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本文针对聚二甲基硅氧烷改性环氧树脂相溶性太差,性能不够理想等问题,提出用氰丙基替代部分甲基以减小聚硅氧烷与环氧树脂的溶度参数差,改善两相的相溶性。采用氨丙基封端的聚氰丙基甲基硅氧烷低聚体(表1)单独或与二乙烯三胺(固化剂)一同与双酚A环氧树脂反应,合成了一系列不同聚硅氧烷分子量和重量百分比的样品(表2)。并用示差扫描量热计(DSC)、动态力学谱(DMA)、光电子能谱(XPS)、接触角仪、扫描电子显微镜(SEM)、电子拉力试验机对其进行研究。结果表明在聚硅氧烷软段中引入氰丙基可提高两相的相溶性并使增韧效果明显改善。
In this paper, polydimethylsiloxane modified epoxy resin compatibility is too poor, the performance is not ideal and so on, proposed to replace part of the methyl propyl with cyanopropyl to reduce the solubility of silicone and epoxy resin poor parameters , To improve the compatibility of the two phases. A series of different polysiloxanes were synthesized using aminopropyl-capped poly (methylcyclotetramethylene) oligomers (Table 1) alone or together with diethylenetriamine (curing agent) with bisphenol A epoxy resin Oxygen molecular weight and weight percent samples (Table 2). The films were characterized by differential scanning calorimetry (DSC), dynamic mechanical spectroscopy (DMA), photoelectron spectroscopy (XPS), contact angle meter, scanning electron microscopy (SEM) and electronic tensile testing machine. The results show that the introduction of cyanopropyl silicone soft segment can improve the compatibility of the two phases and the toughening effect significantly improved.