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利用三(二亚苄基丙酮)二钯(Pd2(dba)3)与1.1′-联萘-2.2′-二苯膦(BINAP)组成的催化体系,高效地催化4,4′-二氯二苯砜和芳香二胺的Buchwald-Hartwig交叉偶联反应,制备出新型聚亚胺砜.聚合物结构通过核磁氢谱、红外谱图、凝胶渗透色谱和元素分析等方法进行表征,表征结果与目标产物相吻合,并具有较高的分子量(Mw>2.5×104).利用DSC、TG和XRD等对其性能进行测试,结果表明,该类聚合物为无定形态,具有较高的玻璃化转变温度(Tg>200℃)、良好的热稳定性(Td>400℃)和溶解性能.其中含异丙基的PIS-3不仅可溶解在强极性溶剂中,并且在室温条件下(25℃)可溶于四氢呋喃中.
A catalytic system consisting of tris (dibenzylideneacetone) dipalladium (Pd2 (dba) 3) and 1,1’-binaphthyl-2,2’-diphenylphosphine (BINAP) Phenyl sulfone and aromatic diamine Buchwald-Hartwig cross-coupling reaction to prepare a new type of polyimine sulfone polymer structure was characterized by 1H NMR, IR spectra, gel permeation chromatography and elemental analysis, the results of the characterization and (Mw> 2.5 × 104). The properties of these polymers were tested by DSC, TG and XRD. The results showed that these polymers were amorphous and had high vitrification The transition temperature (Tg> 200 ℃), good thermal stability (Td> 400 ℃) and dissolution properties of which is not only isopropyl PIS-3 can be dissolved in a highly polar solvent, and at room temperature conditions ° C) is soluble in tetrahydrofuran.