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The Effect of the Viscosity and Diene Contents of EPDM for Graft Copolymerization of AES  

Lee, Seul (Department of Advanced Chemicals & Materials Engineering, The Research Institute of Catalysts, Chonnam National University)
Lee, Byeong Do (Institute of CHEIL Industries, Production T&R Center)
Kim, Joong In (Institute of CHEIL Industries, Production T&R Center)
Song, Yo Soon (Department of Advanced Chemicals & Materials Engineering, The Research Institute of Catalysts, Chonnam National University)
Publication Information
Applied Chemistry for Engineering / v.20, no.3, 2009 , pp. 339-345 More about this Journal
Abstract
The graft copolymerization of acrylonitrile-EPDM-styrene (AES) was investigated under various reaction conditions such as the concentration of initiator, the content of diene and viscosity of EPDM, and the concentration of solvents. The conversion increased but the molecular weight and the rubber particle size decreased with the concentration of initiator. The graft ratio(GR) increased at low concentrations of the initiator but, after the maximum value, it gradually decreased with the concentration of initiator. Toluene as a single solvent gave the highest conversion and the mixture of ethyl benzene and toluene was better than toluene. The rubber particle size increased with the viscosity of EPDM and the graft ratio and the number of rubber particles with occluded SANs increased with the content of diene.
Keywords
AES resin; EPDM; graft copolymerization; occluded SAN;
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