ARGET-ATRP合成双亲性嵌段共聚物及对二氧化钛分散效率的影响

杨月锋; 任强; 李坚; 俞强; 亓云霞

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ARGET-ATRP合成双亲性嵌段共聚物及对二氧化钛分散效率的影响

更新时间：2025-12-10

- ARGET-ATRP合成双亲性嵌段共聚物及对二氧化钛分散效率的影响
- CIESC Journal Issue 6, Pages: 1756-1762(2011)
- 作者机构：
  
  常州大学材料科学与工程学院
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- Online First：05 June 2011，
  
  Published：05 June 2011
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杨月锋, 任强, 李坚, et al. ARGET-ATRP合成双亲性嵌段共聚物及对二氧化钛分散效率的影响[J]. CIESC Journal, 2011, (6): 1756-1762.
DOI：

杨月锋, 任强, 李坚, et al. ARGET-ATRP合成双亲性嵌段共聚物及对二氧化钛分散效率的影响[J]. CIESC Journal, 2011, (6): 1756-1762. DOI：

摘要

以CuBr2（相对于单体物质的量的0.02%或0.01%）和还原剂、配体混合物为催化体系进行甲基丙烯酸2(N

N-二甲氨基)乙酯（DMAEMA）的电子转移再生催化剂原子转移自由基聚合（ARGET-ATRP），研究了溶剂、配体和还原剂种类对聚合的影响，得到分子量分布较窄的（PDI=1.56）聚甲基丙烯酸2(N

N-二甲氨基)乙酯（PDMAEMA-Br）。以PDMAEMA-Br为引发剂引发丙烯酸丁酯进行“一步法”ARGET-ATRP聚合，得到分子量分布很窄的（PDI=1.4）双亲性嵌段共聚物（PDMAEMA-bPBA)。核磁共振氢谱（1H NMR）测得共聚物组成与GPC测试结果相近。差示扫描量热分析（DSC）测试表明嵌段共聚物在-40.1℃和123.5℃处有两个玻璃化转变温度。该方法大大降低了铜盐催化剂的用量，降低了制备成本，使聚合产物的后处理更容易进行。所得双亲性嵌段共聚物可以作为分散剂，明显提高了二氧化钛在环氧树脂中的分散效率。

Abstract

2(Dimethylamino)ethyl methacrylate(DMAEMA)was prepared by atom transfer radical polymerization with activator regenerated by electron transfer(ARGETATRP)using mixtures of CuBr2(100 ×10-6or 200 ×10-6 of monomer mole)

reductant and ligand as catalyst.The effect of solvent

ligand and reductant on the polymerization was studied.Poly［2(dimethylamino)ethyl methacrylate］(PDMAEMABr)with polydispersity 1.56 was obtained.ATRP of butyl acrylate(BA)was performed by using PDMAEMABr as macroinitiator in “onepot” method and amphiphilic block copolymer PDMAEMA-bPBA with polydispersity of 1.4 was prepared.The composition of copolymer determined by hydrogen proton nuclear resonance(1H NMR)was similar to that calculated from gel permeation chromatography(GPC).Two glass transition temperatures of the prepared block copolymer at -40.1℃ and 123.5℃ could be detected by differential scanning calorimetry(DSC).This approach to preparing block copolymer decreased the use of catalytic cupric salt greatly and so simplified the postpolymerization treatment procedure.The dispersing efficiency of titanium dioxide in epoxy binder was enhanced greatly by using prepared PDMAEMA-bPBA as dispersant.

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