三种有机锌盐促进剂对天然橡胶硫化的影响  

Effects of Three Zinc Salt Accelerators on Vulcanization of Natural Rubber

作　　者：林新花[1] 陈朝晖[1] 王迪珍[1] 

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2008年第11期153-156,161,共5页Journal of South China University of Technology(Natural Science Edition)

基　　金：广东省自然科学基金资助项目(05006563)

摘　　要：研究了二丁基二硫代氨基甲酸锌(BZ)、2-硫醇基苯并噻唑锌(MZ)和二丁基二硫代磷酸锌(ZnDBDP)3种有机锌盐对天然橡胶硫化的促进效果及硫化返原性,比较了硫化胶的力学性能;通过平衡溶胀法测定硫化胶的交联密度,用特殊化学试剂法测定多硫键含量,并对作用机理进行探讨.结果表明:BZ的硫化促进活性最高,返原程度最大;MZ的硫化促进活性最低,返原程度最小;ZnDBDP的硫化促进活性及返原程度居于二者之间;促进剂的离子性越强,硫化反应速率越快.The effects of three organic zinc salt accelerators, such as zinc dibutyl dithiocarbamate （ BZ）, zinc O,O′-dibutyldithiophosphate （ZnDBDP） and zinc dibenzothiazole disulphide （MZ）, on the curing characteristics and vulcanization reversion of natural rubber （NR） were investigated, and the mechanical properties of three vulcanizates respectively accelerated by the three kinds of salts were comparatively analyzed. Moreover, the crosslinking densities of the vulcanizates were determined by means of the equilibrium swelling method, and the content of polysulphidic cross-links in vulcanizates was detected via a special chemical reagent method. Finally, the mechanism of sulfur vulcanization catalyzed by the three accelerators was analyzed. The results show that both the catalysis and the reversion of ZnDBDP are greater than those of MZ but less than those of BZ, and that the stronger the ionization of accelerator, the more rapid the vulcanization.

关 键 词：天然橡胶 硫化 二丁基二硫代氨基甲酸锌 2-硫醇基苯并噻唑锌 二丁基二硫 代磷酸锌 促进剂 

分 类 号：TQ330.13[化学工程—橡胶工业]