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用成核-晶化隔离法制备了MgAl-CO3-LDHs,借助于TG-DSC、IR、XRD、SEM对其结构和形貌进行了表征。通过热老化箱实验研究了季戊四醇对PVC镁铝水滑石钙锌皂热稳定系统(Mg0.677Al0.323-CO3-LDHs/Ca(st)2/Zn(st)2)的增效性。结果表明,快速成核的等量盐、碱混合液,在100℃下回流晶化6h所得的水滑石Mg0.677Al0.323-CO3-LDHs为规整的层状晶体结构,层间距0.7455nm、晶轴a=0.3038nm、c=2.2365nm,在ac、方向的一次性晶粒分别是14nm和25.7nm。层间结晶水、层板羟基和层间阴离子CO32-脱除温度分别是249.5℃和422.1℃;含适量季戊四醇的热稳定剂系统较不含季戊四醇的初期着色和热稳定时间延长50min,分别达260min和290min。
MgAl-CO3-LDHs was prepared by nucleation-crystallization isolation method. The structure and morphology of MgAl-CO3-LDHs were characterized by TG-DSC, IR, XRD and SEM. The synergistic effect of pentaerythritol on the thermostable calcium-aluminum-zinc soap soap system (Mg0.677Al0.323-CO3-LDHs / Ca (st) 2 / Zn (st) 2) The results show that the hydrotalcite Mg0.677Al0.323-CO3-LDHs obtained by the rapid nucleation of an equal amount of salt and alkali mixture and reflowed at 100 ℃ for 6h have a regular layered crystal structure with a layer spacing of 0.7455nm and a crystal Axis a = 0.3038nm, c = 2.2365nm, in the ac, direction of the disposable crystal were 14nm and 25.7nm. The temperature of CO32- removal between interlayer water, interlayer hydroxyl and interlayer anion were 249.5 ℃ and 422.1 ℃, respectively. The initial coloring and heat-stabilization time of pentaerythritol-containing heat stabilizer system with suitable amount of pentaerythritol was prolonged by 50 min to 260 min And 290 min.