| 新型引发剂引发苯乙烯聚合的动力学 |
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| 引用本文： | 李梁,姚会明,刘小云,庄启昕,王建龙,韩哲文.新型引发剂引发苯乙烯聚合的动力学[J].医学教育探索,2013,26(1). |
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| 作者姓名： | 李梁 姚会明 刘小云 庄启昕 王建龙 韩哲文 |
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| 作者单位： | 华东理工大学材料科学与工程学院，特种功能高分子材料及相关技术教育部重点实验室，;上海赛科石油化工有限责任公司，上海 201507;华东理工大学材料科学与工程学院，特种功能高分子材料及相关技术教育部重点实验室，;华东理工大学材料科学与工程学院，特种功能高分子材料及相关技术教育部重点实验室，;上海赛科石油化工有限责任公司，上海 201507;华东理工大学材料科学与工程学院，特种功能高分子材料及相关技术教育部重点实验室， |
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| 摘 要： | 采用过氧化2-乙基己基碳酸叔丁酯为引发剂，研究了苯乙烯自由基本体聚合的动力学过程，考察了引发剂浓度、温度、乙苯质量分数对聚合反应速率和聚苯乙烯分子量的影响。结果表明：在117 °C下，聚合速率（Rp)对引发剂浓度的反应级数为0.42，对苯乙烯浓度的反应级数为1，聚合反应的表观活化能为54.8 kJ/mol。引发剂浓度、温度、乙苯质量分数的提高导致聚苯乙烯数均分子量分别下降了约30%、20%和15%，其中引发剂浓度的影响最为显著。
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| 关 键 词： | 聚苯乙烯 引发剂 动力学 |
Kinetics of Styrene Polymerization Using a Novel Initiator |
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| LI Liang,YAO Hui ming,LIU Xiao yun,ZHUANG Qi xin,WANG Jian long and HAN Zhe wen.Kinetics of Styrene Polymerization Using a Novel Initiator[J].Researches in Medical Education,2013,26(1). |
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| Authors: | LI Liang YAO Hui ming LIU Xiao yun ZHUANG Qi xin WANG Jian long and HAN Zhe wen |
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| Institution: | 1. Key Laboratory of Special Functional Polymeric Materials and Related Technology of Ministry of
Education, School of Materials Science and Engineering, East China University of Science and Technology,
Shanghai 200237, China; 2. Shanghai SECCO Petroche;1. Key Laboratory of Special Functional Polymeric Materials and Related Technology of Ministry of
Education, School of Materials Science and Engineering, East China University of Science and Technology,
Shanghai 200237, China; 2. Shanghai SECCO Petroche;1. Key Laboratory of Special Functional Polymeric Materials and Related Technology of Ministry of
Education, School of Materials Science and Engineering, East China University of Science and Technology,
Shanghai 200237, China; 2. Shanghai SECCO Petroche;1. Key Laboratory of Special Functional Polymeric Materials and Related Technology of Ministry of
Education, School of Materials Science and Engineering, East China University of Science and Technology,
Shanghai 200237, China; 2. Shanghai SECCO Petroche;1. Key Laboratory of Special Functional Polymeric Materials and Related Technology of Ministry of
Education, School of Materials Science and Engineering, East China University of Science and Technology,
Shanghai 200237, China; 2. Shanghai SECCO Petroche;1. Key Laboratory of Special Functional Polymeric Materials and Related Technology of Ministry of
Education, School of Materials Science and Engineering, East China University of Science and Technology,
Shanghai 200237, China; 2. Shanghai SECCO Petroche |
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| Abstract: | The kinetics of free radical bulk polymerization of styrene using tert butylperoxy-2-ethylhexyl carbonate (T117) as initiator was studied. The effect of initiator concentration, temperature and ethylbenzene mass fraction on the polymerization rate and molecular weight of polystyrene were investigated. Results showed that when the temperature was 117 °C, the reaction order of initiator concentration was 0.42, the reaction apparent activation energy was 54.8 kJ/mol, and the reaction order of monomer concentration was 1. The molecular weight of PS decreased by about 30%, 20% and 15% with the increasing of the initiator concentration, temperature and ethylbenzene mass fraction, respectively. The initiator concentration was the most effective factor. |
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