| 嵌段共聚物PS-b-PAA的合成及其分散性能研究 |
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| 引用本文： | 刘长春,李登好.嵌段共聚物PS-b-PAA的合成及其分散性能研究[J].北京工商大学学报(自然科学版),2006,24(1):5-9. |
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| 作者姓名： | 刘长春 李登好 |
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| 作者单位： | 1. 南京工业大学,江苏,南京,210009;江苏食品职业技术学院,江苏,淮安,223003
2. 淮阴工学院,江苏,淮安,223001 |
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| 摘 要： | 以苯乙烯和丙烯酸为单体,二硫代苯甲酸苄酯为链转移剂,偶氮二异丁腈作为引发剂,采用可逆加成-断裂链转移活性自由基聚合方法合成了两亲性嵌段共聚物分散剂聚苯乙烯-b-聚丙烯酸(PS-b-PAA),探讨了影响聚合反应的主要因素,用GPC,IR,1H NMR对其结构进行了表征.结果表明,用RAFT法制得的共聚物分子量分布为1.1~1.3,聚合反应在80℃下24 h内转化率达95%.进一步的分散性能研究表明,超分散剂PS-b-PAA对S iO2粉体在水中有着较好的分散效果.
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| 关 键 词： | PS-b-PAA 超分散剂 可逆加成-断裂链转移 活性自由基聚合 |
| 文章编号： | 1671-1513（2006）01-0005-05 |
| 收稿时间： | 2005-07-01 |
| 修稿时间： | 2005年7月1日 |
SYNTHESIS AND DISPERSION OF HYPERDISPERSANT PS-b-PAA BY RAFT |
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| LIU Chang-chun,LI Deng-hao.SYNTHESIS AND DISPERSION OF HYPERDISPERSANT PS-b-PAA BY RAFT[J].Journal of Beijing Technology and Business University:Natural Science Edition,2006,24(1):5-9. |
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| Authors: | LIU Chang-chun LI Deng-hao |
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| Abstract: | A amphiphilic block copolymer dispersant poly(styrene-b-acrylic acid)(PS-bPAA)was synthesized by reversible addion-fragmentation chain transfer(RAFT) living free-radical polymerization,using styrene(St) and acrylic acid(AA) as monomer,benzyl dithiobenzoate as chain transfer agent,2,2′-azobis(2-cyanopropane)(AIBN) as initiator.The factors of effect on polymerization reaction were discussed.Its structure was characterized by GPC,IR,()~1H NMR.The results showed that the copolymer with the molecular weight distribution as narrow as 1.1～1.3 was obtained via the RAFT mechanism,the conversion of polymerization can reach 95% at 80 ℃ within 24 hours.This work,therefore,displays hyperdispersant PS-b-PAA has well dispersion effectiveness on SiO_2 suspensions in water. |
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| Keywords: | PS-b-PAA hyperdispersant reversible addion-fragmentation chain transfer living free-radical polymerization |
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