Abstract: An extrusion polymerization process is described in which the polymerization of vinylic monomers, in particular acrylic monomers, is carried out in bulk in an extruder. The polymerization reaction is catalysed by a catalyst composition comprising an initiator, e.g. a ureido substituted silane, and a co-catalyst which is a salt providing a source of anions, e.g. fluoride ions.

Abstract: AN electrochemical cell which comprises a conductive anode and cathode capable of mutual electrochemical reaction and separated by a solid electrolyte comprising:(a) a matrix of sheets of atoms, having side-chains linked to the sheets, which side chains comprise polar groups free from active hydrogen atoms,(b) a polar aprotic liquid dispersed in the matrix, and(c) a highly ionized ammonium or alkali metal salt dissolved in the matrix and/or liquid,a cathode therefor, the electrolyte per se, and processes for the preparation of the electrolyte and the cathode.