环梯形聚苯基硅倍半氧烷的硝化研究

发布时间：2018-06-05 14:00

本文选题：有机-无机杂化材料 + 环梯形聚苯基硅倍半氧烷　；参考：《有机化学》2017年07期

【摘要】：以环梯形聚苯基硅倍半氧烷(CL-PPSQ)为原料,采用HNO_3-(CH_3CO)_2O硝化体系,在不同的条件下对其进行硝化,制备得到含硝基基团的NO_2-PPSQ.使用GPC、TGA、~1H NMR、FTIR、元素分析等测试手段对硝化产物进行表征.结果表明,75%HNO_3-(CH_3CO)_2O硝化过程温和,硝化能力适中,制备得到分子链不断裂且实现了苯基完全一硝化的硝化产物.对不同硝化试剂的硝化机理进行了分析,在发烟硝酸、HNO_3-H_2SO_4、KNO_3-H_2SO_4中,NO_2~+为硝化活化剂,硝化能力强,会导致CL-PPSQ分子链断裂;对于HNO_3-(CH_3CO)_2O体系,CH_3COONO_2为主要的硝化活化剂,硝化能力适中.
[Abstract]:The nitration of CL-PPSQs containing nitro groups was carried out by nitration of CL-PPSQs with HNO_3-(CH_3CO)_2O nitration system under different conditions, and the nitro groups were synthesized from CL-PPSQs containing nitro groups. The nitrifying products were characterized by GPC-TGA 1H NMR-FTIR and elemental analysis. The results showed that the nitrification process was mild, the nitrification ability was moderate, and the molecular chain was not broken and the complete phenyl mononitration was realized. The nitrification mechanism of different nitrifying reagents was analyzed. In HNO3-H2SO4 / KNO3-H2SO4, the nitrification activator was found to be the nitrifying activator, and the nitrification ability was strong, which led to the CL-PPSQ molecular chain break, and for the HNO_3-(CH_3CO)_2O system, CH3COONOsp2 was the main nitrification activator and the nitrification ability was moderate.
【作者单位】：北京理工大学材料学院国家阻燃材料工程技术研究中心;
【基金】：国际科技交流合作(No.S2014ZR0465) 国家自然科学基金(No.51273022)资助项目~~
【分类号】：O634.41

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