The microstructure and mechanical properties of two different isotactic polypropylene mandrel pipes after their service，ICAFPM 2011先进纤维与聚合物材料国际学术会议（2011.8.15~17，上海）-中国聚合物网,论文下载

The microstructure and mechanical properties of two different isotactic polypropylene mandrel pipes after their service

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isotactic polypropylene pipe mechanical properties microstructure fatigue

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1157K

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分子表征

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ICAFPM 2011先进纤维与聚合物材料国际学术会议（2011.8.15~17，上海）

简介：

Theappearance,microstructureandpropertiesoftwodifferentisotacticpolypropylenemandrelpipes,Ziegler-Natta(ZNPP)andmetallocene(MAOPP)types,aftertheirservicewereinvestigated.Althoughtheinnerwallturnedwhiteandthedegreeofcrystallizationofthewallwasslightlyincreased,thecrystalmodificationstillmaintainedthealphaformforMAOPPpipes.Thedegreeofcrystallizationoftheinnerwallgainedmuchandthealphamodificationofthewallwaschangedintobetaonetosomeextent,butnoappearancechangehappenedatallforZNPPpipes.Theaccelerationfatigueresultsindicatedthat,atinitialfatigueperiod,bothcrystallizationandtensilestrengthofZNPPbecamelargepossiblytheresidualstressformedduringprocessingwaseliminated.Conclusively,thechangesofmicrostructureandappearancedon’tnecessarilysignposttheaggregationofthepipeproperties,andthelifeexpectanceshouldbeestimatedbasedonscientificdatanotonappearancevariation.

作者：

LIU Zhonghua, NI Qinglan, WANG Fei, WANG Yaorong, ZHU Xinsheng

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2011-09-27 14:26:00

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