私密直播全婐app免费大渔直播,国产av成人无码免费视频,男女同房做爰全过程高潮,国产精品自产拍在线观看

當(dāng)前位置:> 首頁(yè) > 論文著作 > 正文
Application of waste silicon rubber composite treated by N2 plasma in the flame retardant polypropylene
作者:Zhang Y, He SL, Wu JN, Ma JJ, Shao SD, He LJ, Li XN, Fang ZP*, Cao HW, Xi ZC
關(guān)鍵字:silicon rubber, plasma,flame retardant,polypropylene
論文來(lái)源:期刊
具體來(lái)源:J. Appl. Polym. Sci., 2019.12, 136: 48187
發(fā)表時(shí)間:2019年

The waste silicon rubber composite insulator (WSiRC) was applied along with ammonium polyphosphate (APP) and pentaerythritol (PER) to improve the flame retardancy of polypropylene (PP) in this study. Considering the compatibility among PP, WSiRC, and flame-retardant additives, WSiRC was treated by acid and N2 plasma to obtain the plasma-treated WSiRC (PLSiR), which decreases the amount of the inorganic additive and grafts amino groups onto the surface of the silicon rubber. The infrared spectrocopy (IR), scanning electron microscopy (SEM), and thermal gravimetric analysis (TGA) confirm that NH2 groups have been grafted onto the surface of PLSiR. The TGA data also show that PLSiR had the char improving ability and promote the crosslink of APP, which results in its promotion for the flame retartancy of PP proved by the data of limiting oxygen index (LOI), UL94 rating and cone tests. It is also showed that PLSiR is superior than the WSiRC treated only by acid (ASiR) due to the differences in the structure and polarity. Moreover, the improvement of PLSiR on the flame retardancy of PP is dependent on its amounts. It is indicated that the 1 wt % loading of PLSiR in PP with APP and PER has the highest LOI value of 30.9 and reached UL94 rating V-0. The peak heat release rate (pHRR) and total heat release (THR) values are also decreased by 68.7 and 15%, respectively. SEM and Raman results show the condensed mechanism is ascribed to the PP/APP-PER/PLSiR system because the quality of char affect the flame retardancy of PP.


主站蜘蛛池模板: 呈贡县| 龙岩市| 醴陵市| 西盟| 繁昌县| 雅江县| 察雅县| 庆阳市| 米脂县| 积石山| 措美县| 阳谷县| 封开县| 临朐县| 余江县| 浦江县| 河间市| 黄山市| 勃利县| 财经| 攀枝花市| 长阳| 安塞县| 德保县| 蚌埠市| 祥云县| 阳信县| 木里| 吴川市| 辽宁省| 铜鼓县| 怀柔区| 宜宾县| 丰县| 武定县| 浮梁县| 伽师县| 青州市| 武功县| 闸北区| 林州市|