[1]赵金钢,范俊伟,柳召刚,等.6-甲基尿嘧啶镧对PVC热稳定性的影响[J].高分子通报,2022,(09):42-51.[doi:10.14028/j.cnki.1003-3726.2022.09.006]
 ZHAO Jin-gang,FAN Jun-wei,LIU Zhao-gang,et al.Effect of 6-Methyluracil Lanthanum on Thermal Stability of PVC[J].POLYMER BULLETIN,2022,(09):42-51.[doi:10.14028/j.cnki.1003-3726.2022.09.006]
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6-甲基尿嘧啶镧对PVC热稳定性的影响()
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《高分子通报》[ISSN:1003-3726/CN:11-2051/O6]

卷:
期数:
2022年09期
页码:
42-51
栏目:
出版日期:
2022-09-20

文章信息/Info

Title:
Effect of 6-Methyluracil Lanthanum on Thermal Stability of PVC
作者:
赵金钢123 范俊伟123 柳召刚123 陈明光14 黄旭博123 杨羽轩123 胡艳宏123 吴锦绣123
1. 内蒙古科技大学材料与冶金学院, 包头 014010;
2. 轻稀土资源绿色提取与高效利用教育部重点实验室, 包头 014010;
3. 内蒙古自治区稀土湿法冶金与轻稀土应用重点实验室, 包头 014010;
4. 包头稀土研究院, 包头 014010
Author(s):
ZHAO Jin-gang123 FAN Jun-wei123 LIU Zhao-gang123 CHEN Ming-guang14 HUANG Xu-bo123 YANG Yu-xuan123 HU Yan-hong123 WU Jin-xiu123
1. School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, China;
2. Key Laboratory of Green Extraction and Efficient Utilization of LREE Resources, Ministry of Education, Baotou 014010, China;
3. Key Laboratory of Rare Earth Hydrometallurgy and Light Rare Earth Application of Inner Mongolia Autonomous Region, Baotou 014010, China;
4. Baotou Rare Earth Research Institute, Baotou 014010, China
关键词:
稀土聚氯乙烯热稳定性能6-甲基尿嘧啶镧复配
Keywords:
Rare earthPolyvinyl chlorideThermal stability6-Methyluracil lanthanumCompound
DOI:
10.14028/j.cnki.1003-3726.2022.09.006
文献标志码:
A
摘要:
用复分解法,以硝酸镧、6-甲基尿嘧啶(MUA)、氨水为原料制备了6-甲基尿嘧啶镧(LMUA),利用红外光谱、热分析和元素分析对产物进行表征,确定其分子式为La (C5H4N2O2) NO3·1.5H2O。通过刚果红试纸法、高温老化实验和电导率实验,研究了LMUA对聚氯乙烯(PVC)的热稳定性能的影响,结果表明,LMUA单独作为PVC热稳定剂时,其热稳定性和抗变色性出色,静态热稳定时间达到了73min,动态热稳定时间为88min。将LMUA与其他热稳定剂联合进行二元和三元复配,产物的协同作用良好,稳定性有所提升。当复合稳定剂按质量比6-甲基尿嘧啶镧:硬脂酸钙:季戊四醇=3:1:1进行复配时,静态热稳定间达到88min,抗变色性和热稳定性最佳。LMUA可以与PVC降解过程中产生的HCl反应而生成LaCl3,降低了HCl对PVC降解的催化作用,从而达到增强PVC热稳定性能的目的。
Abstract:
Using the double replacement reaction, lanthanum nitrate, 6-methyluracil (MUA), and ammonia water were used as raw materials to prepare 6-methyluracil lanthanum (LMUA). The product was characterized by infrared spectroscopy, thermal analysis and elemental analysis. The molecular formula is determined to be La(C5H4N2O2)NO3·1.5H2O. Through the Congo red experiment, high temperature aging experiment and electrical conductivity experiment, the effect of LMUA on the thermal stability of PVC was studied. The results showed that when LMUA alone was used as a heat stabilizer for PVC, its thermal stability and discoloration resistance performed excellent, the static thermal stability time reached 73min, and the dynamic thermal stability time reached 88min. Combining LMUA and other heat stabilizers for binary, ternary and quaternary compounding, not only the synergy of the product was good, but also the stability was improved. When the composite stabilizer is compounded according to the mass ratio of LMUA:CaSt2:pentaerythritol = 3:1:1, the static thermal stability interval reaches 88min, and the discoloration resistance and thermal stability are the best. The light stability was analyzed by ultraviolet absorption spectrophotometry, which preliminarily verified that LMUA has light stabilization effect. LMUA can react with the HCl generated during the degradation of PVC to generate LaCl3, which reduces the catalytic effect of HCl on the degradation of PVC, thereby achieving the purpose of enhancing the thermal stability of PVC.

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备注/Memo

备注/Memo:
收稿日期:2021-05-14;改回日期:2022-01-28。
基金项目:国家自然科学基金项目(51634005)
通讯作者:柳召刚,教授。E-mail:liuzg65@163.com.
更新日期/Last Update: 2022-08-19