Yong Zhao, Boya Zhang, Ning Yan and Ramin. R. Farnood
In this study, mountain pine beetle infested lodgepole pine barks are liquefied in phenol and the properties of the liquefied bark, and liquefied bark-novolac resins are investigated. The liquefied bark-novolac resins reveal higher molecular weights, higher curing activation energies, faster curing rates, and higher pre-cure thermal stabilities than the lab-made control novolac resin without bark components. These findings suggest that the liquefied barks from beetle-infested lodgepole pines are suitable for partially substituting the petroleum-based phenol to synthesize phenol-formaldehyde novolac resins.