丙烯酸松香与乙二醇二缩水甘油醚预聚体的合成和性能研究

Synthesis and Properties of the Prepolymer from Acrylic Acid Rosin and Ethylene Diglycidyl Ether

丙烯酸松香与乙二醇二缩水甘油醚酯化合成环氧树脂预聚体。探讨了反应温度、催化剂用量等因素对反应的影响,得到最优条件为三乙胺用量0.02%(以丙烯酸松香质量计),反应温度130℃,反应时间5 h。预聚体的环氧值0.19 mol/100 g,黏度16.3 Pa.s(36℃),酸值0.4 mg/g。采用差示扫描量热分析(DSC)、FT-IR等方法研究了固化物性能。结果表明,甲基六氢苯酐(MeHHPA)为固化剂,当m(MeHHPA)∶m(预聚体)8∶10,固化条件为:预聚100℃,反应2 h,190℃固化5 h,固化物的玻璃化转变温度(Tg)最高(53.0℃)。

Prepolymer from acrylic acid rosin and ethylene diglycidyl ether was prepared by esterification between acrylic acid rosin and ethylene diglycidyl ether. Influences of temperature and the amount of catalyst on the reaction were investigated. The optimum experimental condition was as follows ： c（ Et3N）0.02 % （ based on acrylic acid rosin）, 130 ℃ and 5 h. The prepolymer had the following properties ： epoxy value 0.19 mol/100 g, viscosity （ 36 ℃） 16.3 Pa. s, acid value 0.4 mg/g. Property of the cured product was studied by differential scanning calorimetry （DSC） and FT-IR. The glass transition temperature （ Tg ） of the cured product reached 53.0 ℃ when curing condition was as follows：m （MeHHPA） ： m （prepolymer）8 ： 10, pre-polymerized at 100 ℃ for 2 h, cured at 190 ℃ for 5 h.