Macroinitiator and Macromonomer Modified Montmorillonite for the Synthesis of Acrylic/MMT Nanocomposite Latexes
Macroinitiator and Macromonomer Modified Montmorillonite for the Synthesis of Acrylic/MMT Nanocomposite Latexes
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DOI：
10.1021/ma802467j
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发表时间：
2009-04
期刊：
影响因子：
5.5
通讯作者：
G. Diaconu;M. Mičušík;Audrey Bonnefond;M. Paulis;J. R. Leiza
中科院分区：
文献类型：
--
作者：
G. Diaconu;M. Mičušík;Audrey Bonnefond;M. Paulis;J. R. Leiza
采用阳离子高分子单体2-甲基丙烯酰乙基十六烷基二甲基溴化铵MA16和阳离子高分子引发剂阳离子丙烯酸/苯乙烯低聚物端部包覆氮氧化物，对原始Na - MMT进行改性，以增强水性纳米复合材料中粘土片与宿主丙烯酸聚合物基体之间的相容性。两种阳离子在蒙脱土中成功交换。采用微乳液聚合法制备丙烯酸(MMA/BA)/粘土水性纳米复合材料。含30%固体乳液稳定，无凝块，具有比原始丙烯酸共聚物更好的机械、热学和阻隔性能。
A cationic macromonomer, 2-methacryloylethylhexadecyldimethylammonium bromide MA16, and a cationic macroinitiator, cationic acrylic/styrene oligomer end-capped with a nitroxide, were used to modify pristine Na−MMT, to enhance compatibility between the clay platelets and the host acrylic polymer matrix in waterborne nanocomposites. Both cationic species were successfully exchanged in the montmorillonite. The organically modified clays were used for the synthesis of acrylic (MMA/BA)/clay waterborne nanocomposites by miniemulsion polymerization. The 30% solids containing latexes were stable and coagulum free and presented better mechanical, thermal and barrier properties than the pristine acrylic copolymer.