PROCESS FOR MAKING MICROPOROUS PRODUCTS AND THE PRODUCTS THEREOF

摘要

P 34385 A process of producing a structural network from a semicrystalline, melt crystallisable polyarylene ether or polyarylene thioether comprising providing a molten mixture of at least one semicrystalline polymer in the presence of a melt plasticiser for the polymer which melt contains at least some polymer entities having a crystalline form, the total polymer concentration being between 5 and 50% by weight of the mixture of polymer and melt plasticiser, and heating the mixture of polymer and melt plasticiser at a heating rate of between 1.degree.C/hour and 1000.degree.C/hr, preferably between 10.degree.C/hour and 100.degree.C/hour until the mixture is at a temperature in the range 10.degree.C below to 20.degree.C above its clearing point and cooling the mixture until it solidifies whereby an open cell structure essentially free from granular superstructure is obtained.