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Anomalous heat capacity of high‐density polyethylene melts at high temperature
Author(s) -
Hussein I. A.,
Williams M. C.
Publication year - 2011
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.34694
Subject(s) - heat capacity , polyethylene , high density polyethylene , rheology , materials science , calorimeter (particle physics) , thermodynamics , heat flow , surface tension , composite material , polymer chemistry , physics , thermal , optics , detector
The first measurements of heat capacity of high‐density polyethylene have been obtained for melts in the high‐temperature region of 180–260°C. A heat‐flow twin calorimeter was used. Abrupt transitions are noticed at 212 and 228°C, analogous to transitions seen earlier with rheological and surface tension measurements. Possible explanations for these phenomena are offered. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012