A process for making polymeric products of high tensile strength.

摘要

The invention relates to a process for making polymeric products of high tensile strength, and to the products obtained. By means of vapour deposition polymerization, a chemically non-crosslinked polymeric material having a theoretical tensile strength at break of at least 10 GPa, preferably at least 15 or even at least 20 GPa, is formed. Said polymeric material is then drawn under essentially oxygen-free conditions to a draw ratio above 10, preferably at least 20 or even at least 30 or 40. The polymeric material preferably is a poly(para-xylylene) or poly-p,p min -dimethylenebiphenyl polymer having a weight average molecular weight of 10<4>-10<7>. The drawing step is preferably performed at a temperature in a condis phase of the polymer.