[1]覃忠琼,周　猛,孙　燕,等.甲基丙烯酸酯原子转移自由基交联聚合与网络密度[J].常州大学学报(自然科学版),2007,(01):26-29.
　QIN Zhong - qiong,ZHOU Meng,SUN Yan,et al.Atom Transfer Radical Crosslinking Polymerization of Methacrylates and Network Density[J].Journal of Changzhou University(Natural Science Edition),2007,(01):26-29.
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甲基丙烯酸酯原子转移自由基交联聚合与网络密度()
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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:
2007年01期
页码:
26-29
栏目:
出版日期:
2007-03-25

文章信息/Info

Title:
Atom Transfer Radical Crosslinking Polymerization of Methacrylates and Network Density
作者:
覃忠琼;  周　猛;  孙　燕;  俞　强
江苏工业学院常州市高分子材料重点实验室, 江苏 常州 213164
Author(s):
QIN Zhong - qiong ;  ZHOU Meng ;  SUN Yan ;  YU Qiang
Polymer Materials Key Laboratary of Changzhou City , J iangsu Polytechnic Univer sity , Changzhou 213164 , China
关键词:
原子转移自由基聚合;  交联密度;  聚合行为
Keywords:
A TRP ;  crosslinking densities ;  polymerization behavior
分类号:
O 630 　
文献标志码:
A
摘要:
研究了甲基丙烯酸酯/ 二甲基丙烯酸酯原子转移自由基交联聚合体系中交联密度对其交联聚合行为的影响。研究发现, 交联单体用量增加导致交联网络密度增大, 过渡金属络合物的扩散受阻严重, 从而使聚合速率和双键转化率都增加; 交联体系 的凝胶点随交联单体用量增加提前出现; 交联网络中初级链分子量随转化率呈线性增长, 但是在聚合后期发生偏离, 偏离点所 对应的转化率随交联单体用量的增加而降低。说明交联密度越高, 越不利于保持原子转移自由基聚合的“活性”/ 控制能力。
Abstract:
The influence of crosslinking densities on the reaction behavior of atom transfer radical polymerization of met hacrylate/ dimet hacrylate was st udied. It was found that , with more dimet hacrylate int roduced , the crosslinking density increased , which put more rest riction to the diffusion of transition metal complex , giving rise to a faster polymerization rate and a higher vinyl group conver sion. The gel point also appeared earlier when more dimet hacrylate was used. The molecular weight of the primary chains in the network increased linearly with vinyl group conversion , but deviated from this trend at higher conver sions. The conversion corresponding to the deviation decreased with the increase of dimet hacrylate content . It was demonst rated that the higher crosslinking densities would damage the“living”/ cont rolled nature of A TRP in the network forming systems.

参考文献/References:

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[2] Yu Q , Zeng F , Zhu S P. Atom t ransfer radical polymerization of poly ( et hylene glycol ) dimet hacrylate [J] . Macromole2 cules , 2001 , 34 : 1 6121
[3] Yu Q , Zhang J Z , Cheng M L. Kinetic behavior of atom t ransfer radical polymerization of dimet hacrylates [J] . Macro2 mol Chem Phys , 2006 , 207 : 2871
[4] 张静志, 俞强1 二甲基丙烯酸聚乙二醇酯的原子转移自由基交 联聚合[J] 1 江苏工业学院学报, 2005 , 17 (3) : 71
[5] Anset h K S , Wang C M , Bowman C N. Reaction behavior and kinetic constant s for photopolymerizations of multi (met h) acrylate monomers [J] . Polymer , 1994 , 35 : 3 2431
[6] Wang J S , Matyjaszewski K. Cont rolled living radical poly2 merization - halogen atom - t ransfer radical polymerization pro2 moted by A Cu ( Ⅰ) / Cu ( Ⅱ) redox process [J] . Macromol2 ecules , 1995 , 28 : 7 9011
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备注/Memo

备注/Memo:
基金项目: 江苏省自然科学基金资助项目(BK2004034) 作者简介: 覃忠琼(1978 - ) , 女, 四川绵竹人, 硕士生; 联系人: 俞强。
更新日期/Last Update: 2007-03-25