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New epoxy resins. III. Application of fourier transform IR to degradation and interaction studies of epoxy resins and their copolymers

1983; Wiley; Volume: 28; Issue: 3 Linguagem: Inglês

10.1002/app.1983.070280314

1097-4628

C. S. Chen, Bernard J. Bulkin, E. M. Pearce,

Synthesis and properties of polymers

Abstract In the Fourier transform infrared (FT–IR) study, diglycidyl ether of bisphenol A (DGEBA) did not show aldehyde or perester absorption when it was normally cured with trimethoxyboroxine (TMB) under a nitrogen atmosphere. Neither alumina nor gold surfaces would cause oxidation of the system. In air, alumina appeared to accelerate the oxidation when compared to gold. The cure of the epoxy in oxygen appeared to cause increased Claisen rearrangement when compared with the same cure in a nitrogen atmosphere. The DGEBA cured with TMB under air or nitrogen atmospheres showed differences in their degradation patterns. The TMB‐cured DGEBA and diglycidyl ether of 9,9‐bis(4‐hydroxyphenyl) fluorene (DGEBF) copolymer had a higher degree of reaction and lower degradation than was shown by the synthetically generated spectra based on the FT–IR summation of the spectra of the respective homopolymers.