β-二酮作用模式和锌基热稳定剂协同作用机理研究(上)  

Insights into Mode of Action of β-Diketones and Mechamism of Synergism in Zinc-based Heat Stabilizers(Part 1)

作　　者：吴茂英[1] 林悟森[1] 林莅萌[1] 

机构地区：[1]广东工业大学轻工化工学院,广州510006

出　　处：《塑料助剂》2010年第1期27-30,共4页Plastics Additives

摘　　要：研究和比较了β-二酮金属配合物和金属皂的热稳定效能,提出了聚氯乙烯(PVC)用锌基热稳定剂中β-二酮的作用模式,在此基础上提出锌基热稳定剂中β-二酮与锌皂协同作用的"多重交织可逆酸碱反应"机理。与传统的"交换再生"机理相比,该机理能从多方面揭示锌基热稳定剂热稳定效能的影响因素及规律性,并解释锌基热稳定剂协同作用现象。An idea of the mode of action ofβ-diketones in zinc-based heat stabilizers for poly （vinyl chloride） （PVC） was gained by investigating the heat stabilizing efficiencies of some metal diketonate complexes in comparison with the corresponding metal soaps. Based on this result, a mechanism of synergism in zinc- based heat stabilizers, refered as ＂multiply interweaved reversible acid-base reaction＂ mechanism, was put forward. By applying the new mechanism instead of the traditional ＂exchange-regeneration＂ mechanism, the influencing factors and regulations for heat stabilizing efficiencies of zinc-based heat stabilizers could be revealed more comprehensively and the synergetic phenomenons of more zinc-based heat stabilizer systems could be explained.

关 键 词：聚氯乙烯β-二酮 作用模式锌基热稳定剂 协同作用 机理 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业] O614.121[理学—无机化学]