| 摘要 |
Ion exchange membranes having at least two dimensions in excess of 10 mils. and being at least 5 mils. thick are made by blending a mixture of a monovinyl aryl sulphonic acid polymer, a plasticizer and a cross-linking agent, charging the mixture into a moulding press and heating at 125-175 DEG C. and 5000 p.s.i. for 20 minutes-1 hour. The polymer may be monovinyl toluene sulphonic acid which is prepared by sulphonating vinyl toluene polymer. The plasticizer may be glycerol, sorbitol or polyethylene glycol. The cross-linking agent may be di-tert.-butyl peroxide or t-butyl hydroperoxide. |
