Abstract
Ultradrawing of a series of films produced by gelation/crystallization from dilute decalin solutions of ultrahigh-molecular-weight polyethylene (UHMWPE) and low-molecular-weight polyethylenes (LMWPEs) with about the same molecular weight but varying short-chain branched lengths was reported. The achievable maximum draw ratios of gel films prepared from these solutions were found to depend significantly upon the concentrations of the solutions. It is worth noting that addition of less than about 5 wt% of LMWPE in UHMWPE/LMWPE blend gel films significantly improve their critical draw ratios (λc) than that of gel films prepared from pure UHMWPE solution, and this improvement in λc is further enhanced with decreasing short-chain branched lengths of LMWPEs. These interesting phenomena were investigated in terms of the reduced viscosities of these solutions, tie molecule densities, morphology, melting, tensile and birefringence of these undrawn and/or drawn films.
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Yeh, JT., Wu, HC. Ultradrawing Gel Films of Blends of Ultrahigh-Molecular-Weight Polyethylene and Low-Molecular-Weight Polyethylenes with Varying Short-Chain Branched Lengths. Polym J 30, 1–10 (1998). https://doi.org/10.1295/polymj.30.1
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DOI: https://doi.org/10.1295/polymj.30.1
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