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Effects of aramid honeycomb core on the flame retardance and mechanical property for isocyanate‐based polyimide foams
Author(s) -
Sun Gaohui,
Wang Wenpeng,
Wang Leichao,
Yang Zuodong,
Liu Lianhe,
Wang Jun,
Ma Ning,
Wei Hao,
Han Shihui
Publication year - 2017
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.45041
Subject(s) - materials science , cone calorimeter , composite material , polyimide , aramid , composite number , limiting oxygen index , honeycomb , char , porosity , compressive strength , layer (electronics) , pyrolysis , chemical engineering , engineering , fiber
In this work, composite materials containing aramid honeycomb core (ARHC) reinforced isocyanate‐based polyimide foams (IBPIFs) were prepared by a simple free‐foaming process. The flame retardance, smoke performance, and mechanical property of the composite materials along the transverse (W) and longitude (L) directions of ARHC were studied. Results of limiting oxygen index and cone calorimeter reveal that the space partition action of ARHC on IBPIFs, barrier action of honeycomb structure on fire, and generation of straight, flurry and porous char layer in the honeycomb cells during combustion effectively enhanced the flame retardance of IBPIFs. Mechanical property test shows that IBPIFs and ARHC presented a positive synergetic effect, and ARHC increased the compression strength of IBPIFs along the W and L directions of ARHC by approximately 300%. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45041.