【摘要】 甲基丙烯酸缩乙二醇双酯,作为一种双官能基单体,是配制厌氧胶的主要组分,本文研究了室温和70±2℃下甲基丙烯酸二缩三乙二醇双酯(双酯)的氧化,以及DMT、CHPO、糖精、对苯二酚、草酸、铜离子等对双酯氧化的影响,发现DMT、铜离子明显加速双酯氧化,而对苯二酚、草酸抑制双酮氧化,与DMT共存时,糖精对氧化亦起加速作用。 此外,本文研究了厌氧胶与吸氧的关系,发现厌氧胶是一个不断吸氧的体系,厌氧胶中各组分对双酯吸氧与稳定性的影响与它们对双酯氧化的影响基本上是平行的,即DMT与铜离子促进双酯吸氧并降低稳定性,草酸抑制吸氧并增加稳定性,CHPO和糖精对双酯吸氧和稳定性影响比较小,但有DMT存在时,糖精则明显起加速作用。更多还原

【Abstract】 As a bifunctional monomer polyethylene glycol dimethacrylate is the principle constituent of anaerobic adhesives. In the presence of dimethyl toluidine (DMT), saccharin, hydroquinone, cuprous-ion or oxalic acid the oxidation of triethylene glycol dimethacrylate (TEGD) at 70±2℃ and room temperature were studied respectively. It is shown that DMT or cuprous-ion will accelerate, while hydroquinone or oxalic acid will suppress the oxidation of TEGD. Saccharin will also accelerate the oxidation of TEGD in the presence of DMT.Oxygen obsorption of anaerobic adhesives were also studied. It is found that anaerobic adhesive is a system which will absorb oxygen gradually and continously. The effect of various constituents in the anaerobic adhesives on the oxygen absorption of TEGD as well as on the stability of the system seems to be parallel with that on the oxidation of TEGD. So DMT or cuprous-ion will accelerate oxygen absorption and reduce the stability of TEGD, while oxalic acid will suppress oxygen absorption and increase the stability of TEGD; the corresponding effects of CHPO and saccharin are rather weak but distinct acceleration is observed with saccharin in the presence of DMT.更多还原