哌啶类稀土稳定剂的制备及对PVC的作用  

Preparation of Piperidine Rare Earth Stabilizer and Its Function on PVC

作　　者：杨羽轩 柳召刚[1,2,3] 赵金钢 黄旭博 陈明光 胡艳宏 吴锦绣[1,2,3] 冯福山 YANG Yu-xuan;LIU Zhao-gang;ZHAO Jin-gang;HUANG Xu-bo;CHEN Ming-guang;HU Yan-hong;WU Jin-xiu;FENG Fu-shan(School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou 014010,China;Key Laboratory of Green Extraction and Efficient Utilization of LREE Resources,Ministry of Education,Baotou 014010,China;Key Laboratory of Rare Earth Hydrometallurgy and Light Rare Earth Application of Inner Mongolia Autonomous Region,Baotou 014010,China;Baotou Research Institute of Rare Earth,Baotou 014030,China)

机构地区：[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]内蒙古自治区包头稀土研究院,包头014030

出　　处：《高分子通报》2022年第12期121-128,共8页Polymer Bulletin

基　　金：新型稀土热稳定剂的设计、制备及相关机理研究(51564040);内蒙古自然科学基金项目(2022LSM05022)。

摘　　要：以异哌啶酸、硝酸镧、氨水为原料合成异哌啶酸镧,经傅里叶红外光谱分析(FTIR)、元素分析、热分析(TG-DSC)等表征手段,确定其分子式为La(C_(6)H_(11)NO_(2))_(3)(NO_(3))_(3)·H_(2)O。将异哌啶酸镧与常用热稳定剂进行热稳定性能的比较。为了使异哌啶酸镧的热稳定性进一步提高,将异哌啶酸镧与硬脂酸锌、季戊四醇进行二元复配和三元复配。当异哌啶酸镧∶硬脂酸锌∶季戊四醇的复配质量比为2∶1∶2时,其热稳定时间为42min,并且抗变色性有较大提高。异哌啶酸镧可以吸收聚氯乙烯(PVC)降解产生的Cl^(-),与稀土离子结合生成LaCl_(3),从而抑制PVC的降解,达到热稳定的效果。Lanthanum isonipecotic acid is synthesized from isonipecotic acid,Lanthanum nitrate,hexahydrate and aqueous ammonia.The molecular formula is determined to be La(C_(6)H_(10)NO_(2))_(3)(NO_(3))_(3)·H_(2)O by Fourier infrared spectra analysis(FTIR),elemental analysis,and thermogravimetric analysis(TG-DSC).The heat stability of lanthanum isonipecotic acid is compared with that of common heat stabilizers.In order to further improve the heat stability of lanthanum isonipecotic acid,it was compounded with zinc stearate and pentaerythritol in binary and ternary combinations.When the ratio of lanthanum isonipecotic acid/zinc stearate/pentaerythritol is 2/1/2,the heat stability time is 42min,and the anti-tarnishing property has been greatly improved.Lanthanum isonipecotic acid can absorb Cl^(-)produced by poly(vinyl chloride)(PVC)degradation and combine with rare earth ions to form LaCl3,thus inhibiting the degradation of PVC and achieving the effect of heat stability.

关 键 词：异哌啶酸镧 热稳定剂 聚氯乙烯 稀土 热稳定机理 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业]