The cnar-forming characteristics of aromatic polymers containing one or more combustion resistant components are improved by incorporating therein a polybenzyl, a polyallyl, or an allyl benzyl moiety. As an example, a styrene polymer comprising a halogenated comonomer such as bromostryene is rendered char-forming by the presence of copolymerized vinylbenzyl chloride in the styrene polymer. Such polymeric compositions are useful in the manufacture of shaped articles such as housings for electrical appli- cances.
通过在含有一种或多种耐燃烧成分的芳香族聚合物中加入聚苄基、聚烯丙基或烯丙基苄基分子,可改善该聚合物的成
炭特性。例如,含有卤代共聚单体(如
溴代
苯乙烯)的
苯乙烯聚合物,通过在
苯乙烯聚合物中加入共聚
氯乙烯苄基,可使其形成
炭。这种聚合物组合物可用于制造成型物品,如电器外壳。