中国塑料 ›› 2021, Vol. 35 ›› Issue (12): 94-101.DOI: 10.19491/j.issn.1001-9278.2021.12.016

• 助剂 • 上一篇    下一篇

2⁃苯甲酰苯甲酸镧对PVC热稳定作用的影响

黄旭博1,2,3, 柳召刚1,2,3(), 赵金钢1,2,3, 杨羽轩1,2,3, 陈明光1,4, 吴锦绣1,2,3, 胡艳宏1,2,3, 冯福山1,2,3   

  1. 1.内蒙古科技大学材料与冶金学院,内蒙古 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,内蒙古 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,内蒙古 包头 014010
    4.包头稀土研究院,内蒙古 包头 014010
  • 收稿日期:2021-05-31 出版日期:2021-12-26 发布日期:2021-12-22

Effect of lanthanum 2⁃benzoyl benzoate on thermal stability of PVC

HUANG Xubo1,2,3, LIU Zhaogang1,2,3(), ZHAO Jingang1,2,3, YANG Yuxuan1,2,3, CHEN Mingguang1,4, WU Jinxiu1,2,3, HU Yanhong1,2,3, FENG Fushan1,2,3   

  1. 1.School of Materials and Metallurgy,Inner Mongolia University of Science & Technology,Baotou 014010,China
    2.Key Laboratory of Green Extraction &Efficient Utilization of Light Rare?Earth resources Ministry of Education,Baotou 014010,China
    3.Inner Mongolia Key Laboratory of Rare Earth Hydrometallurgy and Light Rare Earth Application,Baotou 014010,China
    4.Baotou Research Institute of Rare Earth,Baotou 014010,China
  • Received:2021-05-31 Online:2021-12-26 Published:2021-12-22
  • Contact: LIU Zhaogang E-mail:liuzg65@163.com

摘要:

合成了一种新型稀土热稳定剂2?苯甲酰苯甲酸镧(LBA),通过红外光谱分析、热分析、元素分析等方法对其进行了表征,并采用刚果红实验、高温热老化实验和拉伸性能实验,研究了配合物对聚氯乙烯(PVC)热稳定性能和力学性能的影响;同时将其与几种传统热稳定剂进行复配,研究了复合热稳定剂对PVC热稳定性能和力学性能的影响。结果表明,2?苯甲酰苯甲酸镧的分子式为La(C14H9O33·2H2O;当配合物单独作PVC热稳定剂使用时,热稳定时间为16 min,初期抗变色效果一般,但力学性能优异;当配合物与硬脂酸锌和季戊四醇复配比为1∶1∶3(质量比,下同)时,热稳定时间长达58 min,抗变色效果和力学性能最好,三者具有优异的协同效果;2?苯甲酰苯甲酸镧能吸收PVC分解产生的HCl气体,生成LaCl3,减缓了PVC的降解。

关键词: 2?苯甲酰苯甲酸镧, 聚氯乙烯, 热稳定剂, 稀土, 合成

Abstract:

A new type of rare?earth heat stabilizer, lanthanum 2?benzoylbenzoate (LBA), was synthesized and characte?rized with FTIR, thermal analysis, and elemental analysis. The results indicated that the molecular formula of lanthanum 2?benzoylbenzoate was determined to be La(C14H9O33·2H2O. The PVC compounds exhibited a heat?stabilization time of 16 min when using this complex heat stabilizer alone, indicating a general initial anti tarnishing effect. However, the PVC compounds presented excellent mechanical properties. When the mass ratio of the complex heat stabilizer to zinc stearate and pentaerythritol was set as 1∶1∶3, the thermal stability time rose to 58 min, and the PVC compounds exhibited optimal anti?tarnishing effect and mechanical properties. Lanthanum 2?benzoylbenzoate can absorb HCl gas from the thermal decomposition of PVC to form LaCl3, reducing the thermal degradation of PVC.

Key words: lanthanum 2?benzoylbenzoate, poly(vinyl chloride), thermal stabilizer, rare earth, synthesis

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