摘要
以淀粉作为膨胀阻燃体系中的成炭剂 ,取代或部分取代了膨胀型阻燃剂 (IFR)中的季戊四醇 (PER) ,研究了淀粉对膨胀阻燃剂及其与线性低密度聚乙烯 (L LDPE)膨胀体系的热降解行为 (TGA)和阻燃性。研究表明 ,聚磷酸铵 (APP)可明显地改变淀粉的热降解行为促进成炭 ;尽管淀粉可提高 IFR的成炭量和膨胀体系的膨胀倍数 ,但它却在一定程度上降低了 LLDPE的膨胀体系的阻燃性 ,也即是降低了极限氧指数 (LOI)和提高了热释放速率峰值(pk-HRR) ,而用淀粉部分取代 PER,对其阻燃性很小 ,可用淀粉部分取代 PER作为膨胀体系中的成炭剂。
Starch is one of most abundantly natural macromolecule containing polyhydroxyl group. In this paper, starch was used as a char forming agent to all or partly replace pentaerythitol in Intumescent Flame Retardants(IFR), and investigated to effect on thermal degradation and flame retardancy of polyethylene intumescent system. It is shown that ammonium polyphosphates(APP) can change the path of thermal degradation of starch and promote it to form char. Even though starch increases ability of char forming and intumescenting of IFR in LLDPE, it lowers flame retardancy of LLDPE/IFR because of decreasing LOI and increasing peak heat release rate(pk HRR). When PER is partly replaced, starch gives slightly effect to flame retardancy of IFR.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2000年第2期155-157,共3页
Polymer Materials Science & Engineering
基金
黑龙江省自然科学基金
