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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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高密度聚乙烯共混调控烯烃嵌段共聚物拉伸性能
DOI: 10.3724/SP.J.1105.2013.12423, PP. 679-687
Keywords: 烯烃嵌段共聚物,高密度聚乙烯,共混物,结晶,拉伸行为
Abstract:
通过熔融共混法制备了高密度聚乙烯(HDPE)与烯烃嵌段共聚物(OBC)的共混物,研究了HDPE含量对共混体系结晶和拉伸行为的影响.实验结果表明,共混物熔体存在相分离.结晶时两组分互相影响,出现共结晶现象.共混物具有优异弹性回复与高断裂伸长率,而拉伸模量与断裂强度随着HDPE含量增加而逐渐增大.借助Slip-link橡胶弹性理论对应力应变曲线进行了分析,发现拉伸曲线可以很好的用理论模型进行拟合.将共混物的微观结构变化同模型参数进行了对比,建立了共混物结构和性能的有效关联.
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