氨丙基苯基有机硅树脂的制备研究

The preparation of phenyl/aminopropyl resin

有机硅树脂因具有良好的物理和化学性能获得了广泛的应用,而氨丙基苯基有机硅树脂不仅耐热性良好,还因活性氨基的存在具有更加优异的性能。本文以γ-氨丙基三乙氧基硅烷(APS)和苯基三甲氧基硅烷(PTES)为主要原料,在水和乙醇的存在下,以四甲基氢氧化铵(TMAOH)作为催化剂,通过水解共缩聚的方法合成了氨丙基苯基有机硅树脂。探讨了反应单体配比、水与乙醇比例、催化剂的用量及反应时间对反应的影响,采用反滴定法测定了产物的氨基含量,并通过红外光谱法对产物的结构进行了表征。结果表明,n_(APS)/n_(PTES)为1:2、水60 mL、乙醇40 mL、催化剂TMAOH 1 mL、反应时间8h是制备氨丙基苯基有机硅树脂的最佳条件。

Due to their good physical and chemical properties,the silicone resins have obtained a wide range of applications.While because the presence of reactive amino groups,the phenyl/aminopropyl silicone resins have both the good heat resistance and perfect performance. The phenyl/aminopropyl silicone resins were prepared via the hydrolytic co- condensation ofphenyltrimethoxysilane （PTES） and γ -aminopropyltriethoxysilanein（APS） in the presence of ethanol and water under the catalysis of tetramethylammonium hydroxide（TMAOH） in this paper.Various influencing factors on the hydrolytic co-condensation reaction such as the ratio of reactants, proportion of solvent water and ethanol, TMAOH amount and reaction time were discussed. The amino content of the product was determined by reverse titration and the product structure was characterized by infrared spectroscopy analysis.The results show that the best conditions of preparation are as follows： APS/PTES molar ratio of 2,water 60 mL,ethanol 40 mL,catalyst TMAOH 1 mL and reaction time 8 h .The infrared spectroscopy analysis showed that the phenyl/aminopropyl silicone resin was synthesized successfully.