Preparation and properties of halogen‐free flame‐retarded phthalonitrile–epoxy blends | Zendy

Zhao Xin | Zendy; Lei Yajie | Zendy; Zhao Rui | Zendy; Zhong Jiachun | Zendy; Liu Xiaobo | Zendy

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Preparation and properties of halogen‐free flame‐retarded phthalonitrile–epoxy blends

Author(s) -

Zhao Xin,

Lei Yajie,

Zhao Rui,

Zhong Jiachun,

Liu Xiaobo

Publication year - 2011

Publication title -

journal of applied polymer science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.575

H-Index - 166

eISSN - 1097-4628

pISSN - 0021-8995

DOI - 10.1002/app.34877

Subject(s) - phthalonitrile , thermogravimetric analysis , epoxy , materials science , curing (chemistry) , copolymer , polymer chemistry , differential scanning calorimetry , thermosetting polymer , limiting oxygen index , fourier transform infrared spectroscopy , thermal decomposition , composite material , chemical engineering , chemistry , pyrolysis , phthalocyanine , polymer , organic chemistry , char , physics , engineering , thermodynamics , nanotechnology

Halogen‐free flame‐retarded blends composed of 2,2‐bis[4‐(3,4‐dicyanophenoxy) phenyl] propane (BAPh) and epoxy resin E‐44 (EP) were successfully prepared with 4,4′‐diaminodiphenyl sulfone as a curing additive. The structure of the copolymers was characterized by Fourier transform infrared spectroscopy, which showed that epoxy groups, a phthalocyanine ring, and a triazine ring existed. The limiting oxygen index values were over 30, and the UL‐94 rating reached V‐0 for the 20 : 80 (w/w) BAPh/EP copolymers. Differential scanning calorimetry and dynamic rheological analysis were employed to study the curing reaction behaviors of the phthalonitrile/epoxy blends. Also, the gelation time was shortened to 3 min when the prepolymerization temperature was 190°C. Thermogravimetric analysis showed that the thermal decomposition of the phthalonitrile/epoxy copolymers significantly improved with increasing BAPh content. The flexible strength of the 20:80 copolymers reached 149.5 MPa, which enhanced by 40 MPa compared to pure EP. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

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