中文摘要：

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,α-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.

英文摘要：

2,2 ＇- [ [ 1,1 ＇-biphenyl ] - 4,4 ＇-diylbis （oxy） ]bis [ 6-fluoro-benzonitrile J monomer was synthesized from 4,4＇-biphenol （BP） and 2,6-difluorobenzonitrile （DFBN） through pseudo high dilution, then reacted with the bisphenol-like monomer, 4- （4-hydroxyphenyl） -phthlazin-1 （2H） -one （DHPZ） to obtain alternate-like copolymer （a-PPEBN） by nucleophilic substitution. Random copolymer （r-PPBEN） was synthesized from BP, DFBN and DHPZ through a one-step procedure. Gel permeation chromatography （GPC） test showed that the two methods could both obtain a high molecular-weight polymer with average number molecular weight of 2.4 × 104 for r-PPBEN and of 3.4 × 104 for a-PPEBN. Intrinsic viscosity of a-PPBEN was 0.96 dL/g in chloroform at 25℃ and that of r-PPBEN was 0.94 dL/g. The structure of the monomers and polymers were confirmed by Fourier transform infrared spectroscopy （FTIR） , nuclear magnetic resonance （NMR） , mass spectrum （MS） and element analysis. The tests showed that the two kinds of copolymer displayed different crystallization properties and thernostability in spite of having the same chemical composition. Thermogravimetric analysis （TGA）, differential scanning calorimetry （DSC）, dynamic mechanical thermal analysis （DMA） tests demonstrated that a-PPBEN had better thermal stability, higher glass transition temperature （Tg） and storage modulus than r-PPBEN. Tg of a-PPBEN was almost 10 K higher than that of r- PPBEN,suggesting that a-PPBEN possessed more regular rigid structure than r-PPBEN. Spherocrystal patterns of r-PPBEN under polarizing microscope indicated that some micro blocks of PBEN segments were derived from the reaction of BP and DFBN. Wide-angle X-ray diffraction （WAXD） tests also proved the indication. The copolymers all showed good solubility by virtue of introducing twisted,non-coplanar phthalazinone moieties into the backbone of the polymers. At room temperature, the two kinds of eopolymers were soluble in a variety