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Effect of catalyst residues on the degradation of rigid foam polyurethane
Author(s) -
AbuZeid M. E.,
Nofal E. E.
Publication year - 1986
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.1986.070310802
Subject(s) - polyurethane , degradation (telecommunications) , catalysis , materials science , polymerization , polymer , chemical engineering , composite material , polymer chemistry , chemistry , organic chemistry , telecommunications , computer science , engineering
Immediately after heating rigid foam polyurethane (PU) at 165°C, it degrades in accordance with the degradation mechanisms suggested by Abu‐Zeid et al. in earlier publications. However, after three days all photoacoustic spectra (PAS) bands indicative of PU degradation almost disappeared, and the samples were found to resist both UV and thermal degradation for a wide range of temperatures and UV dosages. Residual catalysts left from PU polymerization were found to be the main cause of its degradation. When these residues were consumed in the process of solid repolymerization, PU becomes immune to heat and UV degradation.