2-苯甲酰苯甲酸镧对PVC热稳定作用的影响  

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

作　　者：黄旭博 柳召刚[1,2,3] 赵金钢 杨羽轩 陈明光 吴锦绣 胡艳宏[1,2,3] 冯福山 HUANG Xubo;LIU Zhaogang;ZHAO Jingang;YANG Yuxuan;CHEN Mingguang;WU Jinxiu;HU Yanhong;FENG Fushan(School of Materials and Metallurgy,Inner Mongolia University of Science&Technology,Baotou 014010,China;Key Laboratory of Green Extraction&Efficient Utilization of Light Rare-Earth resources Ministry of Education,Baotou 014010,China;Inner Mongolia Key Laboratory of Rare Earth Hydrometallurgy and Light Rare Earth Application,Baotou 014010,China;Baotou Research Institute of Rare Earth,Baotou 014010,China)

机构地区：[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

出　　处：《中国塑料》2021年第12期94-101,共8页China Plastics

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(C_(14)H_(9)O_(3))_(3)·2H_(2)O;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LaCl_(3),减缓了PVC的降解。A new type of rare-earth heat stabilizer,lanthanum 2-benzoylbenzoate(LBA),was synthesized and characterized with FTIR,thermal analysis,and elemental analysis.The results indicated that the molecular formula of lanthanum 2-benzoylbenzoate was determined to be La(C_(14)H_(9)O_(3))_(3)·2H_(2)O.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 LaCl_(3),reducing the thermal degradation of PVC.

关 键 词：2-苯甲酰苯甲酸镧 聚氯乙烯 热稳定剂 稀土 合成 

分 类 号：TQ314.254.1[化学工程—高聚物工业]