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Diffusion of high molecular weight, sterically hindered amines in polypropylene
Author(s) -
Mar'in A. P.,
Borzatta V.,
Bonora M.,
Greci L.
Publication year - 2000
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/(sici)1097-4628(20000214)75:7<890::aid-app5>3.0.co;2-k
Subject(s) - diffusion , steric effects , polypropylene , polymer chemistry , polymer , chemistry , materials science , chemical engineering , thermodynamics , organic chemistry , physics , engineering
The diffusion of sterically hindered amines with molecular weight 1364, 1393, 2286, and 2758 was studied in polypropylene between 60 and 130°C. The diffusion coefficient changes with time and plots log D vs 1/ T are given as broken lines for additives with molecular weight 2286 and 2758. IR data show that changes in the polymer structure during diffusion occurs. Slow diffusion of the additives in PP at elevated temperatures and high activation energies indicate that no migration at room temperature should take place. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 75: 890–896, 2000