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对碱木素进行羟甲基化改性,并以此为原料制备天然橡胶/改性碱木素复合材料。研究了复合材料的力学性能、热稳定性、加工性能以及碱木素的微观形貌。结果表明:当甲醛用量为1.0mol/kg碱木素,改性碱木素添加量为10%,丙三醇添加量为6g/100g改性碱木素时,复合材料的力学性能最优。热重分析显示:天然橡胶和复合材料的热稳定性十分接近,复合材料的成炭量有所增加。橡胶加工性能分析(RPA)表明:碱木素经改性后,在天然橡胶中的分散性得到了改善,与天然橡胶基体的相容性得到了提高;复合材料的储能模量、损耗模量和损耗因子增加。
Hydroxymethylation of alkali lignin, and as a raw material for the preparation of natural rubber / modified alkali lignin composites. The mechanical properties, thermal stability, processing properties and microscopic morphology of alkali lignin were studied. The results showed that the mechanical properties of composites were the best when the dosage of formaldehyde was 1.0mol / kg alkali lignin, the content of modified alkali lignin was 10% and the content of glycerol was 6g / 100g modified alkali lignin. Thermogravimetric analysis shows that the thermal stability of natural rubber and composites is very close, and the carbon content of the composites increases. The analysis of rubber processing properties (RPA) showed that the dispersibility of natural lignin was improved after being modified, and the compatibility with natural rubber matrix was improved. The storage modulus, loss modulus Volume and loss factors increase.