Synthesis of waterborne acrylic/clay nanocomposites by controlled surface initiation from macroinitiator modified montmorillonite

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• 作者：Matej Mi&#269 ; uš ; í ; k¹ ; Audrey Bonnefond ; Maria Paulis ; ^{maria.paulis@ehu.es} ; Jose R. Leiza ^{jrleiza@ehu.es}
• 关键词：Polymer/clay nanocomposites ; Living/controlled polymerization ; Miniemulsion polymerization ; Adhesive properties
• 刊名：European Polymer Journal
• 出版年：2012
• 期刊代码：35_00143057
• 类别：ms
• 出版时间：May, 2012
• 卷：48
• 期：5
• 页码：896-905
• 文件大小：1352 K

摘要

The nitroxide mediated controlled surface initiated polymerization of methyl methacrylate (MMA)/butyl acrylate (n-BA) was carried out with a macroinitiator modified montmorillonite. The macroinitiator was synthesized by the nitroxide mediated polymerization of vinylbenzyl trimethylammonium chloride (VBTMACl), methylmethacrylate (MMA) and styrene (S) at 90 掳C using BlocBuilder庐. The macroinitiator was exchanged with the sodium cations of the montmorillonite, to yield surface modified reactive montmorillonite. The bulk polymerizations of BA/MMA from the clay surface produced controlled molecular weight polymers that were able to exfoliate the clay. This controlled polymer/clay nanocomposite was used as masterbatch and further dispersed in monomers and miniemulsified to perform miniemulsion polymerization of BA/MMA (90/10 wt.%) at 30 wt.%solids content at low emulsifier concentration. The adhesive properties of the nanocomposites prepared with the masterbatch were proved to be better than those prepared with an organically modified clay.