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Synthesis of poly(chloroprene-co-isobutyl methacrylate) and its compatibilizing effect in polychloroprene/poly(isobutyl methacrylate) blends

A copolymer of chloroprene (CP) and isobutyl methacrylate (iBMA) [poly(CP‐co‐iBMA)] was prepared in benzene by radical copolymerization. For comparison, the graft copolymer of iBMA onto polychloroprene (CR) [poly(CR‐g‐iBMA)] was also prepared. The glass transition temperature of the poly(CP‐co‐iBMA)...

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Bibliographic Details
Published in:Journal of applied polymer science 1993-11, Vol.50 (7), p.1239-1245
Main Authors: Park, Choon Keon, Ha, Chang Sik, Lee, Jin Kook, Cho, Won Jei
Format: Article
Language:English
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Summary:A copolymer of chloroprene (CP) and isobutyl methacrylate (iBMA) [poly(CP‐co‐iBMA)] was prepared in benzene by radical copolymerization. For comparison, the graft copolymer of iBMA onto polychloroprene (CR) [poly(CR‐g‐iBMA)] was also prepared. The glass transition temperature of the poly(CP‐co‐iBMA) was about −32.4°C. The monomer reactivity ratios determined by the Finneman‐Ross method were given as r1 (CP) = 1.80 and r2 (iBMA) = 0.74 in the copolymerization of CP and iBMA, respectively. Miscibility of blends of CR and poly(isobutyl methacrylate) (PiBMA), prepared by casting from tetrahydrofuran (THF) solution, was investigated by their glass transition temperature behaviors and morphologies. Although the blends of CR and PiBMA were incompatible, the addition of poly(CP‐co‐iBMA) or poly(CR‐g‐iBMA) enhanced miscibility between the two base polymers. It was found that the extent of partial miscibility becomes larger when adding poly(CP‐co‐iBMA) than poly(CR‐g‐iBMA) as a third component to the CR/PiBMA blend of 50/50 wt % composition. © 1993 John Wiley & Sons, Inc.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.1993.070500715