STRUCTURE OF POLYVINYL ALCOHOL/SODIUM SALT-POLYSTYRENE SULFONIC ACID (PVA/NaPSS) BLEND HYDROGELS AND CONTRACTION BY WATER ADSORPTION INTO DRIED BLEND HYDROGELS IN THE DRAWN STATE. - Nagura M.; Usui K.; Takagi N.; Nishimura H.; Murai J.; Ohkoshi Y. (Polymer Journal, 1993)