摘要
用新戊二醇(NPG)和对苯二甲酰氯(TPA)反应生成"低聚物"中间体,当n(NPG)/n(TPA)由2.4增加至3.0时,中间体的聚合度(m)在3.5～1.45之间,收率75.5%。再将中间体与油酸、菜籽油酸进行酯化得到复合酯,收率88.5%。结果表明,复合酯的粘度随着分子量的增大而增大,粘度指数大于125,凝点低于-27℃,氧化稳定性随分子量的增大而提高,生物降解率>70%,最大无卡咬负荷(PB)为784N,磨斑直径0.41mm,热分解温度>250℃,因此目标产物是性能良好的绿色润滑剂。
An intermediate was prepared by the esterification of neopentyl glycol with paraphthaloyl chloride. The polymerization degree of the intermediate was between 3.5 and 1.45 as n（NPG）/n（TPA） was increased from 2.4 to 3.0. The yield of the intermediate was 75.5%. The complex ester was produced by esterification of the intermediate with oleic acid with a yield of 88.5%. The result shows that the viscosity was improved with the increase of the molecular mass of the product, the viscosity at 100℃ was between 17.8 27.6 mm2/s, the viscosity index was more than 125, solidifying point was below - 27℃, the oxidative stability was also improved with the increase of the molecular mass of the product. The biodegradabilities of complex esters were more than 70%. The value of PB was 784 N, the value of wear diameter was 0.41 mm, the temperature of thermal decomposition was above 250℃. The complex esters can be used as excellent green lubricants.
出处
《应用化学》
CAS
CSCD
北大核心
2010年第2期159-163,共5页
Chinese Journal of Applied Chemistry
基金
湖南省自然科学基金(08JJ3019)
湖南省科技计划(2007GK4016)资助项目
关键词
新戊二醇
对苯二甲酰氯
油酸
菜籽油酸
复合酯
润滑性能
neopentyl glycol, paraphthaloyl chloride, oleic acid, rapeseed acid, complex ester, lubricity
