Thermoplastic Composites of Acylated Lignins and Lignins

Abstract

Thermoplasticization of lignin was achieved by the acylation of polyfunctional lignin yielded in the course of the alkali cooking of wood tips. The kneading of acylated lignin and poly(ε-caprolactone) gave the composite film with reasonable flexibility and light blocking property which might provide several utilization ways of lignin to serve as substitution of petroleum products. The un-acylated (virgin) lignin also gave flexible, thermoplastic composites with polypropylene (PP) when maleate-modified PP co-existed.