Syntheses of copolymers of chloroprene with ethylmethacrylate and glycidylmethacrylates

Abstract

AbstractChloroprene (2‐chloro‐1,3‐butadiene; CP) was prepared by dehydrochlorination of 3,4‐dichloro‐1‐butene (DCB) in aquous solution of sodium hydroxide in the presence of tetrahydrofurfuryl alcohol (THFA) at 60°C. The copolymers of CP with ethylmethacrylate (EMA) and glycidylmethacrylate (GMA) were prepared by radical solution polymerization in benzene. The copolymers, poly(CP‐co‐EMA) and poly(CP‐co‐GMA), were characterized by FT‐IR and 1H‐NMR spectrophotometers and differential scanning carolimetry (DSC). It was observed that the copolymers were amorphous and had glass transition temperatures of about −34.5 and −16.4°C, respectively. The monomer reactivity ratios were given as r1(CP) = 2.14 and r2(EMA) = 0.18 in the copolymerization of CP and EMA, and as r1(CP) = 4.02 and r2(GMA) = 0.12 in copolymerization of CP and GMA, respectively. For comparison, the graft copolymers of EMA or GMA onto CR(poly(CR‐g‐EMA) and poly(CR‐g‐GMA)) were also prepared. © 1994 John Wiley & Sons, Inc.