Premium
Flame retardancy and mechanical properties of a novel intumescent flame‐retardant unsaturated polyester
Author(s) -
Gao Ming,
Wang Hao,
Wang Yanxia,
Shen Tengfei,
Wu Weihong
Publication year - 2016
Publication title -
journal of vinyl and additive technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 1083-5601
DOI - 10.1002/vnl.21453
Subject(s) - intumescent , limiting oxygen index , fire retardant , char , materials science , flammability , ultimate tensile strength , charring , thermal stability , thermal decomposition , composite material , carbonization , polyester , izod impact strength test , pyrolysis , chemical engineering , chemistry , organic chemistry , scanning electron microscope , engineering
A novel macromolecular intumescent flame retardant (MIFR) was synthesized. Unsaturated polyester (UP) filled with MIFR as flame‐retardant additive was prepared. The effects of MIFR on properties such as tensile strength, impact strength, flame‐retardant behavior, thermal stability, and morphology of char were studied. Its flammability and burning behavior were characterized by UL 94 and limiting oxygen index. Twenty‐four percent of MIFR were doped into UP to get 30.5% of limiting oxygen index and UL 94 V‐0, whereas its tensile strength and the impact strength were decreased by only 7.2% and 7.0%, respectively. Activation energy for the decomposition of samples was obtained by using the Kissinger equation. The results for UP containing MIFR, compared with UP, show that the weight loss, thermal stability, and the decomposition activation energy decreased, and the char yield increased, showing that MIFR can catalyze decomposition and carbonization of UP to form an effective charring layer to protect the underlying substrate. J. VINYL ADDIT. TECHNOL., 22:350–355, 2016. © 2014 Society of Plastics Engineers