多功能稀土促进剂(La-GDTC)的制备及其硫化性能研究  

Preparation of a Multi-Functional Rare Earth Accelerator(La-GDTC) and Its Rubber Accelerating Vulcanization Property

作　　者：杨树颜[1] 贾志欣[2] 刘岚[2] 贾德民[2] 罗远芳[2] 

机构地区：[1]东莞理工学院广东高校化工清洁生产与绿色化学品工程技术开发中心,广东东莞523808 [2]华南理工大学材料科学与工程学院,广东广州510640

出　　处：《中国稀土学报》2014年第5期611-618,共8页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金项目(51003031;51303026);"十二五"国家科技支撑计划项目(2012BAE01B03)资助

摘　　要：通过谷氨酸、二硫化碳和氯化镧合成了一种新型的多功能硫化促进剂——谷氨酸二硫代氨基甲酸镧(La-GDTC),利用紫外-可见吸收光谱、核磁共振13C谱、元素分析、红外光谱(FTIR)和X射线光电子能谱(XPS)等分析手段证实了La-GDTC中的二硫代氨基甲酸根和羧酸根与镧离子形成了配位络合结构。通过研究SBR/La-GDTC混炼胶的硫化性能,结果显示随着La-GDTC加入量的增多,SBR/La-GDTC混炼胶的正硫化时间(tc90)从17.23 min减少至12.47 min,证实了La-GDTC的加入能够很好地促进橡胶的硫化,这与SBR/La-GDTC混炼胶的活化能计算结果是一致的。A novel multi-functional rubber accelerator, lanthanum glutamic dithio-carbamate （La-GDTC）, was synthesized through glutamic acid, carbon bisulfide and lanthanum chloride and was characterized by UV-visible absorption spectroscopy, 13C-NMR, element analysis, Fourier transform infrared spectroscopy （FTIR） and X-ray photoelectron spectroscopy （XPS）. The results showed that the dithio-carbamate group and carboxyl group can re- act with lanthanum ion through coordination bonds to form a coordination-complex structure. As the content of La- GDTC increased, the optimum time （To90） of SBR/La-GDTC compounds decreased from 17.23 to 12.47 min, in- dicating a good rubber vulcanization accelerating property of La-GDTC, which was also supported by variation tend- ency of activate energies of SBR/La-GDTC compounds.

关 键 词：促进剂 丁苯橡胶 硫化 稀土 

分 类 号：TQ330.38[化学工程—橡胶工业]