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通过极限氧指数(LOI)和垂直燃烧(UL-94),对比分析了十二烷基硫酸钠改性双羟基氧化物(SDS-LDH)和十六烷基三甲基溴化铵改性蒙脱土(CTAB-MMT)协同聚磷酸铵(APP)对聚(丙烯酸丁酯-醋酸乙烯酯)(P(BA-VAc))胶膜阻燃效果的异同.当APP添加量为14.5 wt%,层状无机粒子引入量为0.5 wt%时,P(BA-VAc)/APP/SDS-LDH和P(BA-VAc)/APP/CTAB-MMT的最佳LOI值分别为30.5和30.1.通过热分析法(TGA)探讨了阻燃型复合材料的热降解行为.700℃时,P(BA-VAc)/14.5%APP/0.5%SDS-LDH比P(BA-VAc)/14.5%APP/0.5%CTAB-MMT的残留量高2.7%.采用扫描电镜(SEM)观察复合材料LOI测试后炭层微观形貌.与P(BA-VAc)/15%APP复合材料相比,P(BA-VAc)/14.5%APP/0.5%SDS-LDH和P(BA-VAc)/14.5%APP/0.5%CTAB-MMT燃烧后炭层的外表面更加致密,并且连续性更好.通过傅里叶变化红外(FTIR)和X-射线光电子能谱(XPS)对阻燃材料500℃热氧化炭层进行了分析.SDS-LDH和CTAB-MMT均可促进更多酯化反应和脱水反应发生;相比而言,SDS-LDH具有较好的催化协同成炭效果.
By the limiting oxygen index (LOI) and vertical combustion (UL-94), sodium dodecyl sulfate modified dihydroxy oxide (SDS-LDH) and cetyl trimethyl ammonium bromide modified Similarities and differences of flame retardancy between CTAB-MMT and ammonium polyphosphate (APP) on poly (butyl acrylate-vinyl acetate) (P (BA-VAc) The optimum LOI values for P (BA-VAc) / APP / SDS-LDH and P (BA-VAc) / APP / CTAB- MMT were 30.5 and 30.1, respectively, at 0.5wt% layered inorganic particle loading. (BA-VAc) /14.5%APP/0.5%SDS-LDH than P (BA-VAc) /14.5%APP/0.5 The residual amount of% CTAB-MMT was 2.7% higher than that of P (BA-VAc) / 15% APP composites. The scanning electron microscopy (SEM) ) /14.5%APP/0.5%SDS-LDH and P (BA-VAc) /14.5%APP/0.5%CTAB-MMT The outer surface of the burned carbon layer is denser and more continuous. By Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) were used to analyze the thermal oxidized carbon layer of flame-retardant material at 500 ℃ .SDS-LDH and CTAB-MMT can promote more esterification reaction and off Reaction; In contrast, SDS-LDH having better catalytic synergistic charring.