RELATIONS OF WEIGHT-AVERAGE MOLECULAR-WEIGHTS AND THE THERMAL-PROPERTIES OF N-CYCLOHEXYL MALEIMIDE-METHYL METHACRYLATE

N-cyclohexyl maleimide (CHMI) was used to copolymerize with methyl met hacrylate (MMA) by a suspension copolymerization method to produce hea t-resistant poly(MMA) (PMMA) in this article. The copolymers were synt hesized by changing the weight fractions of azobisisobutyronitrile (AI BN) and dadecanethiol (DDM), while the weight ratio of CHMI to MMA was defined. The effects of the weight fractions of AIBN and DDM on weigh t-average molecular weight (M-w) were studied. Meanwhile, relations be tween M-w and the glass transition temperature (T-g) and decomposition temperature (T-d) and M-w and the melt flow index (MFI) were describe d. (C) 1998 John Wiley & Sons, Inc.