以N,N'-(4,4'-二苯醚)二偏苯三甲酰亚胺酰氟和4,4'-二苯氧基二苯砜、4,4'-二(2-甲基苯氧基)二苯砜、4,4'-二(2,6-二甲基苯氧基)二苯砜为单体.采用低温溶液亲电共缩聚,合成了聚芳醚砜醚酮酰亚胺树脂(PESEKI)s.用傅里叶红外(FT-IR)、核磁共振(~1H-NMR)对其结构进行了表征,差示扫描热分析(DSC)、热分析(TGA)、X广角射线衍射(WAXD)研究其热转变和形态.研究表明,共聚物有较高的玻璃化转变温度(T_g),较好的耐热稳定性,在N-甲基-2-吡咯烷酮、氯仿、间甲酚和邻氟苯酚等有机溶剂中有较好的溶解性.共聚物具有良好的力学性能,其拉伸强度97.8 MPa～118.8 MPa,弹性模量达1.98 GPa～2.37 GPa,断裂伸长率在7.1%～9.4%之间.
Poly(aryl ether sulfone ether ketone imide)s (PESEKI)s were synthesized by low temperature solution polycondensation, taking N, N'-( 4, 4'-diphenylether ) bistrimellitimide diacid chloride, 4, 4'-diphenoxydiphenylsulfone(DPODPS), 4,4'-di(2-methylphenoxy)diphenyl-sulfone (o-MeDPODPS), and 4,4'-di(2, 6-bimethylphenoxy)biphenylsulfone(o-Me2DPODPS) as monomers, respectively. Both Fourier transform infrared spectrophotometer(FT-IR) and ~1H-nuclear magnetic resonance(~1H-NMR) were used to confirm the structure of the resulting copolymers. The thermal behavior of copolymers was investigated by differential scanning calorimetry(DSC) and thermogravimetric analysis(TGA). A good thermal stability was found for all the samples. Wide-angle X-ray diffraction measurements permitted to identify the kind of crystalline structure of the copolymers, which results indicated that all the copolymers were amorphous. Amorphous samples showed a good solubility in several organic solvents, such as: N-methy1-2- pyrrolidone (NMP), chloroform, m-cresol and o-chlorophenol. Tensile test of specimens obtained by solution casting shows that PESEKIs have good mechanical properties (tensile strength 97.8 MPa～118.8 MPa, Young's module at the rang of 1.98 MPa～2.37 MPa, elongation at break 7.1%～9.4%).
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