摘要
In this work,hydrothermal method was used to prepare the CaZnAl-CO3 ternary layered double hydroxides(CaZnAl-CO3-LDHs)with various Ca/Zn/Al molar ratios,which were characterized by X-ray diffraction(XRD),Fourier transform infrared spectroscope(FT-IR)and scanning electron microscopy(SEM)techniques.The obtained results demonstrate that the samples were well-crystallized and flake-structured.The CaZnAl-CO3-LDHs used alone for thermal stability of poly(vinyl chloride)(PVC)resin,with different Ca/Zn/Al molar ratios and varying additive amounts,were investigated through the tests such as static thermal aging,mass loss and congo red,respectively.The optimum Ca/Zn/Al molar ratio and additive amount were 3.6:0.4:2 and 5 phr(parts per hundred PVC resin),respectively.In addition,the synergistic effects of Ca3.6Zn0.4Al2-CO3-LDHs and CaSt2 were discussed in detail,showing better thermal stability compared with Ca3.6Zn0.4Al2-CO3-LDHs used alone,and the optimum additive amounts of Ca3.6Zn0.4Al2-LDHs and CaSt2 were 6 and 1.0 phr,respectively.
采用水热法制备了含不同Ca/Zn/Al摩尔比的CaZnAl-CO3三元层状双氢氧化物(CaZnAl-CO3-LDHs),并用X射线衍射(XRD)、傅立叶变换红外光谱(FT-IR)和扫描电镜(SEM)对其进行表征分析,其结果表明,合成的样品均呈现水滑石的片状结构且晶形良好。静态热老化实验、刚果红法和紫外可见光谱测试等分析结果表明,当将CaZnAl-CO3-LDHs单独用于聚氯乙烯(PVC)热稳定剂时,最佳Ca/Zn/Al摩尔比为3.6:0.4:2,最佳添加量为5份。在此基础上进一步研究了Ca3.6Zn0.4Al2-CO3-LDHs和硬脂酸锌(CaSt2)复配对PVC热稳定性能的协同效应,结果表明,复配体系的热稳定性能优于单独使用Ca3.6Zn0.4Al2-CO3-LDHs,Ca3.6Zn0.4Al2-LDHs和CaSt2的最佳添加量分别为6份和1份。
作者
ZENG Xiao
YANG Zhan-hong
曾笑;杨占红(College of Chemistry and Chemical Engineering,Central South University,Changsha 410083,China;Kunming Training Crops,Fire and Rescue Bureau,Ministry of Emergency Management,Kunming 650208,China)
基金
Project(21371180)supported by the National Natural Science Foundation of China
Project(K1303015-11)supported by the Science and Technology Project of Changsha City,China
Project(20130162110018)supported by the Specialized Research Fund for the Doctoral Program of Higher Education,China。
