通过DSC、红外光谱、流变仪和力学性能测试等方法,研究了3228树脂及T700/3228预浸料的性能。结果表明:3228树脂初始固化温度为67.9 ℃,峰值固化温度为89.5 ℃;在60 ℃时具有大于2 h的低黏度平台期,黏度值在20~30 Pa·s;温度大于65 ℃后表现出低温快速固化的特性;采用60 ℃预固化1 h,80 ℃固化3 h的非热压罐成型工艺方案,制备的复合材料具有较低的孔隙率和良好的力学性能。
The performance of T700/3228 prepreg was studied by differential scanning calorimetry(DSC), infrared spectroscopic,rheometer and mechanical properties testing.The result shows that the initial curing temperature and peak curing temperature are 67.9 ℃ and 89.5 ℃,respectively. The viscosity for 3228 resin at 60 ℃ is between 20 to 30 Pa·s and maintains more than 2 h.When temperature is above 65 ℃,the rapid curing characteristics is showed. The composite with low porosity and good mechanical properties have been prepared by adopt 60 ℃ procuring 1 h,80 ℃ curing 3 h as molding process plan.