Experimental study demonstrates enhanced permanence and weatherability in PVC modified with ethylene copolymer resins, highlighting a robust alternative to liquid plasticizers.
Ethylene copolymer resin (ECR) modifiers, designed to be soluble in all proportions in PVC, form a wide variety of plasticized PVC blends. These solid, high molecular weight ( Mw > 250,000) resin modifiers, unlike conventional liquid plasticizer, exhibit outstanding permanence in PVC. Compounding procedures, used for liquid plasticized PVC, are sometimes inadequate to produce homogeneous blends of PVC/ECR. A number of effective melt compounding techniques and a new family of ECR modifiers have been developed to produce homogeneous blends exhibiting many outstanding properties, including fluids/chemical resistance, high/low‐temperature service, and weatherability.
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Hofmann et al. (1994) studied this question.
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