含磷硅高分子阻燃剂与聚磷酸铵对EVA的协效阻燃作用

摘要

A phosphorus-silicon compound （EMPZR） and ammonium polyphosphate （APP） were used as an intumescent flame retardant in poly（ethylene-co-vinyl acetate）（EVA）. It was found that when the loading of intumescent flame retardant was 40% （APP ： EMPZR= 1 ： 1）, the limiting oxygen index reached 28. 6 %, and the burning grading reached UL-94 V-0; the tensile strength was 6. 4 MPa, and the elongation at break was 592 %. TG showed that the char yield was 15% at 800℃. The synergistic effects of EMPZR and APP were studied by SEM and FT-IR.%研究了聚酯型磷-硅无卤阻燃剂（EMPZR）与聚磷酸铵（APP）对乙烯-醋酸乙烯酯共聚物（EVA）阻燃及力学性能的影响。结果表明，添加40％（质量分数，下同）的由EMPZR和APP所组成的复合阻燃剂得到的阻燃EVA材料极限氧指数达到28．6％，垂直燃烧测试达到UL94 V-0级，拉伸强度为6．4MPa，断裂伸长率达592％；热失重分析测试表明，阻燃EVA材料的热失重速率较纯EVA有明显下降；成炭率显著提高，阻燃EVA在800℃时残炭量为15％，纯EVA仅为0．2％；扫描电子显微镜及红外图谱分析表明，EMPZR与APP在EVA中具有协效阻燃作用。