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Thermal and oxidative effects in polyethylenes above 200°C
Author(s) -
Quackenbos H. M.
Publication year - 1966
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.760060205
Subject(s) - polyethylene , chain scission , materials science , fabrication , thermal oxidation , diffusion , atmosphere (unit) , chemical engineering , thermal , odor , bond cleavage , polymer chemistry , organic chemistry , composite material , polymer , thermodynamics , chemistry , catalysis , engineering , medicine , alternative medicine , physics , pathology , layer (electronics)
There is considerable literature on the behavior of polyethylene below 200°C and above 400°C. This paper presents results on both high and low density polyethylene between 200 0 and 400°C, a range of practical import for various fabrication and processing steps. Practical exposure times may be short and the experimental procedures were designed to give meaningful results for times as low as 1 min. The principal effects are chain‐session and oxidation. Session was isolated by applying an atmosphere of pure nitrogen and proved uite shlow at 300°C but rapid at 400°C. The course of scission and produces discoloration, odor, and rising carbonyl content. A brief discussion is given of the role of diffusion in oxidation.