Synthesis and Properties of N-cyclohexylmaleimide-Containing Graft-type MCS Resin

ABSTRACT N-cyclohexylmaleimide-containing Graft-type MCS resin was synthesized by suspension polymerization. Effects of graft conditions, such as initiator and monomer mixture composition, on graft efficiency (GE) were studied. GE has maximum value when the initiator concentration is 0.3% of the monomer content, and increases with increasing of cyclohexylmaleimide (ChMI) content at fixed initiator concentration. Effects of monomer mixture composition on the properties of the copolymers were also investigated. The results show that the molecular weight ( and ), Tg, TVicat, and degradation temperature of the copolymers increased with increasing ChMI moieties in the copolymer. The mechanical properties (impact strength and tensile strength) were increased due to the presence of ChMI. The apparent viscosity ηa and the non-newtonian flow parameter power n increase with increasing content of ChMI, and the melt is a pseudoplastic liquid. The morphological structure of graft-type MCS resin was investigated by scanning electron microscopy (SEM).