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A Study on Starch-acrylic Graft Copolymerization by Emulsion Polymerization  

Hwang, Ju-Ho (Nipsea Chemical Korea Co., Ltd.)
Ryu, Hoon (Samyang Genex Corporation)
Cho, Ur-Ryong (Department of Applied Chemical Engineering, Korea Institute of Technology and Education)
Publication Information
Elastomers and Composites / v.43, no.4, 2008 , pp. 221-229 More about this Journal
Abstract
Starch as matrix polymer was used to do graft copolymerization with 2-ethylhexylacrylate, methyl methacrylate and acrylic acid. The polymerization was carried out by radical emulsion polymerization with increasing contents of starch. When 0.174% of $\alpha$-amylase as enzyme for starch was added, it was found that it made the best stable emulsion. The glass transion temperature of the polymerized material was increased with starch contents. The particle size and viscosity of the emulsion increased with starch contents due to the increased hydroxy group. Peel strength also increased with contents of starch because the enhanced hydroxy group caused to increase affinity between substrate surface and polymer materials. However, the initial tackiness decreased with starch contents owing to film hardness by higher glass transion temperature.
Keywords
graft copolymerization; emulsion polymerization; starch; peel strength; initial tackiness;
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