CRYSTALLIZATION AND CRYSTAL STRUCTURE FOR POLY (ARYL ETHER KETONE) CONTAINING META PHENYL LINKS

KE Yangchuan; WU Zhongwen; ZHENG Yubin; YANG Decai

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CRYSTALLIZATION AND CRYSTAL STRUCTURE FOR POLY (ARYL ETHER KETONE) CONTAINING META PHENYL LINKS

Research Article | 更新时间：2021-03-19

- CRYSTALLIZATION AND CRYSTAL STRUCTURE FOR POLY (ARYL ETHER KETONE) CONTAINING META PHENYL LINKS
- Acta Polymerica Sinica Issue 2, Pages: 177-182(1997)
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- Published：20 April 1997，
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KE Yangchuan, WU Zhongwen, ZHENG Yubin, YANG Decai. CRYSTALLIZATION AND CRYSTAL STRUCTURE FOR POLY (ARYL ETHER KETONE) CONTAINING META PHENYL LINKS. [J]. Acta Polymerica Sinica (2):177-182(1997)
DOI：

KE Yangchuan, WU Zhongwen, ZHENG Yubin, YANG Decai. CRYSTALLIZATION AND CRYSTAL STRUCTURE FOR POLY (ARYL ETHER KETONE) CONTAINING META PHENYL LINKS. [J]. Acta Polymerica Sinica (2):177-182(1997) DOI：

摘要

通过差示扫描法（ＤＳＣ）及广角Ｘ-射线衍射（ＷＡＸＤ）技术研究了含间位取代苯基聚醚酮酮（ＰＥＫｍＫ）的结晶行为与晶体结构．Ｘ-射线结果表明

从熔融态及玻璃态结晶时

ＰＥＫｍＫ只有一种晶型

其晶胞参数为：ａ＝０.７６７２ｎｍ

ｂ＝０.６１４９ｎｍ

ｃ＝１.５９９ｎｍ．ＤＳＣ结果表明

ＰＥＫｍＫ热分析曲线都出现了熔融双峰

低熔融峰（ＤＯＷｎ）热焓占总热焓４～７％

它源于初始结晶形成的同一晶型不同厚度片晶．低熔融峰在２５０℃以上结晶转化成高熔融峰（Ｉ）

ＰＥＫｍＫ平衡熔点为２９５℃.

Abstract

By means of DSC and WAXD methods

Crystallization and crystal structure of poly(aryl ether ketone)s containing meta phenyl links were studied.WAXD results showed that crystallized from both glassy and melting state

only one crystal form of PEKMK was found with unit cell parameters of a=0.767 2nm

b =0.6149nm

and c =1.599nm.DSC results from different crystallization showed that double melting peaks (lower and upper peaks)exits.Lower peak had only 4% to 7% of all heat of fusion which originated from random lamellae produced at low crystallization temperature.At high crystallization temperature

lower peak transformed into upper peak with equillinrium melting point of 295℃.

关键词

含间位取代苯基聚醚酮酮熔融双峰热分析Ｘ射线衍射

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