Studies on the Relationships Between the Connected Ways and the Properties of Poly (ether ether ketone) Copolymers

Chem. J. Chinese Universities ›› 2003, Vol. 24 ›› Issue (9): 1691.

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Studies on the Relationships Between the Connected Ways and the Properties of Poly (ether ether ketone) Copolymers

LI Hui^1,2, ZHOU Hong-Wei¹, CHEN Chun-Hai¹, WU Zhong-Wen¹

1. Jilin University Alan G. MacDiarmid Laboratory, National [863] Plan R & D Research Center forHigh-Performance Engineering Plastics, Jilin University, Changchun 130012, China;
2. State Key Lab of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China

Received:2002-09-11 Online:2003-09-24 Published:2003-09-24

Abstract

Abstract: Anovel alternate copolymer of poly (ether ether ketone), 50% PEDEK-PETMDEK was designed and synthesized successfully by aromatic nucleophilic substitution polycondensation. The structure of the alternate copolymer was determined by ¹HNMR. The properties of the 50% alternate copolymer, 50% random copolymer, homopolymer PEDEK and PETMDEK were studied by DSC and WAXD etc.. We found that solubilities and thermal properties of 50% alternate copolymer and 50% random copolymer were quite different, the former is amorphous, and could be easily dissolved in common organic solvents,while the latter is a semi-crystalline polymer and could not be dissolved in almost any solvents except con-centrated H₂SO₄just like the homopolymer PEDEK. The properties of 50% alternate copolymer are more like those of the homopolymer PETMDEK. The glass transition temperature of the 50% alternate copolymer is higher than that of the 50% random copolymer.

Key words: Poly (ether ether ketone)s, Alternate copolymer, Random copolymer, Solubility

CLC Number:

O631

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LI Hui, ZHOU Hong-Wei, CHEN Chun-Hai, WU Zhong-Wen. Studies on the Relationships Between the Connected Ways and the Properties of Poly (ether ether ketone) Copolymers[J]. Chem. J. Chinese Universities, 2003, 24(9): 1691.

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Studies on the Relationships Between the Connected Ways and the Properties of Poly (ether ether ketone) Copolymers

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