论文部分内容阅读
以固化剂乙二胺与(环氧树脂)进行固化反应,经过钛酸酯偶联剂TC-WT对纳米碳酸钙进行表面处理,选择超声波分散和高速剪切分散,添加纳米碳酸钙制备复合材料。红外光谱分析结果表明:表面改性后的纳米碳酸钙粒子表面呈疏水性,在有机溶剂中分散性变好,碳酸钙粒子与改性剂之间发生了化学键合。TEM照片分析结果表明,改性纳米碳酸钙分散性得到了较好的改善,这种模糊的界面说明纳米碳酸钙与有机基体有较好的相容性。通过DTA曲线分析和TG表征可知,改性纳米CaCO3能够有效提高环氧树脂固化物耐热稳定性。在330～450℃,改性纳米Ca-CO3复合材料的热失质量较空白基体的热失质量小,复合材料的热稳定性略有提高。
The curing agent ethylenediamine and (epoxy resin) curing reaction, after titanate coupling agent TC-WT nano-calcium carbonate surface treatment, select the ultrasonic dispersion and high-speed shear dispersion, the addition of nano-calcium carbonate to prepare composite materials . The results of FTIR showed that the surface of the modified nano-CaCO 3 particles was hydrophobic, the dispersion in the organic solvent was better, and the chemical bonding between calcium carbonate particles and the modifier occurred. TEM photo analysis results show that the dispersion of modified nano-CaCO3 has been better, this fuzzy interface shows nano-calcium carbonate and organic matrix has good compatibility. By DTA curve analysis and TG characterization, it can be seen that modified nano-CaCO3 can effectively improve the thermal stability of the epoxy resin cured product. At 330-450 ℃, the thermal loss mass of the modified nano-Ca-CO3 composite is smaller than that of the blank matrix, and the thermal stability of the composite increases slightly.