{TAIL ~ Exemplary types} of polymers include polystyrenes, polyvinyl chlorides, polyesters, polyethylene terephthalates, low density polyethylenes, polypropylenes, apolyamides, acrylonitrite butadiene styrenes, polycarbonates, {HEAD ~ polycarbonate/acrylonitrite butadiene styrene blends}, polyurethanes, melamine formaldehydes, plastics, and elastomeric plastics 
{ TAIL ~ Exemplary types } of polymers include polystyrenes , polyvinyl chlorides , polyesters , polyethylene terephthalates , low density polyethylenes , polypropylenes , apolyamides , acrylonitrite butadiene styrenes , polycarbonates , { HEAD ~ polycarbonate / acrylonitrite butadiene styrene blends } , polyurethanes , melamine formaldehydes , plastics , and elastomeric plastics
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