十二烷基/苯基硅油的合成与性能研究

Synthesis and Characterizations of Dodecyl/phenyl Modified Polysiloxane

摘要:

通过调整和优化高含氢硅油（UC202），甲基苯基混合环体(DMe,Ph)、六甲基二硅氧烷（MM）和1-十二烯原料配比和制备工艺，合成一系列具有不同配比的烷基/苯基共改性硅油（PAPMS），并考察了合成工艺对PAPMS的热性能、密度、黏度及黏度指数、与矿物油的相容性以及对矿物油抗磨性能的影响。结果表明：苯基的引入可提高硅油的热稳定性；长链烷基的引入提高了PAPMS的残炭率和黏度，并能使黏度指数降低；烷基的含量为0.90 mmol/g的PAPMS可与矿物油互溶，将其以10wt.%的量加入矿物油中，可使矿物油的磨斑直径从0.64mm减小到0.55mm。

Abstract:

According to optimization of synthesis methods, we prepare a series of different alkyl/phenyl ratio comodified silicone oil (PAPMS) with high hydrogen silicone oil (UC202), methyl phenyl hybrid ring (DMe,Ph), hexamethyldisiloxane (MM), and 1-dodecene as raw materials. The effects of synthesis methods and molecular structure of PAPMS on their thermal stability, density, viscosity (index), homogeneity with mineral oil and abrasion resistance are studied in details. The test results show that phenyl groups are beneficial to enhance thermal stability, and introducing long carbon chain alkyl groups lead to enhancement in weight residue and viscosity, and reduction in viscosity index. The PAPMS with alkyl content of 0.90 mmol/g can form homogeneous liquid with mineral oil. When it is added into mineral oil with 10 wt.%, the wear scar diameter is reduced from 0.64mm to 0.55 mm.