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Reactive compatibilization of a nitrile rubber/phenolic resin blend: Effect on adhesive and composite properties
Author(s) -
Achary P. Sasidharan,
Ramaswamy R.
Publication year - 1998
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(19980808)69:6<1187::aid-app16>3.0.co;2-q
Subject(s) - nitrile rubber , compatibilization , adhesive , materials science , nitrile , natural rubber , phenol , composite material , dynamic mechanical analysis , composite number , polymer blend , chemistry , polymer , organic chemistry , copolymer , layer (electronics)
Resole phenolic resins containing various p ‐cresol (PC) to phenol (P) mol ratios were prepared and characterized. These phenolic resins were blended with nitrile rubber (NBR) and the measurements of adhesive joint strength, stress–strain properties, DSC, TGA, DMA, TEM, and SEM were performed using a 50 : 50 NBR/phenolic resin blend. It was observed that the adhesive joint strength and the mechanical properties of the blend enhanced significantly on incorporation of p ‐cresol into the phenolic resin, and the optimum p ‐cresol/phenol mol ratio was in the vicinity of 2 : 1. Observation of a more continuous phase and the increase in T g of the rubber region in the blend indicated increased reactivity and compatibilization of NBR with phenolic resin as p ‐cresol was incorporated. The effect of silica filler on the properties of the nitrile rubber/phenolic resin blend was also studied without and with p ‐cresol modification and the results suggest that silica filler take not only the role of a reinforcing filler in the nitrile–phenolic–silica composite, but also a role as surface compatibilizer of the blend components. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 69: 1187–1201, 1998