A novel addition curable novolac bearing phthalonitrile groups: synthesis, characterization and thermal properties

Polymer Bulletin - Tập 59 - Trang 185-194 - 2007
Yang Yang1, Zhang Min1, Lei Yi1
1College of Polymer Science and Engineering, Sichuan University, State Key Laboratory of Polymer Materials Engineering of China, Chengdu, P.R. China

Tóm tắt

Novel phenolic novolac resins, bearing phthalonitrile groups anchored to benzene ring through phenyl azo linkage were realized by the coupling reaction between novolac and phthalonitrile diazonium salt. The diazo-coupling occurred to a maximun of about 61%. The apparent molecular weight, determined form GPC showed a downward drift with increase in degree of phthalonitrile substitution. Analysis using DSC technique indicated that the resin underwent curing in a temperature range form 290 to 320 °C . The curing occurred via addition polymerization of phthalonitrile groups. The thermal stability and anaerobic char yield of the polymers increased proportion to the crosslinking. The probable cure mechanics were discussed.

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Polymer Bulletin

Tập 59

185-194

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