CAJ | 학술논문

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(P_B)为784 N,磨斑直径0.41 mm,热分解温度＞250 ℃,因此目标产物是性能良好的绿色润滑剂.
용신무이순(NPG)화대분이갑선록(TPA)반응생성"저취물"중간체,당n(NPG)/n(TPA)유2.4증가지3.0시,중간체적취합도(m)재3.5～1.45지간,수솔75.5%.재장중간체여유산、채자유산진행지화득도복합지,수솔88.5%.결과표명,복합지적점도수착분자량적증대이증대,점도지수대우125,응점저우-27 ℃,양화은정성수분자량적증대이제고,생물강해솔＞70%,최대무잡교부하(P_B)위784 N,마반직경0.41 mm,열분해온도＞250 ℃,인차목표산물시성능량호적록색윤활제.
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 mm~2/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 P_B 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.