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Correlation between migration behaviors of antiozonants and temperature
Author(s) -
Choi SungSeen
Publication year - 2001
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.1248
Subject(s) - carbon black , positive correlation , linear correlation , negative correlation , materials science , chemistry , analytical chemistry (journal) , thermodynamics , physics , composite material , chromatography , mathematics , natural rubber , statistics , medicine
Migration behaviors of antiozonants depending on temperature were studied using a carbon black‐filled NR vulcanizate containing N ‐phenyl‐ N ′‐isopropyl‐ p ‐phenylenediamine (IPPD) and N ‐phenyl‐ N ′‐(1,3‐dimethylbutyl)‐ p ‐phenylenediamine (HPPD) as antiozonants. The experimental temperatures were 100, 90, 80, and 70°C. Migration rates of them increased steeply by increasing the temperature. The correlation between the migration rates and the temperature was investigated using the half (t 1/2 ) ‐ and quarter (t 1/4 ) ‐lifetimes of the migrants remaining in the vulcanizate after the migration. The plot of log t versus 1/T was well fitted by the linear equation: The correlation coefficients were higher than 0.995. It was found that the migration behavior and temperature had a correlation of log t = b/T + c, where t and T are the migration time and temperature, b is E a /R, and c is the constant. The activation energies for the migration were 36.48 and 37.93 kJ/mol for IPPD and HPPD, respectively. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 1566–1570, 2001