Poly(arylene thioether-ketones) improved in melt stability and preparation process thereof.

摘要

Disclosed herein is a process for the preparation of a poly(arylene thioether-ketone) improved in melt stability, which comprises subjecting a poly(arylene thioether-ketone) (PTK) to a heat treatment for 5 - 5 x 10<3> minutes in a powdery state and a temperature range of 200-350 DEG C. The PTK has predominant recurring units of the formula <CHEM> and has a melting point, Tm of 310-380 DEG C, a melt crystallization temperature, Tmc (420 DEG C/10 min) of at least 210 DEG C, a residual melt crystallization enthalpy, DELTA Hmc (420 DEG C/10 min) of at least 10 J/g and a reduced viscosity of 0.2-2.0 dl/g. PTKs improved in melt stability and prepared in accordance with the above-described preparation process are also disclosed.