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Characterization of mixtures of linear polyethylenes of ultrahigh and moderate molecular weights
Author(s) -
Ueda H.,
Karasz F. E.,
Farris R. J.
Publication year - 1986
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760262104
Subject(s) - crystallinity , materials science , ultimate tensile strength , linear low density polyethylene , polyethylene , solvent , composite material , molecular mass , polymer chemistry , analytical chemistry (journal) , chemical engineering , organic chemistry , chemistry , engineering , enzyme
The crystallinity, density, dynamic mechanical properties, (25 to 250°C, 11 Hz), and tensile properties at 25°C have been studied for two mixtures of ultrahigh‐molecular‐weight linear polyethylene ( M w = 2.0 × 10 6 ), abbreviated UHMWLPE, and moderate‐molecular‐weight linear polyethylene ( M w = 5.7 × 10 4 ), abbreviated LPE. These mixtures, which covered the entire composition range, had been prepared with differing solvent‐thermal histories. An enhancement of both crystallinity and density and an obvious synergism in tensile properties were observed for quenched films made from the mixture in which both components had been co‐dissolved. The data indicate that UHMWLPE and LPE can cocrystallize under given circumstances.