Soluble, semi-crystalline PEEK analogs based on 3,5-difluorobenzophenone: Synthesis and characterization

被引：24
作者：
Fortney, Andria [1 ]
Fossum, Eric [1 ]
机构：
[1] Wright State Univ, Dept Chem, Dayton, OH 45435 USA
来源：
POLYMER | 2012年 / 53卷 / 12期
基金：
美国国家科学基金会;
关键词：
Poly(arylene ether)s; Copolymer; Crystallinity; POLY(ARYLENE ETHER KETONE)S; POLYMERS; POLYMERIZATION; TEMPERATURE; ACID;
D O I：
10.1016/j.polymer.2012.03.056
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The solubility and thermal properties of poly(ether ether ketone) (PEEK) have been modified by utilizing various ratios of the traditional electrophilic component, 4,4'-difluorobenzophenone, 1, utilized to synthesize PEEK and a comonomer, 3,5-difluorobenzophenone, 2, which is simply a geometric isomer of 1. The resulting polymers ("m-PEEK") have the same chemical composition as PEEK, allowing for accurate structure-property relationships to be determined. The thermal properties were investigated by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The ratio of monomer 1 to monomer 2 had a dramatic influence on the thermal properties and solubility characteristics of PEEK. At higher ratios, 90:10, 85:15, and 80:20, the materials were semi-crystalline and their solubility was very limited in solvents such as N-methyl-pyrrolidinone (NMP) while at lower ratios, 75:25 and 50:50, the PEEK derivatives were completely amorphous and soluble in NMP. TGA analysis indicated excellent thermal stability as most of the materials displayed 5% weight loss temperatures (T-d_5%) greater than 450 degrees C. (C) 2012 Elsevier Ltd. All rights reserved.
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收藏
页码：2327 / 2333
页数：7
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