Design of the phthalonitrile‐based composite laminates by improving the interfacial compatibility and their enhanced properties. Issue 7 (24th October 2017)

• Record Type: Journal Article
• Authors: Ren, Dengxun; Lei, Yangxue; Pan, Hai; Yan, Liang; Xu, Mingzhen; Liu, Xiaobo
• Is Part Of: Journal of applied polymer science. Volume 135:Issue 7(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-10-24
• Subjects: copolymers -- crosslinking -- manufacturing -- ring‐opening polymerization; Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.45881
• Languages: English
• ISSNs: 0021-8995

Abstract

ABSTRACT: Phthalonitrile containing benzoxazine (BA‐ph) and cyanate ester (CE) were chosen as the thermosetting matrix and the glass fiber (GF) reinforced laminates formed at low temperature were designed. The polyarylene ether nitriles containing pendent carboxyl groups (CPEN) was selected to modify the interfacial interaction between the resin matrix and GFs. Two methods of introducing CPEN were compared and the effects of CPEN on curing behaviors and properties of the composites were investigated. Results showed that with the CPEN, exothermic peaks shifted to lower temperature and curing temperatures of BA‐ph/CE decreased slightly. The mechanical and thermal properties of GF‐reinforced composites were discussed and the results indicated that the composites of modified GFs with CPEN exhibited outstanding mechanical properties, higher glass transition temperature ( Tg > 290 °C) than that of composites composed of CPEN mixed with BA‐ph/CE. Moreover, GF‐reinforced composites showed stable dielectric constants (3.8–4.5) and low dielectric loss (0.005–0.01), which were independent of the frequency. In sum, the various methods of the introduction of CPEN in the GF‐reinforced composites may provide a new route to prepare improved composites, meanwhile, composites with outstanding processability and excellent mechanical and thermal properties are expected to be widely applied in the fields of high‐performance structural materials. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci.2018, 135, 45881. Abstract :