Adhesion of olefin block copolymers to polypropylene and high density polyethylene and their effectiveness as compatibilizers in blends |
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Authors: | Yijian Lin Gary R Marchand Eric Baer |
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Affiliation: | a Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, OH 44106-7202, USA b The Dow Chemical Company, Freeport, TX 77541, USA |
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Abstract: | Adhesion of four ethylene-octene block copolymers (OBCs) to polypropylene (PP) and high density polyethylene (HDPE) was studied by peeling PP/OBC/HDPE microlayered tapes. The four OBCs had different comonomer composition, mechanical properties and phase morphology. Through the Irwin damage zone analysis, it was found that the stress-strain behavior of OBC was the primary factor that determined the adhesion strength. Effectiveness of these OBCs as compatibilizers in PP/HDPE blends was also investigated. Toughness of all OBC-compatibilized blends was effectively improved. The OBCs having higher adhesion strength also resulted in better mechanical performance for the compatibilized blends. A quantitative correlation was established between the adhesion strength and mechanical performance of the blends. |
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Keywords: | Olefin block copolymer Adhesion Compatibilizer |
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