摘要
以差示扫描量热法(DSC)和薄层油膜微氧化实验(TMOT)分别考察了二烷基二硫代氨基甲酸锡(SnD-DC)和芳胺抗氧剂对,对二辛基二苯胺(DODPA)在季戊四醇酯和聚-α-烯烃合成润滑油中的热氧化安定性,并以红外光谱跟踪考察了润滑油在氧化过程中结构组分的变化情况。DSC氧化实验结果表明,在含DODPA的季戊四醇酯中加入SnDDC,可明显提高润滑油的起始氧化温度和氧化诱导时间,二者表现出良好的抗氧协同效应。TMOT实验结果表明,SnDDC和DODPA在聚-α-烯烃中复配后,可明显降低氧化油样的蒸发损失和红外面积比值,具有良好的抗氧协同性能。
Differential scanning calorimetry （ DSC ） and thin film micro oxidation test （ TMOT ） were employed to evaluate the antioxidation properties of tin dialkyldithiocarbamate （SnDDC） and p,p＇-dioetyldiphenylamine （DODPA） antioxidant in pentaerythritol ester （PE） or polyalphaolefin synthetic lubricant （PAO）. The chemical structures were identified by fourier transform infrared spectroscopy （FTIR）. DSC results showed that incipient oxidation temperature and oxidation induction time of DODPA containing PE were improved significantly by SnDDC addition; SnDDC had a good oxidative synergism with DODPA antioxidant. TMOT results indicated that the combination of SnDDC and DODPA in polyalphaolefin can also effectively reduce the weight lost, carbonyl peak square index and deposits of oxidized oils.
出处
《精细石油化工》
CAS
CSCD
北大核心
2009年第6期30-33,共4页
Speciality Petrochemicals
基金
清华大学摩擦学国家重点实验室开发基金资助项目(SKLT07-05)
