| 由聚丙烯熔体的流变行为测定其分子量分布 |
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| 引用本文： | 陈稀,陈国康.由聚丙烯熔体的流变行为测定其分子量分布[J].合成纤维工业,1994,17(4):10-15. |
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| 作者姓名： | 陈稀 陈国康 |
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| 作者单位： | 中国纺织大学高材系，上海石化股份有限公司 |
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| 摘 要： | 研究了Ｚ３０Ｓ等４种聚丙烯（ＰＰ）切片的流变行为，分别用毛细管流变仪和平板流变仪进行稳态和动态流变特性的测试，测得流变曲线、动态模量及复数粘度。讨论了温度、剪切速率、角频率、分子量（ＭＷ）和分子量分布（ＭＷＤ）对流变行为的影响。研究表明，从稳态和动态测得的流变曲线求得的４种ＰＰ切片的分子量及其分布指数是同落球粘度法与熔融指数法相结合求得的分子量分布指数相吻合的。
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| 关 键 词： | 等规聚丙烯，分子量分布，流变行为，动态模量，复数粘度，零切粘度 |
DETERMINING MOLECULAR WEIGHT DISTRIBUTION OF PP FROM ITS MELT RHEOLOGICAL BEHAVIOR |
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| Chen Xi,Huang Haibo and Ni Yiping,Chen Guokang.DETERMINING MOLECULAR WEIGHT DISTRIBUTION OF PP FROM ITS MELT RHEOLOGICAL BEHAVIOR[J].China Synthetic Fiber Industry,1994,17(4):10-15. |
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| Authors: | Chen Xi Huang Haibo and Ni Yiping Chen Guokang |
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| Abstract: | In this paper the rheological behavior of four kinds of PP(Z30S etc. )was investigated. Both static and dynam-ic measurment were carried out with capillary and parallel plate rheometer respectively. FLow curves,dynam-ic modulus and comple viscosities were obtained.The effects of temperature,shearing rate,angular frequency,molecular weight and molecular weight distribution on the rheological behavior were discussed.The resultsshowed that the molecular weight and its distribution of the polymer inferred from flow curves of both staticand dynamic measurement are identical with those obtained by the combining method of falling sphere vis-cometer and melt indexer. |
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| Keywords: | isotactic polypropylene molecular weight distribution rheological behavior dynamic modu-lus complex viscosity zero shear viscosity |
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