A. Mishra et al., METHYL METHACRYLATE-N-CHLOROPHENYL MALEIMIDE COPOLYMERS - EFFECT OF STRUCTURE ON PROPERTIES, Journal of applied polymer science, 68(4), 1998, pp. 527-534
The article describes the preparation of cast acrylic sheets by copoly
merizing methyl methacrylate(MMA) with varying mole fractions of N-o-c
hlorophenyl maleimide(OC), N-m-chlorophenyl maleimide (MC), and N-p-ch
lorophenyl maleimide (PC) using benzoyl peroxide as an initiator. The
effect of incorporation of varying mole fraction of N-chlorophenyl mal
eimides in poly( methyl methacrylate) backbone on the optical, physico
mechanical, and thermal properties of cast acrylic sheets were evaluat
ed. Vicat softening temperature, glass transition temperature (T-g) an
d thermal stability of the copolymers increased with an increase in th
e maleimide content. The solar transmittance and percentage of transmi
ttance of the copolymer sheets having low mole fractions of N-chloroph
enyl maleimides (i.e., 0.025-0.085) were found to be comparable with t
hat of PMMA. Further increase in the comonomer content resulted in a d
ecrease in the percentage of transmittance. Copolymer sheets having lo
w mole fractions of N-chlorophenyl maleimides (0.025-0.108) have tensi
le strength comparable to that of PMMA, whereas the percentage of elon
gation decreased. Tensile modulus increased with increasing mole fract
ion of N-chlorophenyl maleimides. (C) 1998 John Wiley & Sons, Inc.