THE INFLUENCES OF MOLECULAR WEIGHT ON THE RHEOLOGICAL PROPERTYS OF PHENOLPHTHALEIN POLY(ETHER-ETHER-KETONE)

DI Ying-wei; LI Bin-yao; CHEN Tian-lu

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THE INFLUENCES OF MOLECULAR WEIGHT ON THE RHEOLOGICAL PROPERTYS OF PHENOLPHTHALEIN POLY(ETHER-ETHER-KETONE)

Research Article | 更新时间：2021-03-19

- THE INFLUENCES OF MOLECULAR WEIGHT ON THE RHEOLOGICAL PROPERTYS OF PHENOLPHTHALEIN POLY(ETHER-ETHER-KETONE)
- Acta Polymerica Sinica Issue 4, Pages: 398-404(1994)
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- Published：20 August 1994，
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DI Ying-wei, LI Bin-yao, CHEN Tian-lu. THE INFLUENCES OF MOLECULAR WEIGHT ON THE RHEOLOGICAL PROPERTYS OF PHENOLPHTHALEIN POLY(ETHER-ETHER-KETONE). [J]. Acta Polymerica Sinica (4):398-404(1994)
DOI：

DI Ying-wei, LI Bin-yao, CHEN Tian-lu. THE INFLUENCES OF MOLECULAR WEIGHT ON THE RHEOLOGICAL PROPERTYS OF PHENOLPHTHALEIN POLY(ETHER-ETHER-KETONE). [J]. Acta Polymerica Sinica (4):398-404(1994) DOI：

摘要

用锥权流变仪及ＤＳＣ的方法研究了５种不同分子量的酞侧基聚芳醚酮（ＰＥＫ—Ｃ）在低剪切速率区（１０－２－１０ｓ－１）的流变行为及其分子量与玻璃化转变温度（Ｔｇ）的关系．结果表明，样品的粘流活化能随分子量的增加而增大，Ｔｇ随分子量的变化是二个线性区，其交点值与所求的样品的临界分子量（Ｍｃ）值相对应．利用测得的零剪切粘度值（η０）首次求得了ＰＥＫ—Ｃ的临界分子量（Ｍｃ）值．同时也讨论了Ｍｃ与温度及η０和Ｔｇ与分子量的关系．

Abstract

heological properties at a low shear rate range(10-2-10s-1) and the glass transition temperatures for PEK-C with different moleCular weithts have been studied by using a cone/plate rheometer and DSC' The activation energy for melt flow increases with Mw The dependence of Tg on molecular weight exhibits two linear range and the value of nitersect agrees with the critical molecular weight

Mc' which is first reported for PEK-C' Mc value obtained according to η0 is about 8× 104 g/mol and the relation between Mc and temperature was dis-cussed.

关键词

聚芳醚酮熔体粘度玻璃化转变温度粘流活化能链缠结临界分子量

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