摘要
首先通过Friedel-Crafts酰基化反应得到4,4′-二溴二苯甲酮,以4,4′-二溴二苯甲酮和4,4′-二氨基偶氮苯为底物,通过钯催化的胺化反应缩聚合成了含有偶氮苯的聚芳亚胺(PAIA)。PAIA的化学结构通过红外、核磁氢谱和元素分析表征,表征结果与聚合物结构吻合良好。测试了不同条件下聚合物的紫外吸收性能,聚合物结构中偶氮苯随着外界条件改变时,偶氮苯顺反式结构的变化。另外,差示扫描量热(DSC)和热重(TG)测试结果表明,PAIA具有较高的玻璃化转变温度(Tg>176℃),良好的热稳定性(TD>410℃)。
4,4′-dibromobenzophenone was synthesized by Friedel-Crafts benzoylation reaction first. 4,4′-dibromobenzophenone and 4,4′diaminoazobenzene as the monomers, poly（aryl imino） containing azobenzene unite （PAIA） was synthesized via palladium-catalyzed amination. The structure of PAIA was characterized by means of Fourier transform infrared spectrum（FT-IR）, 1H nuclear magnetic resonance spectrum（1H-NMR） and elemenual analysis, the results show an agreement with the proposed structure. The UV absorption spectra was tested under different conditions. Photoinduced cis-trans isomerization behavior of the polymers was investigated. These polymers show good photochromic properties. Additionally, differential scanning calorimetry （DSC） and thermogravimetric （TG） measurements show that PAIA possess high glass transition temperature （Tg〉176 ℃） and good thermal stability with high decomposition temperatures in nitrogen atmosphere （TD〉410 ℃）.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2010年第7期23-25,30,共4页
Polymer Materials Science & Engineering
基金
高温高密度等离子体物理国防科技重点实验室基金(9140C6806030807)
关键词
聚芳亚胺
偶氮苯
钯催化胺化反应
poly（aryl imino）
azobenzene unite
palladium-catalyzed amination
