【摘要】 在弱碱性条件下,以尿素和多聚甲醛为原料进行加成反应合成Uron环结构化合物。利用13CNMR、FTIR研究弱碱性环境下产物结构特征。结果表明:多聚甲醛在弱碱性条件下尿素的取代主要以多取代为主,产物中有高含量的Uron环结构存在。环境温度为25℃,pH值为8~9时,产物稳定性好、贮存期长、游离甲醛含量低;DSC-TG结果表明产物有较好的热稳定性,适合后续反应。更多还原

【Abstract】 Under the alkalescency condition,Uron rings compound was synthesized by the addition reaction with paraformaldehyde and urea as materials.The characteristic of structure formation of the product synthesized under the alkalescency condition was analyzed by 13CNMR and FTIR methods.The results show that the urea is reacted by multi-replacement in the process of paraformaldehyde under the alkalescency condition;and high content of Uron rings exists in the product.Under the conditions of 25 ℃ ambient temperature and a pH value of 8～ 9,the product can be stored for a long time with good stability and low extricate formaldehyde.The result of DSC-TG indicates that the product has better thermo stability and adapts to succeeding reaction.更多还原