| 茂金属线形低密度聚乙烯／普通聚乙烯共混体系非等温结晶行为的研究 |
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| 引用本文： | 胡学锋 高俊刚 李书润 李志庭. 茂金属线形低密度聚乙烯／普通聚乙烯共混体系非等温结晶行为的研究[J]. 中国塑料, 2004, 18(10): 32-37 |
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| 作者姓名： | 胡学锋 高俊刚 李书润 李志庭 |
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| 作者单位： | 河北大学化学与环境科学学院 河北保定071002(胡学锋，高俊刚，李书润)，河北大学化学与环境科学学院 河北保定071002(李志庭) |
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| 基金项目： | 河北省自然科学基金 ( 2 0 10 68)，河北省教育厅科研基金( 2 0 0 0 10 5 )资助 |
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| 摘 要： | 用DSC和X-射线衍射法研究了茂金属线形低密度聚乙烯(m-PE-LLD)与高密度聚乙烯(PE-HD)、低密度聚乙烯(PE-LD)、线形低密度聚乙烯(PE-LLD)共混时PE-HD、PE-LD、PE-LLD不同加入量对m-PE-LLD非等温结晶行为和结晶动力学的影响。研究结果表明：PE-HD与m-PE-LLD共混使样品结晶峰变窄，结晶度和结晶速率有所提高，说明两者有较好的相容性与共结晶行为；PE-LD的加入使共混物结晶峰变宽，说明PE-LD与m-PE-LLD共结晶行为较差，存在部分相分离，但在PE-LD含为20％时有最大结晶度，结晶速率有所提高；PE-LLD的加入对m-PE-LLD非等温结晶和动力学影响较小。X-射线衍射结果证明共混使球晶粒径减小。
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| 关 键 词： | 茂金属线形低密度聚乙烯 非等温结晶 相容性 |
Nonisothermal Crystallization Behavior of Metallocene Linear Low Density Polyethylene/Conventional Polyethylene Blending Systems |
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| HU Xue-feng,GAO Jun-gang,LI Shu-run,LI Zhi-ting. Nonisothermal Crystallization Behavior of Metallocene Linear Low Density Polyethylene/Conventional Polyethylene Blending Systems[J]. China Plastics, 2004, 18(10): 32-37 |
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| Authors: | HU Xue-feng GAO Jun-gang LI Shu-run LI Zhi-ting |
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| Abstract: | The nonisothermal crystallization behavior of blends of metallocene linear low density polyethylene (m-PE-LLD) with PE-HD,PE-LD and PE-LLD were studied by differential scanning calorimeter (DSC) and X-ray diffraction.The theory of Ozawa,Jeziorny and method of Mo Zhi-shen for nonisothermal crystallization were used to analyze the differential scanning calorimetric data.As a result of these studies,the blends of m-PE-LLD with PE-HD have well crystallizability and more miscibility and can cocrystallize.There are part liquid-liquid phase separation for the blends of m-PE-LLD with PE-LD,and have a most co-crystallization at 20 % PE-LD.The blends of m-PE-LLD with PE-LLD have similar crystal structure and have no more effect on crystallization. |
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| Keywords: | metallocene linear low density polyethylene nonisothermal crystallization compatibility |
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