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Synthesis of poly(chloroprene‐ co ‐isobutyl methacrylate) and its compatibilizing effect in polychloroprene/poly(isobutyl methacrylate) blends
Author(s) -
Park Choon Keon,
Ha Chang Sik,
Lee Jin Kook,
Cho Won Jei
Publication year - 1993
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1993.070500715
Subject(s) - miscibility , copolymer , methacrylate , polymer chemistry , chloroprene , glass transition , materials science , chemistry , monomer , polymer , organic chemistry , natural rubber
Abstract 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 r 1 (CP) = 1.80 and r 2 (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.