Microemulsions with polymerizable surfactants. γ‐ray induced copolymerization of styrene and 11‐(acryloyloxy)undecyl(trimethyl)ammonium bromide in three‐component cationic microemulsion
Microemulsions with polymerizable surfactants. γ‐ray induced copolymerization of styrene and 11‐(acryloyloxy)undecyl(trimethyl)ammonium bromide in three‐component cationic microemulsion
复制标题
DOI：
10.1002/marc.1996.030171110
复制
发表时间：
1996-11
影响因子：
4.6
通讯作者：
M. Dreja;B. Tieke
中科院分区：
文献类型：
--
作者：
M. Dreja;B. Tieke
苯乙烯和阳离子表面活性剂11-(丙烯酰氧基)十一(三甲基)溴化铵(AUTMAB)在水中形成透明的球状微乳液，而不添加任何助表面活性剂。在γ辐照下，这两种单体在室温下共聚，形成直径约21 nm的纳米粒子，由苯乙烯与表面活性剂的摩尔比约为1.5：1的共聚物组成。过量的表面活性剂在胶束溶液中以均聚物的形式聚合。考虑到表面活性剂最有可能形成颗粒壳层，提出了一种结构模型。由于极性、共价键合的壳层，聚合物颗粒可以很容易地重新分散。
Styrene and the cationic surfactant 11-(acryloyloxy)undecyl(trimethyl)ammonium bromide (AUTMAB) form transparent, globular microemulsions in water without any addition of a cosurfactant. Upon γ-irradiation, the two monomers copolymerize at room temperature and form nanolatex particles of about 21 nm in diameter consisting of a copolymer with a mole ratio of styrene to surfactant of approximately 1.5:1. Excess surfactant is polymerized in the micellar solution by formation of homopolymer. A structure model is presented taking into account that the surfactant most likely forms the particle shell. Due to the polar, covalently bonded shell the polymer particles can be easily redispersed.