Aromatic polyethers,polysulfones, and polyketones as laminating resins. IV. Polymers with p-cyclophane units for crosslinking |
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Authors: | K P Sivaramakrishnan C Samyn Ira John Westerman Daniel Ting-Man Wong C S Marvel |
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Abstract: | 1,3-Bis(p-phenoxybenzenesulfonyl)benzene, 4,4′-bis(p-phenoxybenzenesulfonyl)diphenyl ether, and 4,4′-diphenoxydiphenyl sulfone were polymerized with isophthaloyl or terephthaloyl chlorides in Friedel-Crafts type polymerizations. These polymers had 2,2]p-cyclophane units in the backbone, introduced by employing 3,9-bis(p-phenoxybenzoyl) 2.2]p-cyclophane as part of the polyaryl ether component. Thermolysis of the dimethylene bridge of the 2.2]p-cyclophane monomer produced diradicals which combined across polymer chains to provide crosslinks. p-Cyclophane polymers with 1,3-bis-(p-phenoxybenzenesulfonyl)benzene showed potential as high performance, thermally stable laminating resins. |
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