Production of Core-shell Particles by Combined Semibatch Emulsion/Suspension Polymerizations

被引：16

作者：

Besteti, Marina Damiao ^{[1
]}

Guimaraes Freire, Denise Maria ^{[2
]}

Pinto, Jose Carlos ^{[1
]}

机构：

[1] Univ Fed Rio de Janeiro, COPPE, Programa Engn Quim, BR-21941972 Rio De Janeiro, Brazil

[2] Univ Fed Rio de Janeiro, Inst Quim, BR-21941972 Rio De Janeiro, Brazil

来源：

MACROMOLECULAR REACTION ENGINEERING | 2011年 / 5卷 / 9-10期

关键词：

core-shell polymers; combined emulsion - suspension polymerization; monomers; SUSPENSION POLYMERIZATION; FILM FORMATION; EMULSION; STYRENE; LATICES; LATEXES;

D O I：

10.1002/mren.201100012

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Core-shell polymer particles were produced by combined semibatch emulsion/suspension polymerizations, using different monomers. It is shown that the morphology of the shell depends on the glass transition temperature (T(g)) of the emulsified particles and that specific areas can vary considerably (7.9 to 37 m(2).g(-1)), depending on reaction conditions and used monomers. Particularly, a thin film is formed around the core when the T(g) of the polymer that constitutes the shell is lower than the reaction temperature, while a porous shell is formed when the T(g) of the polymer material is higher than the reaction temperature. Based on the observed data, a physical model was proposed to explain the formation of core-shell particles by combination of typical suspension and emulsion polymerization recipes.

引用

页码：518 / 532

页数：15

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