Preparation of Polymer Blends Consisting of a Synthetic Polypeptide and a Thermoplastic

Abstract

Polymer blends consisting of a synthetic polypeptide, i. e., poly(L-leucine), poly(L-phenylalanine), poly(L-valine), and poly(γ-benzyl L-glutamate), and a thermoplastic, i. e., polycarbonate, polysulfone, polychloroprene, ethylcellulose and poly (vinyl chloride) have been obtained by polymerization of N-carboxy-eα-amino acid anhydrides in the solution of the thermoplastic. Infrared spectra (Fig.1∼3) of cast film of the polymer blends show the peaks of both the synthetic polypeptide and the thermoplastic. The picture of the blended films observed under microscope and electron micrograph showed that the synthetic polypeptides formed from NCA's were finely dispersed in the thermoplastic.