Ethylene-styrene Interpolymers (ESI) are a new class of polymers made by copolymerisation of ethylene and styrene monomers using INSITE® Technology, the patented constrained geometry single site catalysts and proprietary solution process of The Dow Chemical Company. The tradename of the Interpolymers is INDEX®. Foams with novel and unique properties have been made by expanding these polymers using physical blowing agents. This paper describes the properties of foams made from Interpolymers and blends with polyethylene.
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