论文部分内容阅读
通过竹浆纤维的苄基化实验,研究了反应温度和反应时间对苄基化产物取代度的影响,证明适当延长反应时间、提高反应温度有利于提高产物的取代度。FT-IR、DSC、TGA等对竹浆纤维苄基化产物的分析表明:原料中的部分羟基被苄基取代,产物热稳定性略有下降,发现苄基化竹纤维有较好的热塑性。维卡软化点和熔融温度测试显示产物的热塑性随取代度的增加而增加。取代度大于0.81的苄基化竹浆纤维可在150℃,3.5MPa的压力下像塑料一样热压成型。
The effect of reaction temperature and reaction time on the degree of substitution of benzylated product was studied by the benzylation experiment of bamboo fiber. It was proved that prolonging the reaction time and increasing the reaction temperature could improve the degree of substitution of the product. The FT-IR, DSC, TGA and other analysis of the benzylated products of bamboo fiber showed that part of the hydroxyl groups in the raw materials were substituted by benzyl, the thermal stability of the product decreased slightly, and benzylated bamboo fiber was found to have good thermoplasticity. Vicat softening point and melting temperature test showed that the thermoplasticity of the product increased with the degree of substitution. The benzylated bamboo fiber with the degree of substitution greater than 0.81 can be hot-pressed like plastic at 150 ℃ and pressure of 3.5MPa.