摘要
为了开发耐高温、可溶解、易于功能化改性的聚芳醚砜,以 4-(3-苯基-4-羟基苯基)-2,3-二氮杂萘-1-酮、4,4′-二羟基二苯砜和4,4′-二氯二苯砜为单体,采用高温溶液缩聚法合成一系列不同单体比例的含侧苯基杂环共聚醚砜(PPESS-Ps).利用核磁共振氢谱、红外光谱和X射线衍射表征了PPESS-Ps结构,并测试了PPESS-Ps的特性黏度、分子量、热性能、溶解性、力学性能以及亲水性.结果表明,PPESS-Ps化学结构符合预期,共聚组成可控,其特性黏度介于0.79～0.92 dL/g,数均分子量在2.75×104～4.65×104之间;PPESS-Ps属于无定形聚合物,其玻璃化转变温度大于245℃,5%热失重温度高于511℃,800℃下残炭率超过40.6%,耐热性好且热稳定性优异;PPESS-Ps能溶于N-甲基吡咯烷酮、N,N-二甲基乙酰胺以及氯仿等有机溶剂中,并且表现出优良的力学性能,其拉伸模量在1.61～1.92 GPa之间,拉伸强度介于55～81 MPa.
Abstract
To develop the polyarylethersulfone that is temperature resistant and soluble,easy to be functionally modified,a series of copolyether sulfones containing pendant phenyl groups(PPESS-Ps)were prepared via high-temperature solution polymerization.A series of heterocyclic copolyether sulfones(PPESS-Ps)with different monomer ratios were synthesized by the high-temperature solution polycondensation method.4-(3-phenyl-4-hydroxyphenyl)-2,3-phthalazin-1-ketone,4,4′-dihydroxydiphenyl sulfone,and 4,4′-dichlorodiphenyl sulfone were used as the monomers.The structures of PPESS-Ps were investigated via nuclear magnetic resonance hydrogen spectroscopy,infrared spectroscopy,and X-ray diffraction.Intrinsic viscosity,molecular weight,thermal properties,solubility,mechanical properties,and hydrophilicity of PPESS-Ps were characterized.The results indicate that the chemical structures of PPESS-Ps meet the expectations and the copolymerization compositions of PPESS-Ps are controllable.The intrinsic viscosity range of PPESS-Ps is0.79-0.92 dL/g,while the number-average molecular weight range is 2.75×104-4.65×104.For amorphous PPESS-Ps,the glass transition temperature is greater than 245℃,the 5%thermogravimetric temperature is higher than 511℃,and the residual carbon rate exceeds 40.6%at 800℃,demonstrating that the PPESS-Ps have excellent heat resistance and thermal stability.PPESS-Ps could dissolve well in N-methylpyrrolidone,N,N-dimethylacetamide and chloroform.Besides,PPESS-Ps exhibit excellent mechanical properties,the tensile modulus range is 1.61-1.92 GPa,and the tensile strength range is 55-81 MPa.
维普
万方数据