聚芳醚砜醚酮酰亚胺树脂的合成与表征

Synthesis and Characterization of Poly(Aryl Ether Sulfone Ether Ketone Imide)s

以N,N-′(4,4′-二苯醚)二偏苯三甲酰亚胺酰氯和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(Tg),较好的耐热稳定性,在N-甲基-2-吡咯烷酮、氯仿、间甲酚和邻氯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 polyeondensation, taking N, N＇-（ 4, 4＇-diphenylether ） bistrimellitimide diaeid 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（lH-NMR） were used to confirm the structure of the resulting copolymers. The thermal behavior of copolymers was investigated by differential scanning calorimetry（DSC） and thermogravimetrie 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 eopolymers were amorphous. Amorphous samples showed a good solubility in several organic solvents, such as： N-methyl-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 % ）.