Preparation of Cerium 2-Aminonicotinate Acid Rare Earth Stabilizer and Influence on PVC Thermal Stability

被引：0
|
作者：
Yang Y. [1 ,2 ]
Du G. [1 ,2 ]
Liu Z. [1 ,2 ]
Zhao J. [1 ,2 ]
Chen M. [1 ,3 ]
Hu Y. [1 ,2 ]
Wu J. [1 ,2 ]
Feng F. [1 ,2 ]
机构：
[1] School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou
[2] Key Laboratory of Rare Earth Hy⁃ drometallurgy and Light Rare Earth Application of Inner Mongolia Autonomous Region, Key Laborato⁃ ry of Green Extraction and Efficient Utilization of LREE Resources, Ministry of Education, Baotou
[3] Baotou Research Institute of Rare Earth, Baotou
来源：
Zhongguo Xitu Xuebao/Journal of the Chinese Rare Earth Society | 2023年 / 41卷 / 06期
关键词：
apparent activation energy of degradation; cerium 2-aminonicotinate acid; polyvinyl chloride; synergistic effect; thermal stability mechanism;
D O I：
10.11785/S1000-4343.20230617
中图分类号：
学科分类号：
摘要：
Cerium 2-aminonicotinate acid was synthesized from 2-aminonicotinic acid，cerium nitrate and sodi‑ um hydroxide. The molecular formula was determined to be Ce（C6H5N2O2）3∙3H2O by infrared analysis，thermal analysis and other characterization methods. The thermal stability of 2-CANA was studied through static thermal stability experiments，and then compared with the thermal stability of other thermal stabilizers. 2-CANA was compounded with zinc stearate（ZnSt2）and pentaerythritol（PE）in one or more ways to explore the thermal sta‑ bility of its compound heat stabilizer. When 2-CANA∶ZnSt2∶PE is 2∶1∶2，the longest static thermal stability time is 51 min. when 2-CANA∶ZnSt∶2 PE is 1∶1∶3，its anti-discoloration performance is the best；When 2-CANA ∶ZnSt∶2 PE is 2∶1∶2，the dynamic thermal stability time is 40.79 min，and the Ea is the highest，indicating that it has strong synergistic effect，which can more effectively inhibit the occurrence of PVC degradation reaction and weaken the degradation ability of PVC；When 2-CANA∶ZnSt2∶PE is 2∶1∶2，its rheological and mechanical properties are the best. 2-CANA can effectively absorb the HCl gas released by PVC during thermal degradation and generate CeCl3，which can effectively prevent the fracture of C-Cl on PVC chain and C-H connected with chlorine，reduce the generation of conjugated double bonds，slow down the discoloration of PVC，inhibit the generation of HCl，and delay the thermal degradation of PVC to a certain extent. © 2023 Chinese Society of Rare Earths. All rights reserved.
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页码：1166 / 1176
页数：10
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