[1]张 薇,黄文艳,李少杰,等.3-巯基己醇在苯乙烯聚合体系中的链转移反应行为[J].常州大学学报(自然科学版),2011,(03):23-27.
　ZHANG Wei,HUANG Wen-yan,LI Shao-jie,et al.Study of the Chain Transfer Reaction of 3-Mercaptohexanol in the Styrene Polymerization[J].Journal of Changzhou University(Natural Science Edition),2011,(03):23-27.
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3-巯基己醇在苯乙烯聚合体系中的链转移反应行为()
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常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:
期数:
2011年03期
页码:
23-27
栏目:
材料科学与工程
出版日期:
2011-06-30

文章信息/Info

Title:
Study of the Chain Transfer Reaction of 3-Mercaptohexanol in the Styrene Polymerization
作者:
张 薇; 黄文艳; 李少杰; 薛小强; 蒋必彪
常州大学 材料科学与工程学院,江苏 常州 213164
Author(s):
ZHANG Wei; HUANG Wen-yan; LI Shao-jie; XUE Xiao-qiang; JIANG Bi-biao
School of Materials Science and Engineering, Changzhou University, Changzhou 213164,China
关键词:
链转移常数;  温度;  3-巯基己醇
Keywords:
chain transfer constant;  temperature;  3-mercaptohexanol
分类号:
TQ 325.2
文献标志码:
A
摘要:
以偶氮二异丁腈(AIBN)为引发剂,甲苯为内标,3-巯基己醇为链转移剂进行苯乙烯(St)聚合。根据Mayo等式,求出了60 ℃,70 ℃和80 ℃下的链转移常数,分别为3.99,3.58和2.24,表明链转移常数随着温度的升高而减小。采用制备色谱分离得到了聚合初期的产物,并且由核磁共振(1H NMR)和液-质联用(LC-MS)确证了生成的小分子产物的结构。定量分析结果表明:在相同的巯基醇转化率下,相对分子质量低的产物的生成量随反应温度的升高而显著增加,以聚合物相对分子质量为基础计算得到的表观链转移常数则变小。
Abstract:
The polymerization of styrene was carried out in the presence of 3-mercaptohexanol at different temperature with AIBN as the initiator and toluene as the internal standard. The chain transfer constant of 3-mercaptohexanol under the experimental condition was obtained by the Mayo equation. It is 3.99, 3.58 and 2.24 at the polymerization temperature of 60 ℃, 70 ℃ and 80 ℃ respectively. As the temperature increased, the chain transfer constant of 3-mercaptohexanol decreased. Further research showed that: under the polymerization condition,the products with very low molecular weight wereformed from the 3-mercaptohexanol transferring to styrene radical. The dimer and trimer of these products were obtained by high performance liquid chromatography and confirmed by proton nuclear magnetic resonance(1H NMR)and liquid chromatography-mass spectrometry(LC-MS). The productivity of these products increasedsignificantly as the reaction temperature increased. Therefore, the obtained chain transfer constant is only the apparent value because of the formation of themolecules with very low molecular weight.

参考文献/References:

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备注/Memo

备注/Memo:
基金项目:国家自然科学基金资助(21174020) 作者简介:张薇(1987-),女,江苏盐城人,硕士生; 通讯联系人:蒋必彪。
更新日期/Last Update: 2011-06-30