新型刺激变色聚亚胺砜的制备及性能

Preparation and Properties of Novel Stimuli-responsive Color-changing Polyimine Sulfone

物理掺杂和共价连接小分子变色染料方法制备的刺激变色聚合物材料存在影响聚合物热稳定性或合成较为复杂的缺点。以对硝基苯磺酰氯和溴苯为原料制备4-溴-4'-氨基二苯砜,通过自聚合制备聚亚胺砜,4-溴-4'-氨基二苯砜和聚亚胺砜的产率分别为45%和90%。利用红外光谱仪和液体核磁共振仪对单体和聚合物的结构进行表征,利用紫外-可见分光光度计、热重分析仪和差示扫描量热仪对聚亚胺砜的性能进行表征。结果表明:聚亚胺砜在外界环境变化时颜色会发生高对比度变化且具有可逆性。聚亚胺砜具有优异的热稳定性,其5%热分解温度(T_(5%))为463℃,玻璃化转变温度(T_(g))为245℃。制备的聚合物材料不需要加入小分子变色染料,本身便具备独特的刺激变色响应能力。

The stimuli-responsive color-changing polymer materials prepared by physical doping and covalently linking small molecule color-changing dyes have the disadvantages of affecting the thermal stability of the polymer or complicated synthesis.4-bromo-4'-aminodiphenyl sulfone was prepared from p-nitrobenzenesulfonyl chloride and bromobenzene,and polyimine sulfone was prepared by self-polymerization.The 4-bromo-4'-aminodiphenyl sulfone and polyimine sulfone yields were 45%and 90%,respectively.The structures of monomer and polymer were characterized by the infrared spectrometer and liquid nuclear magnetic resonance spectrometer.The properties of polyimine sulfone were characterized by an ultraviolet-visible spectrophotometer,thermogravimetric analyzer,and differential scanning calorimeter.The results show that the color of polyimine sulfone will have high contrast change and reversibility when the external environment changes.Polyimine sulfone has excellent thermal stability.The 5%thermal decomposition temperature(T_(5%))and glass transition temperature(T_(g))of polyimine sulfone are 463℃and 245℃,respectively.The prepared polymer material does not need to add small molecule discoloration dyes and has a unique stimuli-responsive color-changing ability.