Epoxy-acrylic core-shell particles by seeded emulsion polymerization

详细信息    查看全文

• 作者：Liang Chen^a ; ^{LiangChen@Dow.com" class="auth_mail" title="E-mail the corresponding author} ; Liang Hong^a ; Jui-Ching Lin^b ; Greg Meyers^b ; Joseph Harris^b ; Michael Radler^c
• 关键词：Mechanical dispersion ; Seeded emulsion polymerization ; Epoxy-acrylic core-shell particles ; Scanning transmission X-ray microscopy ; Peak force tapping atomic force microscopy
• 刊名：Journal of Colloid and Interface Science
• 出版年：2016
• 出版时间：1 July 2016
• 年：2016
• 卷：473
• 期：Complete
• 页码：182-189
• 全文大小：2382 K

文摘

We developed a novel method for synthesizing epoxy-acrylic hybrid latexes. We first prepared an aqueous dispersion of high molecular weight solid epoxy prepolymers using a mechanical dispersion process at elevated temperatures, and we subsequently used the epoxy dispersion as a seed in the emulsion polymerization of acrylic monomers comprising methyl methacrylate (MMA) and methacrylic acid (MAA). Advanced analytical techniques, such as scanning transmission X-ray microscopy (STXM) and peak force tapping atomic force microscopy (PFT-AFM), have elucidated a unique core-shell morphology of the epoxy-acrylic hybrid particles. Moreover, the formation of the core-shell morphology in the seeded emulsion polymerization process is primarily attributed to kinetic trapping of the acrylic phase at the exterior of the epoxy particles. By this new method, we are able to design the epoxy and acrylic polymers in two separate steps, and we can potentially synthesize epoxy-acrylic hybrid latexes with a broad range of compositions.