多功能稀土配合物的制备及其在橡胶中的应用

发布时间：2018-09-03 18:18

【摘要】：传统的国产橡胶助剂与国外的产品在品质、环保性方面还存在着一定的差距,开发新型、环保、高效的橡胶助剂具有重要的意义。本论文利用稀土元素特殊性质,将二乙基二硫代氨基甲酸基团当作促进配体,以污染小、毒性低的受阻酚类防老剂的主要结构、抗氧化剂维生素C的异构体、抗氧化剂维生素E的水解产物为防老配体,在温和的实验条件下,按照不同的配体摩尔比合成了多种的双配体稀土配合物。利用FIIR、TGA、XRD、DSC等手段,表征了它们的组成和结构,确定了分子式。将这些稀土配合物用于丁苯橡胶中,进行了硫化性能测试、核磁交联密度测试、基本力学性能测试和热氧老化测试。实验表明,双配体稀土配合物既能够起到橡胶促进剂的功效,也能够起到防老剂的功效。对比来说,促进配体与防老配体摩尔比为4:2的综合效果最佳。选取功效最佳的两种配合物制备了炭黑胶和胎面胶,并计算了硫化过程中的活化能,测试了耐磨性、耐切割等性能。研究发现,其在硫化促进、耐热氧老化、物理机械性能上并不逊色于传统促进剂和防老剂的组合。
[Abstract]:There is still a certain gap between traditional domestic rubber auxiliaries and foreign products in quality and environmental protection. It is of great significance to develop new, environmentally friendly and efficient rubber auxiliaries. In this paper, the diethyldithiocarbamate group was used as the promoter ligands by using the special properties of rare earth elements, and the main structure of hindered phenolic antioxidants with little pollution and low toxicity, the isomer of antioxidant vitamin C, was used. The hydrolyzed product of antioxidant vitamin E is an antiaging ligand. Under mild experimental conditions, a variety of rare earth complexes with double ligands were synthesized according to different molar ratios of ligands. The composition and structure of these compounds were characterized by means of FIIR,TGA,XRD,DSC and the molecular formula was determined. These rare earth complexes were used in styrene-butadiene rubber (SBR). The vulcanization properties, NMR crosslinking densities, basic mechanical properties and thermal oxygen aging tests were tested. The experimental results show that the double ligand rare earth complexes can not only act as rubber accelerators but also as antioxidants. In contrast, the comprehensive effect of 4:2 molar ratio of promoting ligands to anti-aging ligands is the best. Carbon black rubber and tread rubber were prepared by two kinds of complexes with the best efficiency. The activation energy of vulcanization process was calculated and the wear resistance and cutting resistance were tested. It was found that the combination of vulcanization, heat and oxygen aging, physical and mechanical properties was not inferior to the combination of traditional accelerator and antioxidant.
【学位授予单位】：北京化工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O641.4;TQ330.38

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