METHYL METHACRYLATE-N-CHLOROPHENYL MALEIMIDE COPOLYMERS - EFFECT OF STRUCTURE ON PROPERTIES

Citation
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
Citations number
15
Categorie Soggetti
Polymer Sciences
ISSN journal
00218995
Volume
68
Issue
4
Year of publication
1998
Pages
527 - 534
Database
ISI
SICI code
0021-8995(1998)68:4<527:MMMC-E>2.0.ZU;2-W
Abstract
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.