Non-bioaccumulative, environmentally preferable stabilizer architectures for the dispersion polymerization of MMA in supercritical CO2
Non-bioaccumulative, environmentally preferable stabilizer architectures for the dispersion polymerization of MMA in supercritical CO2
复制标题
用于超临界 CO2 中 MMA 分散聚合的非生物累积性、环境友好的稳定剂结构
DOI：
10.1007/s00396-008-1860-8
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发表时间：
2008
影响因子：
2.4
通讯作者：
K. Lim
中科院分区：
文献类型：
--
作者：
H. S. Ganapathy;Jun Ho Kim;W. Kim;M. Woo;Min Young Lee;S. Hong;H. Kim;E. Jeong;K. Lim
为了克服与长链全氟化合物相关的环境问题，在本报告中，基于短链氟化聚合物的非生物累积性、环境友好的稳定剂架构已被设计用于甲基丙烯酸甲酯（MMA）在超临界CO2中的分散聚合。以甲基丙烯酸2-（二异丙基氨基）乙酯（DPAEMA）与甲基丙烯酸2，2，3，3，4，4，4-七氟丁酯（FBMA）或甲基丙烯酸2，2，3，3，4，4，5，5-八氟戊酯（2，2，3，3，4，4，5，5-octafluoropentyl methacrylate，FBMA）按不同共聚单体比例合成了无规共聚物。结果发现，共聚物有效地稳定PMMA胶乳在CO2中，导致形成自由流动的，球形的PMMA颗粒。随着稳定剂聚（FBMA-co-DPAEMA）的浓度从2%增加到6%（相对于MMA的w/w），粒径从3.02 μm减小到1.0 μm。
To overcome the environmental concerns associated with long-chain perfluorinated compounds, in this report, non-bioaccumulative, environmentally friendly stabilizer architectures based on short-chain fluorinated polymers have been designed for the dispersion polymerization of methyl methacrylate (MMA) in supercritical CO2. Random copolymers composed of 2-(diisopropylamino)ethyl methacrylate (DPAEMA) and 2,2,3,3,4,4,4-heptafluorobutyl methacrylate (FBMA) or 2,2,3,3,4,4,5,5-octafluoropentyl methacrylate were prepared with various comonomer ratios and utilized as stabilizers. It was found that the copolymers effectively stabilized PMMA latexes in CO2, leading to the formation of free-flowing, spherical PMMA particles. With increase in the concentration of the stabilizer poly(FBMA-co-DPAEMA) from 2% to 6% (w/w with respected to MMA), the particles diameter decreased from 3.02 to 1.0 μm.