文献类型：期刊文献

英文题名：Effects of Expandable Graphite and Modified Ammonium Polyphosphate on the Flame-Retardant and Mechanical Properties of Wood Flour-Polypropylene Composites

作者：Guo, Chuigen[1,2] Zhou, Lin[2] Lv, Jianxiong[1]

第一作者：Guo, Chuigen

通信作者：Guo, CG[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, State Key Lab Tree Genet & Breeding, Beijing 100091, Peoples R China;[2]Northeast Forestry Univ, Heilongjiang Key Lab Mol Design & Preparat Flame, Coll Sci, Harbin 150040, Peoples R China

年份：2013

卷号：21

期号：7

起止页码：449-456

外文期刊名：POLYMERS & POLYMER COMPOSITES

收录：;EI(收录号：20134817019445);Scopus(收录号：2-s2.0-84887931826);WOS:【SCI-EXPANDED(收录号:WOS:000326064300006)】；

基金：This work was financially supported by the Forestry industry research special funds for public welfare projects (201204704) and the Fundamental Research Funds for the Central Universities (DL13DB01).

语种：英文

外文关键词：Flame retardancy; Thermogravimetric analysis; Mechanical properties; Wood-Plastics composites; Expandable graphite

摘要：In this work, the effect of both the expandable graphite (EG) and ammonium polyphosphate modified with 3-(methylacryloxyl) propyltrimethoxy silane (M-APP) on the flame retardancy and mechanical properties of the wood-polypropylene composites (WPC) were studied. Cone calorimetry results indicated that both EG and M-APP could effectively improve the flame retardancy of WPC, while the retardancy of EG was better than that of M-APP. When the flame-retardant loading was 25 wt.%, the limiting oxygen index (LOI) values of M-APP-filled WPC (M-APP/WPC) and EG-filled WPC (EG/WPC) were 30.7% and 37.9%, respectively. According to the LOT test, the optimal ratio of M-APP to EG in WPC was 1:1 by weight, at which the LOT value of WPC was 39.3%. Thermogravimetric analysis (TG) results indicated that the addition of M-APP and EG to WPC could lead to an increase of char residue. Under the same conditions, the char residue of composite filled with the mixture of EG and M-APP (at a ratio of 1:1) was greater than that of composites filled individually at the same temperature. Both the tensile strength and flexural strength decreased at a certain extent due to incorporation of EG into WPC, but with the addition of the M-APP, the mechanical properties of these composite samples increased. At the ratio of 1:1 (M-APP to EG), the mechanical properties of the composite were not obviously decreased, and the flame retardancy was higher than the M-APP-filled WPC composites.