文献类型：期刊文献

英文题名：Synthesis of a novel phosphorus-containing epoxy curing agent and the thermal, mechanical and flame-retardant properties of the cured products

作者：Wang, Guiyou[1];Nie, Zubao[1]

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

年份：2016

卷号：130

起止页码：143

外文期刊名：POLYMER DEGRADATION AND STABILITY

收录：;EI(收录号：20162602544777);WOS:【SCI-EXPANDED(收录号:WOS:000380972400017)】；

基金：This research was supported by Shanghai Brightfield Chemicals Co. Ltd., China. The authors wish to thank associated Prof. Yun Ding and Prof. Aiguo Hu for their kindly assistance.

语种：英文

外文关键词：Epoxy resin; Reactive flame retardant; Aromatic polyphosphonates; Mechanical property; Thermal degradation; Cone calorimeter

摘要：A novel a, to-dicarboxyl aromatic polyphosphonate (HP-1001-COOH) was synthesized and characterized. It was used as a reactive flame retardant for diglycidyl ether of bisphenol A (DGEBA)/methyl tetrahydrophthalic anhydride (MeTHPA) cured system. The thermal, mechanical and flame retardant properties of the cured epoxy resins were examined. The glass transition temperature (T-g) of the cured epoxy resins decrease with the increasing of the HP-1001-COOH content. The mechanical properties of cured films were slightly affected, although the crosslinking density decreases with the incorporation of HP-1001-COOH. The onset decomposition temperatures and the maximum-rate decomposition temperatures decrease, while the char yields increase with the increase of the phosphorus content. When the mass fraction of HP-1001-COOH is 30 wt%, the epoxy thermosets reaches a LOI value of 32.4% and successfully pass UL-94 V-0 rating. The heat release rate (HRR), peak heat release rate (P-HRR), total heat release (THR), average of effective heat of combustion (AvEHC) and total smoke production (TSP) of the flame retardant epoxy resins decrease significantly compared with neat epoxy resin. The macro-morphology and micro-morphology of the residues after cone calorimeter tests show that the flame retardant epoxy thermosets compact char layers are formed to prevent the transmission of heat and gases during combustion process, and the main structure in the char residues of the phosphorus-containing epoxy resins are polyaromatic carbons and phosphate esters. (C) 2016 Elsevier Ltd. All rights reserved.