A method for producing a high molecular weight polystyrene comprises polymerizing styrene monomer and from about 0.01 to about 2.0 parts by weight per 100 parts by weight total monomer of a polyfunctional monomer in an emulsion polymerization medium. Preferred polyfunctional monomers include allyl groups, vinyl groups or mixtures thereof, and the resultant high molecular polystyrene preferably has a weight average molecular weight, Mw, greater than about 400,000. Polymer blend compositions having improved flammability performance comprise a polyphenylene ether resin, a high impact polystyrene resin, a flame retardant and a high molecular weight polystyrene resin having a weight average molecular weight, Mw, greater than about 400,000.
生产高分子量聚
苯乙烯的方法包括在乳液聚合介质中聚合
苯乙烯单体和每 100 份单体中约 0.01 至约 2.0 份多官能团单体。优选的多官能团单体包括烯丙基、
乙烯基或它们的混合物,由此产生的高分子聚
苯乙烯最好具有大于约 400,000 的重量平均分子量(Mw)。具有更佳可燃性能的聚合物混合物组合物包括聚苯醚
树脂、高抗冲聚
苯乙烯树脂、阻燃剂和重量平均分子量(Mw)大于约 400,000 的高分子量聚
苯乙烯树脂。