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Studies on intumescent flame retardant polypropylene composites based on biodegradable wheat straw
Author(s) -
Nie Shibin,
Wu Wei,
Pan Yetang,
Dong Xiang,
Li Benxia,
Wang Deyi
Publication year - 2018
Publication title -
fire and materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.482
H-Index - 58
eISSN - 1099-1018
pISSN - 0308-0501
DOI - 10.1002/fam.2523
Subject(s) - fire retardant , ammonium polyphosphate , thermogravimetric analysis , intumescent , cone calorimeter , materials science , composite material , polypropylene , char , straw , composite number , thermal decomposition , thermal stability , ultimate tensile strength , pyrolysis , chemistry , organic chemistry , inorganic chemistry
Summary Wheat straw (WS) has numerous advantages compared with traditional bioadditives such as starch and lignin. So in this work, based on WS and silica microencapsulated ammonium polyphosphate, flame retardant polypropylene/wheat straw (WSP) composites were prepared by melted blend method. Flame retardant and thermal properties of WSP composites have been investigated. The results of cone calorimeter show that peaks of heat release rate and total heat release of the flame retardant WSP composite decrease substantially compared with those of pure polypropylene. The peak of heat release rate value of the flame retardant WSP composite decreases from 1290.5 to 247.9 kW/m 2 , and the total heat release value decreases from 119.4 to 46.3 MJ/m 2 . Meanwhile, thermal degradation and gas products of the flame retardant WSP composite were monitored by thermogravimetric analysis and thermogravimetric analysis‐infrared spectrometry. The result of thermal analysis shows that the flame retardant WSP composite has a high thermal stability and has a 30.0 wt% residual char at 600°C. From this work, we hope to provide a method to prepare flame retardant polymer composites with a biodegradable natural material‐WS.