The amount of bromine is about 60~70 percent in bromized polystyrene.
阻燃剂的达60—70%。
The amount of bromine is about 60~70 percent in bromized polystyrene.
阻燃剂的达60—70%。
In this paper, bromized polystyrene flame retardant was synthesized by electrophilic substitution of waste polystrene with bromine using aluminium ehlorid as catalyst.
本文利用三氯化铝作催化剂,废聚烯与发生亲电取代反应合成化聚烯阻燃剂。
p-Ethyl-phenylacetylene was synthesized from starting materials ethylbenzene via five steps by acylation、reduction、dehydration、bromize、eliminition reaction.And the conditions were optimized.
以作为原料,通过酰化、还原、脱水、化和消除五步反应合成了基,并对反应条件进行了优化。
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