Kinetic analysis of the curing of branched phthalonitrile resin based on dynamic differential scanning calorimetry

• Published in: Polymer testing Vol. 96; p. 107062
• Main Authors: Zu, Yuan, Zong, Lishuai, Wang, Jinyan, Jian, Xigao
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.04.2021; Elsevier
• Subjects: Branched phthalonitrile; Curing kinetics; Differential scanning calorimetric; Differential scanning calorimetric; Curing kinetics; Branched phthalonitrile
• ISSN: 0142-9418; 1873-2348
• DOI: 10.1016/j.polymertesting.2021.107062

The aim of this work was to systematically investigate the kinetics of the curing reaction of branched phthalonitrile resin containing both flexible moiety and rigid aromatic structure in backbones with 4, 4′-diaminodiphenyl sulfone (DDS) as hardener. Differential scanning calorimetric (DSC) was mainly utilized with non-isothermal mode at different heating rates. The activation energy and the dependence of the curing activation energy with conversion were calculated and discussed based on Starink methods. Results showed that the curing reaction between branched phthalonitrile resin and 5 wt% DDS was chemistry and diffusion controlled. The predicted curves of autocatalytic kinetic model fit well with the non-isothermal DSC data that was important for predicting curing behavior of other complex phthalonitrile system. •The curing kinetic of branched phthalonitrile was systematically investigated.•DSC was mainly utilized with non-isothermal mode at different heating rates.•The activation energy was calculated by the Starink methods.•The curing reactions studied in this work were chemistry and diffusion controlled.