| Kinetics of Nonisothermal and Isothermal Crystallization of Metallocene Polyethylene |
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| 引用本文： | Yu Ying LI, Ji Jun ZENG, Jia Song HE(State Key Laboratory of Engineering Plastics,Institute of Chemistry,The Chinese Academy of Sciences. Beijing 100080). Kinetics of Nonisothermal and Isothermal Crystallization of Metallocene Polyethylene[J]. 中国化学快报, 1999, 0(2) |
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| 作者姓名： | Yu Ying LI Ji Jun ZENG Jia Song HE(State Key Laboratory of Engineering Plastics Institute of Chemistry The Chinese Academy of Sciences. Beijing 100080) |
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| 作者单位： | State Key Laboratory of Engineering Plastics，Institute of Chemistry，The Chinese Academy of Sciences. Beijing 100080 |
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| 摘 要： | Thedevelopmentofmetallocenecatalystsundoubtedlyrepresentsarevolutioninthepolyolefinbusiness.MetallocenePE(MPE)coverspolyethyleneswhichareproducedbymetallocenecatalysttechnology.EXXONChemicalCo.developedanewmeta-llocenepolyethylene-EXCEED'"PEin1991.Nowmoreandmoreeffortsarespentonthisinterestingproject.Uniformmolecularstructureandnarrowmoleculardistribution,makeMPEbetterphysicalpropertiesthanthoseofconventionalPE,andalsomakeitlowmeltstrengthandbadprocessability.Sotherelationshipbetween…
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Kinetics of Nonisothermal and Isothermal Crystallization of Metallocene Polyethylene |
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| Yu Ying LI, Ji Jun ZENG, Jia Song HE. Kinetics of Nonisothermal and Isothermal Crystallization of Metallocene Polyethylene[J]. Chinese Chemical Letters, 1999, 0(2) |
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| Authors: | Yu Ying LI Ji Jun ZENG Jia Song HE |
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| Abstract: | The kinetics of nonisothermal and isothermal crystallization of metallocene catalyzedand conventional polyethylenes has been studied by differential scanning calorimetry. UsingAvrami equation, Ozawa theory and Mo Zhishen method, the experimental data have beenanalyzed. It is shown that metallocene polyethylene possesses a higher rate of crystallization due toa higher stereoregularity of its molecular chains. Moreover, they have different nonisothermalcrystallization mechanisms and identical isothermal crystallization mechanisms. |
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| Keywords: | Metallocene polyethylene nonisothermal crystallization isothermal crystallization |
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