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

• Additive • Previous Articles     Next Articles

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

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

CLC Number: