| 由一种新型非均相聚合方法制备的聚氯乙烯的分子结构 |
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| 引用本文： | 包永忠,翁志学,黄志明. 由一种新型非均相聚合方法制备的聚氯乙烯的分子结构[J]. 高等学校化学学报, 2003, 24(9): 1727-1729 |
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| 作者姓名： | 包永忠 翁志学 黄志明 |
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| 作者单位： | 浙江大学聚合反应工程国家重点实验室, 杭州 310027 |
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| 基金项目： | 国家自然科学基金(批准号:29906009) |
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| 摘 要： | 聚氯乙烯(PVC)树脂通常采用自由基本体聚合、悬浮聚合和乳液聚合方法制备.无链转移剂时,头-尾加成和PVC大分子自由基向单体链转移反应分别是链增长和链终止的主要方式,聚合温度成为影响PVC平均分子量及分子量分布的主要因素.
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| 关 键 词： | 氯乙烯 正丁烷 端基 分子量 分子量分布 |
| 文章编号： | 0251-0790(2003)09-1727-03 |
| 收稿时间： | 2002-06-04 |
Molecular Structure of Poly(vinyl chloride) Resin Prepared by a New Heterogeneous Polymerization Process |
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| BAO Yong-Zhong,WENG Zhi-Xue,HUANG Zhi-Ming. Molecular Structure of Poly(vinyl chloride) Resin Prepared by a New Heterogeneous Polymerization Process[J]. Chemical Research In Chinese Universities, 2003, 24(9): 1727-1729 |
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| Authors: | BAO Yong-Zhong WENG Zhi-Xue HUANG Zhi-Ming |
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| Affiliation: | State Key Laboratory of Polymer Reaction Engineering, Zhejiang University, Hangzhou 310027 China |
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| Abstract: | Vinyl chloride(VC) heterogeneous polymerizations, using n-butane as the reaction medium and bis(4-tert-butylcyclohexyl) peroxydicarbonate as the initiator, were carried out to prepare poly (vinyl chloride) (PVC) resins. The chain structure, molecular weight (Mw) and molecular weight distribution (MWD) of resulting PVCresins were characterized by using 1HNMR and GPC, respectively. It was shown that more PVCchains with -CH2-CH2Cl end group were formed in the new polymerization process. The Mw of resulting PVC was lower than that of suspension PVC prepared at the same polymerization temperature and the index of MWD was greater. The Mw decreased and index of MWD increased with the increase of polymerization conversion. The variations on PVCchain structure, Mw and MWD were caused by the chain transfer reaction of PVC macroradicals to n-butane. |
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| Keywords: | Vinyl chloride n-Butane End group Molecular weight Molecular weight distribution |
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