IMIDE OLIGOMERS; HIGH T-G; RESINS; POLYIMIDES; POLYESTERS; BEHAVIOR; ACID; POLY(ESTER-IMIDE)S; CHEMISTRY; MONOMER;

D O I：

10.1021/acs.iecr.8b00301

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Developing a facile strategy to synthesize thermosetting all-aromatic liquid crystalline poly(esterimide)s (LCPEIs) at medium-low temperature and endowing LCPEIs with good processability and high thermal resistance are still two big challenges. Herein, a new solution polymerization based on direct esterification under 120 degrees C is developed, overcoming bottlenecks of traditional melt and solution polymerizations. Besides, two new reactive LCPEIs (LCPEI-1 and LCPEI-2) terminated with 3-ethynylaniline (3-EA) were synthesized, and their structures and properties were compared with two control samples without 3-EA end groups. LCPEI-1 and LCPEI-2 not only show good processing characteristics including low melting temperature (T-m = 200 degrees C), low melting viscosity, and good solubility in solvent, but their cured samples also have high glass transition temperature (T-g = 192 and 225 degrees C) and high storage modulus, whereas control samples, even treated with similar thermal history as curing procedure for LCPEI-1 and LCPEI-2, have poor performances. Cured-LCPEI-2 exhibits the highest T-g among polyesters with low T-m values (<250 degrees C) reported. The mechanism behind outstanding performances of LCPEIs is discussed.

引用

页码：7090 / 7098

页数：9