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- W2071403195 abstract "Films of a polyethylene-polypropylene blend were prepared by gelation/crystallization from semidilute solutions using ultrahigh molecular weight polyethylene (Mv = 6 × 106 and polypropylene (Mv = 4.4 × 106). The polyethylene/polypropylene (PE/PP) compositions chosen were 7525, 5050 and 2575. The elongation was carried out in a hot poly(ethylene glycol) oil bath at 140°C. The mechanical properties of the resultant gel films were dependent upon the PE/PP compositions at each draw ratio. This interesting phenomenon is discussed using the second-order orientation factors of the c axes of polyethylene and polypropylene within the blend films. It turns out that the orientation factors of the polyethylene and polypropylene phases within the blend films at each draw ratio are different from those of their individual homopolymers with the corresponding draw ratio and this tendency is pronounced for blend films with a draw ratio of 20. Therefore, it is insufficient to explain the dependence of PE/PP composition on the storage and loss moduli by a composite law based on a simple model system in which polyethylene layers lie adjacent to polypropylene layers with the interfaces parallel and perpendicular to the stretching direction and the morphological properties of the two phases within the blend films are equivalent to those of their individual homopolymers at each draw ratio." @default.
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- W2071403195 date "1990-08-01" @default.
- W2071403195 modified "2023-09-23" @default.
- W2071403195 title "Mechanical properties of ultrahigh molecular weight polyethylene-polypropylene blend films produced by gelation/crystallization from solution" @default.
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- W2071403195 doi "https://doi.org/10.1016/0032-3861(90)90150-w" @default.
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