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Synthesis & characterization of novel silicone dendrimers as base stock for high performance lubricants

机译:新型有机硅树枝状大分子作为高性能润滑油基础油的合成与表征

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The silicone core G(I) dendrimers having terminal Si-H groups reacted with maleic anhydride in presence of Speier's catalyst to afford anhydride terminated dendrimers. These anhydride dendrimers were further reacted with long chain aliphatic alcohols in presence of lower valent tin oxide as catalyst to synthesize novel second generation complete neutral silicone ester dendrimers. These high performance silicone esters dendrimers can be used for different avionic applications and also as base stock material for lubricants. Characterizations of the dendrimers were carried out by elemental analysis; Fourier transforms infrared spectroscopy (FT-IR) and proton nuclear magnetic resonance spectroscopy (H-1 NMR spectroscopy). Physical properties like density, viscosity, flash point and pour point of the dendrimers were also studied. Vapor pressure osmometery (VPO) and gel permeation chromatography (GPC) were used for measuring the molecular weight and molecular weight distribution of the dendrimers. (C) 2015 Elsevier B.V. All rights reserved.
机译:具有末端Si-H基团的硅酮核G(I)树状聚合物在Speier催化剂的存在下与马来酸酐反应以提供酸酐封端的树状聚合物。在低价氧化锡作为催化剂的存在下,这些酸酐树枝状聚合物进一步与长链脂族醇反应,以合成新型的第二代完全中性有机硅酯树枝状聚合物。这些高性能的有机硅酯树状聚合物可用于不同的航空电子应用,也可用作润滑剂的基础原料。通过元素分析对树枝状聚合物进行表征;傅里叶变换红外光谱(FT-IR)和质子核磁共振光谱(H-1 NMR光谱)。还研究了树枝状聚合物的物理性质,如密度,粘度,闪点和倾点。蒸气压渗透计(VPO)和凝胶渗透色谱法(GPC)用于测量树枝状聚合物的分子量和分子量分布。 (C)2015 Elsevier B.V.保留所有权利。

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