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First introduced in recent years, poly ether nitrile, poly ether nitrile sulfone research progress, including: 1, 9,9 - dichloro-xanthene intermediate the xanthene ketones as the starting material, thionyl role body, followed by substitution reaction with phenol, exploring a \The methods yield of 82%. 2, based on the above, xanthone as raw materials, through the role of thionyl chloride to give 9,9 - dichloro-xanthen intermediates, in turn with the phenol, o-cresol, and 2,6 - dimethyl phenol substitution reaction to \3 - methyl-phenyl) xanthene and 9,9 - bis (4 - hydroxy-3 ,5 - dimethyl-phenyl)-xanthene, the yield was 80.2% and 82.8%, respectively. 3, using the solution polycondensation method, under nitrogen, with DMAC as a solvent, the BHPX, 2,6 - Difluorobenzonitrile and hydroquinone three yuan copolycondensate, synthesized a series of novel poly structure containing xanthene aryl ether nitrile. The polymers having a higher heat resistance, the 5% weight loss temperature (Td5) of between 407 ° C and 447 ℃, Tg between 216-257 ℃ between the logarithmic ratio of the viscosity number of 0.40-1.08 dL / g, a tensile strength of 48-60 MPa, a tensile modulus of 0.97-1.2 GPa, the breaking elongation of 5.9-13%, room temperature, can be dissolved in DMF, DMAC, DMSO, NMP, dichloromethane, chloroform, tetrahydrofuran and pyridine. 4, according to the above polymerization method, 9,9 - bis (3 - methyl-4 - hydroxyphenyl) xanthene as a third monomer, and hydroquinone and 2,6 - difluorobenzonitrile the ternary copolycondensation series of Novel xanthene structure and dimethyl side groups poly ether nitrile. Class novel poly (ether nitrile) having a higher heat resistance, having a Tg range of between 213-222 ℃, the logarithmic ratio of the viscosity number of 0.30-0.70 dL / g, and a tensile strength of 56-121 MPa, and pull stretch modulus for 1.11-1.44GPa, and breaking elongation of 5.1-5.4%, room temperature, is soluble in an organic solvent such as NMP, DMF, DMSO. 5, according to the above polymerization method, 9,9 - bis (3,5 - dimethyl -4 - hydroxyphenyl) xanthene as a third monomer, hydroquinone and 2,6 - difluoro benzene nitrile the ternary copolycondensation, and a series Novel xanthene structure and tetramethyl side groups of poly ether nitrile. The series polymer having a high heat resistance, and a 5% weight loss temperature (T5) having a Tg ranging between 358 ℃ and 398 ℃ 248-289 ℃ between the logarithmic ratio of the viscosity number of 0.28- 0.57dL / g, a tensile strength of 53-59MPa, the tensile modulus of 1.1-1.3 GPa, and fracture elongation of 2.2-3.6%, can be dissolved in DMF, DMAC, DMSO, NMP, dichloromethane, chloroform, tetrahydrofuran and pyridine. 6, according to the above polymerization method, BHPX, 4,4 '- dichloro diphenyl sulfone, and 2,6 - difluorobenzonitrile ternary copolycondensate, prepared a series of new xanthene structure-containing polyarylene ether nitrile sulfone. Viscosity of the polymer obtained in the 0.41-0.65dL / g, has a high heat resistance, a 5% weight loss temperature (Td5) of between 447 ℃ and 518 ℃, the Tg range of between 236-277 ℃ a tensile strength of 91-117 MPa, and the tensile modulus of 2.4-2.8GPa, 8.3-17.3% of the breaking elongation, can be dissolved in DMF, DMAC, DMSO, NMP and dichloromethane, chloroform, tetrahydrofuran, pyridine in.
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