4.In this paper, bromized polystyrene flame retardant was synthesized by electrophilic substitution of waste polystrene with bromine using aluminium ehlorid as catalyst.
5.Results indicate interestingly that the double bond of GMA polymerized with polystyryl carbanion and the molar ratio of epoxy end group and polystyrene oligomer can be adjusted.
14.While laying plastic film on extruded polystyrene boards, static electricity was generated, igniting the gases, the foam and other flammable materials.
18.By contrast, early laboratory experiments used sterile spherical beads of just one type of plastic, polystyrene, which were bigger than the nano-size range.
19.While it can technically be recycled, it's not particularly practical, because a truck full of lightweight, air-filled Styrofoam doesn't melt down into a lot of polystyrene.
20.The Save-a-Cup scheme was set up by the vending and plastics industries to recycle as many as possible of the three-and-a-half billion polystyrene cups used each year.