【作者】 赵广；

【导师】 张丽华；

【作者基本信息】 中北大学 ， 高分子化学与物理， 2012， 硕士

【摘要】 本研究课题的主要目的是通过化学方法改性环氧树脂，提高其耐热老化性能，使其能在高温环境下长期工作。本论文的研究工作主要分为两部分：第一部分为有机硅树脂改性环氧树脂预聚体的合成与粘结体系的性能表征；第二部分为氨基硅油改性环氧树脂预聚体的合成与粘结体系的性能表征。以有机硅树脂、氨基硅油为原料分别与环氧树脂合成线型环氧树脂预聚体，然后分别使用双氰胺树脂、聚酰胺作为固化剂进行交联固化，形成不同固化剂类型的粘结体。采用正交试验考察了各因素对其粘结性能的影响，得出耐热性能较佳的合成工艺条件。实验结果表明：用有机硅树脂改性环氧树脂的耐热性，在58℃条件下反应6h制得的改性环氧树脂较理想，并在158℃条件下用双氰胺在间苯二酚的促进作用下固化1h，其性能较理想，其剪切强度均值达到了12.47MPa。在较佳固化条件下固化，并进行了耐热老化实验，其在141℃高温条件下老化60h，剪切强度仍然达到了15MPa，由此可得出实验合成的有机硅改性环氧树脂可以在140℃高温下工作至少60h；用氨基硅油改性环氧树脂的耐热性，在90℃条件下当环氧树脂:氨基硅油:聚酰胺树脂=3:2:2时测得改性后的环氧树脂预聚体的耐热性能较好。更多还原

【Abstract】 Through modifying epoxy resin by chemical method , the purpose of this subject was toimprove its heat aging resistance performance and enable them to work in high-temperatureenvironment for long time. This thesis is mainly divided into two parts: the first part containssynthesis of epoxy pre-polymer modified by d part includes synthesis of epoxy pre-polymermodified by amino silicone oil and characterization of its bonding system; the second partincludes synthesis of epoxy pre-polymer modified by silicone resin and characterization of itsbonding system.Various binders have been obtained from silicone resin, amino silicone oil with the helpof the curing agent polyamide resin and dicyandiamide. By the orthogonal experiment, theinfluencing factors of the properties of the binders have been systematically studied and theoptimum process conditions have been confirmed.As the experiments showed that the synthesized epoxy resin modified by silicone resin at58℃, for 6h had better performance. In addition, with dicyandiamide in the curing process,the epoxy resin cured at 158℃, for 1h the shear strength reaches 12.47MPa.The heat-resistanttest has been carried out that the shear strength has been keeping 15MPa though worked at141℃for 60h. The epoxy resin modified by amino silicone oil has good performance at 90℃,with the proportion of epoxy resin: amino silicone oil: polyamide resin = 3:2:2.更多还原