首页|CaZnAl-CO3三元层状双氢氧化物的合成及其在聚氯乙烯树脂热稳定性中的应用

CaZnAl-CO3三元层状双氢氧化物的合成及其在聚氯乙烯树脂热稳定性中的应用

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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.
Synthesis of CaZnAl-CO3 ternary layered double hydroxides and its application on thermal stability of poly (vinyl chloride) resin
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.

CaZnAl-CO3-LDHssynergistic effectsthermal stabilitypoly vinyl chloride

曾笑、杨占红

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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

CaZnAl-CO3-LDHs 协同效应 热稳定性 聚氯乙烯

ProjectNational Natural Science Foundation of China ProjectScience and Technology Project of Changsha City, China ProjectSpecialized Research Fund for the

21371180K1303015-1120130162110018

2020

中南大学学报(英文版)
中南大学

中南大学学报(英文版)

CSTPCDCSCDSCIEI
影响因子：0.47
ISSN：2095-2899
年,卷(期)：2020.27(3)
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