摘要
选用丙烯酸接枝聚丙烯(PP-g-AA)、马来酸酐接枝聚丙烯(PP-g-MAH)及N-羟甲基丙烯酰胺接枝聚丙烯(PP-g-NMAM)3种相容剂来改善聚磷酸铵/季戊四醇膨胀型阻燃剂(IFR)与聚丙烯的相容性。力学性能和扫描电镜(SEM)分析结果表明,PP-g-MAH/PP/IFR具有较好的相容性及力学性能,能较好地解决阻燃剂在聚丙烯体系中的团聚现象。氧指数(LOI)和垂直燃烧UL94测试结果表明,相容剂的加入对PP/IFR体系的燃烧性能影响不大,PP-g-MAH效果最佳,加入10%的PP-g-MAH,IFR的含量为30%时,LOI达到32.8%,UL94测试达到V-0级。热分析发现,季戊四醇和聚磷酸铵是通过酯化反应成炭而形成一层保护膜,保护膜起到隔热隔氧的作用而阻燃。
Ammonium polyphosphate(APP) and pentaerythritol (PER) were chosen as the intumescent flame retardant(IFR) in this paper. Acrylic acid grafted polypropylene(PP-g-AA), maleic anhydride grafted polypropylene (PP-g-MAH) and N-hydroxymethyl acrylamide grafted polypropylene (PP-g-NMAM) were selected as the compatilizer to improve the compatibility of IFR/PP composites. The SEM results show that PP-g-MAH/PP/IFR is an effective coupling agent for PP/IFR blends. When the content of the PP-g-MAH reaches 10%, the limiting oxygen index (LOI) of the PP/APP/PER system is 32.8 %, and the UL-94 reaches V-0 rating. However, it did not improve the flame retardancy. The results of thermal analysis indicate that the reaction of APP and PER can form the char layer to block the transfer of the heat and the oxygen.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2013年第2期90-93,98,共5页
Polymer Materials Science & Engineering
基金
上海市重点学科和重点实验室项目资助(B502
08DZ2230500)
关键词
相容剂
膨胀型阻燃剂
聚丙烯
接枝
compatilizer
intumescent flame retardant
polypropylene
grafting