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Distribution of molecular weights and branching of high‐density polyethylene
Author(s) -
Agarwal Ram Kumar,
Horská Jitka,
Stejskal Jaroslav,
Quadrat Otakar,
Kratochvíl Pavel,
Hudec Pavel
Publication year - 1983
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1983.070281111
Subject(s) - branching (polymer chemistry) , high density polyethylene , molar mass distribution , fractionation , viscometer , materials science , polyethylene , polymer chemistry , molecular mass , molecule , analytical chemistry (journal) , chemistry , chromatography , polymer , organic chemistry , composite material , viscosity , enzyme
Samples of industrial high‐density polyethylenes (Liten Macro, Liten FB 29, and Hostalen GM 9255 F) were divided into fractions by precipitation fractionation. The original samples and their fractions were characterized by light scattering, GPC, and viscometry. For all samples the molecular weight distribution is of logarithmic‐normal type. High‐density polyethylenes under investigation contain also high‐molecular‐weight fractions of pronouncedly branched structure, the content of branched molecules being, of course, considerably smaller than that in low‐density polyethylenes.