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以联苯二酚(BP)和2,6-二氟苯甲腈(DFBN)为原料通过假高稀释的方式合成了2,2’-[[1,1’-联苯]-4,4’-二氧基]二[6-氟-苯腈]单体,进而与4-(4-羟基-苯基)-2H-二氮杂萘-1-酮(DHPZ)进行亲核取代逐步聚合反应,制得类似交替结构的共聚芳醚腈a-PPBEN.以BP、DHPZ和DFBN通过一步加料的方式,聚合得到无规共聚芳醚腈r-PPBEN.GPC结果表明,两种聚合方法均得到高分子量聚合物.利用红外、核磁、质谱、元素分析等手段对其结构进行了表征,结果与设计一致.DSC、TGA、DMA等测试表明,a-PPBEN比r-PPBEN具有更好的热稳定性,更高的玻璃化转变温度和更高的储能模量.偏光显微镜、XRD等测试表明,r-PPBEN有部分结晶,a-PPBEN则完全为无定型结构.扭曲非共平面的二氮杂萘酮结构的引入改善了聚合物的溶解性能,两种聚合物均能在常温下溶解于多种极性非质子溶剂.
2,2 ’- [[1,1’-biphenyl] -4,4 (triphenylphosphine) -benzoic acid was synthesized by pseudo-high dilution with biphenol (BP) and 2,6-difluorobenzonitrile (DFBN) -dioxyl] bis [6-fluoro-benzonitrile] monomer, followed by nucleophilic substitution stepwise polymerization with 4- (4-hydroxy- phenyl) -2H- phthalazin- 1-one (DHPZ) Were synthesized by the one-step addition of BP, DHPZ and DFBN.The results of GPC showed that both of the polymerization methods obtained Its structure was characterized by IR, NMR, MS, elemental analysis and the results were consistent with the design.DSC, TGA, DMA and other tests showed that a-PPBEN has better thermal stability than r-PPBEN , Higher glass transition temperature (Tg) and higher storage modulus.The results of polarizing microscope and XRD showed that some of the crystals were crystallized in r-PPBEN and a-PPBEN was completely amorphous.The distorted non-coplanar diazide The introduction of the structure of the phthalazinone improves the solubility of the polymer. Both polymers are soluble in many kinds of polar aprotic solvents at room temperature.