Process for production of highly rigid shaped product of polymer containing therein diacetylene group

摘要

A method for producing polyurethane or polyester containing therein the diacetylene group having high rigidity and useful in manufacturing precision mechanical parts, which comprises molding a polymer material containing therein the diacetylene group having a unit structure to be represented by the following general formula and a molecular weight in a range from 5x102 to 1x105 under a high pressure and at a temperature below the melting point of the polymer: <IMAGE> (I) wherein R is a divalent organic group; and x is an integer of 0 or 1.