摘要
利用锥形量热仪 (CONE)在 5 0 k W/ m2 热辐照条件下 ,并配合 TG和极限氧指数 (L OI)对含淀粉膨胀阻燃聚丙烯 (PP)体系的阻燃和烟释放进行了研究。通过对获得的最大热释放速率 (pk- H RR)、总热释放 (TH R)、有效平均燃烧热 (av- EH C)、最大烟产生速率 (pk- SPR)、总烟释放量 (TSP)、平均比消光面积 (av- SEA )及质量损失速度(ML R)等参数和 TG曲线及 L OI的分析表明 ,含淀粉膨胀阻燃剂 (S- IFR)能明显地降低 PP的 pk- H RR、TH R和av- EH C,表现了良好的阻燃作用 ,淀粉可以部分代替季戊四醇 (PER)作为膨胀型阻燃剂中的成炭剂 ,而不影响其阻燃性。该膨胀体系对烟释放速率有抑制作用 ,但却明显增加了烟释放总量。该体系形成的膨胀炭层使 PP热降解速度明显降低 ,这是降低 H RR和 SPR的关键。 TG实验也说明 S- IFR对
The flame retadance, smoke emission and thermal degradation behavier of starch containing intumescent flame retarded polypropylene were studied using Cone Calorimeter, TG and LOI . Experimental parameters derived from cone calorimeter at 50 kW/m 2, such as peak heat release rate(pk HRR ), total heat release( THR ), average effective heat of combustion(av EHC ), peak smoke production rate(pk SPR ), total smoke production( TSP ), average specific extinction area( SEA ), mass loss rate( MLR ), and TG curves and LOI data, etc., had been reported in this paper. These experimental data show following results: 1) starch containing intumescent flame retardants(S IFR) still gives good flame retardance in PP when starch partially replaces pentaerythitol(PER). 2)S IFR obviously lowers SPR , however, increases TSP . 3) intumescent char coating formed from PP/S IFR prohibits thermal degradation of PP, which is one of most important factors to affect flame retardance and moke emission of PP. 4) TG data also shows that S IFR slightly stabilizes PP.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2000年第5期146-149,共4页
Polymer Materials Science & Engineering
基金
黑龙江省自然科学基金资助项目
关键词
聚丙烯
淀粉
膨胀阻燃剂
阻燃
烟释放
PP
starch
intumescent flame retardant
flame retardance
smoke emission
