Hydrogen bonding in polyamide toughened novolac type phenolic resin

The hydrogen bonding, miscibility, and thermal stability of polyamide tough ened novolac type phenolic resin were investigated. The intermolecular forc e of the resin increased with the content of the soft segments of polyamide s (nylon 6, nylon 66) that absorb the loads in the network of brittle pheno lic resin. IR (IR region) spectra and differential scanning calorimetry res ults confirmed that the phenolic/polyamide blend was completely miscible. I ts thermal degradation temperature was higher than 400 degrees C and increa sed with the increasing of polyamide content. (C) 1999 John Wiley & Sons, I nc.