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