CAJ | 학술논문

以聚α-烯烃（PAO）基础油、2,6-二叔丁基对甲酚（T501）和 p,p’-二异辛基二苯胺（Tz516）混合油样为研究对象，运用高温高压反应釜装置，模拟航空发动机工作环境，测定不同温度反应后的运动黏度，借助 GC/MS 现代检测手段，根据检测到的产物分布，从分子水平推测 PAO 基础油的黏度衰变机理。结果表明，高温环境中，基础油主要发生了热裂解和热氧化等反应，其中分子链的断裂是最主要的反应，产生链长较短的正构烷烃、异构烷烃和烯烃，使分子间作用力减弱，进而降低油样的运动黏度。抗氧剂 T501和 Tz516的加入能够极大地延缓了基础油的黏度降解。
이취α-희경（PAO）기출유、2,6-이숙정기대갑분（T501）화 p,p’-이이신기이분알（Tz516）혼합유양위연구대상，운용고온고압반응부장치，모의항공발동궤공작배경，측정불동온도반응후적운동점도，차조 GC/MS 현대검측수단，근거검측도적산물분포，종분자수평추측 PAO 기출유적점도쇠변궤리。결과표명，고온배경중，기출유주요발생료열렬해화열양화등반응，기중분자련적단렬시최주요적반응，산생련장교단적정구완경、이구완경화희경，사분자간작용력감약，진이강저유양적운동점도。항양제 T501화 Tz516적가입능구겁대지연완료기출유적점도강해。
Under stimulated aeroengine working condition in high temperature and high pressure reaction kettle, the kinematic viscosity of poly-α-olefin (PAO) aviation lubricating base oil with 2,6 ditbutyl-p-cresol (T501) and p,p'-diisooctyl diphenylamine (Tz516) after the reaction at different temperature was determined. Meanwhile, the composition and structure of reacted samples were detected by gas chromatography/mass spectrometry (GC/MS) to investigate the mechanism of viscosity degradation. The results show that, under high temperature, pyrolysis and thermal oxidation of the aviation lubricating base oil can happen, the breakage of molecular chain can produce n-alkanes, iso-paraffins and olefins, which will cause intermolecular force reduce to decrease the kinematic viscosity. In addition, adding T501 and Tz516 can prevent the thermal oxidation of PAO significantly.