文献类型：期刊文献

英文题名：Effects of ammonium polyphosphate to pentaerythritol ratio on composition and properties of carbonaceous foam deriving from intumescent flame-retardant polypropylene

作者：Xia, Yin[1];Jin, Fangfang[1];Mao, Zongwen[1];Guan, Yong[1];Zheng, Anna[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Shanghai Key Lab Adv Polymer Mat,Key Lab Ultrafin, Shanghai 200237, Peoples R China

年份：2014

卷号：107

起止页码：64

外文期刊名：POLYMER DEGRADATION AND STABILITY

收录：;EI(收录号：20142517829403);WOS:【SCI-EXPANDED(收录号:WOS:000342269600007)】；

基金：The work was financially supported by Shanghai Leading Academic Discipline Project (B502) and Shanghai Key Laboratory Project (08DZ2230500).

语种：英文

外文关键词：Intumescent flame retardant; Ammonium polyphosphate; Pentaerythritol; Ratio; Carbonaceous foam

摘要：In our work, a classical system was used for intumescent flame retardant (IFR), consisting of ammonium polyphosphate (APP) and pentaerythritol (PER). Effects of weight ratio of APP to PER (APP-PER ratio) on various aspects of carbonaceous foam deriving from polypropylene (PP)/IFR composites were investigated. Tested parameters included the flame retardancy and composition, as well as the structural and thermophysical properties of the carbonaceous foam. The carbonaceous foam resulting from PP/IFR composites was a physical mixture of phosphorous degradation products (PDPs) and insoluble chars. The structural and thermophysical properties of the carbonaceous foam affected by the APP-PER ratio include its expansion ratio, air tightness, thermal conductivity and thermal diffusivity. These properties in turn affected the efficiency of both mass (02 and combustibles) and heat transfer between the gas and the condensed phases. The content of PDPs in the mixed melt during the foaming stage and in the solidified carbonaceous foam was considered as the main regulator of these important properties of the carbonaceous foam. Concise heat and mass transfer theories were applied to qualitatively explain the results of flame retardant tests. (C) 2014 Elsevier Ltd. All rights reserved.