Study On Synthesis And Properties Of Polychloro Substituted Poly Aryl Ether Ketone,Poly Aryl Amide And Poly Aryl Ester

In this dissertation, the resent progress on the study of polyarylether ketone, polyaryl amide and polyaryl ester was firstly investigated. This paper was mainly composed of five parts as follow.(1) A series of novel soluble polychloro substituted poly(aryl ether ketone)s (3b-3j) with high molecular weight were synthesized from 2-methyldiphenyl ether (2b), 3-methyldiphenyl ether (2c), 4,4'-bis(2,6-dimethylphenoxy)diphenylketone (2d), 1,4-bis(4-phenoxybenzoyl)benzene (2e), 1,4-bis[4-(2-methylphenoxy)benzcyl]benzene (2f), l,4-bis[4-(2,6-dimethylphenoxy)benzoyl]benzene (2g), 4,4'-diphenoxy-diphenylsulfone (2h), 4,4'-bis(2-methylphenoxy)diphenylsulfone (2i), 4,4'-bis-(P-naphthoxy) diphenylsulfone (2j) and tetrachloroterephthaloyl chloride (TCTPC) by low temperature solution polycondensation, respectively. The prepared polymers were characterized by FT-IR, DSC, TG and WAXD, etc.(2) A series of poly (aryl ether ketone ketone)/polychloro substituted poly (aryl ether ketone ketone) (PEKK/C-PEKK) copolymers have been prepared by low temperature solution polycondensation of tetrachloroterephthaloyl chloride, diphenyl ether and terephthaloyl chloride in 1,2-dichloroethane in the presence of AlCl₃ and NMP. The copolymers have been characterized by FT-IR, DSC and WAXD, etc. The results showed that the copolymers exhibit excellent heat-resistance. Raising C-PEKK content in the copolymer increases the T_g, but decreases its T_m and crystallinity. The copolymer was soluble in CHCl₃, THF and strongly polar organic solvents such as DMF, DMSO and NMP at room temperature when the C-PEKK content is above 50(mol) %.(3) A series of novel polychloro substituted poly (aryl ether ketone sulfone) (PESEKK/C-PESEKK) copolymers with high molecular weight have been prepared by low temperature solution polycondensation of TCTPC, 4,4-diphenoxydiphenylsulfone (DPODPS) and TPC in 1,2-dichloroethane in the presence of AlCl₃ and NMP. The copolymers have been characterized by FT-IR, DSC and WA.XD, etc. The results showed that the copolymers are non-crystalline, exhibit high T_g(168²32 ℃), which was higher than that of commercialized PEEK and PEKK and increased with raising of C-PESEKK unit contents. But the 5% weight loss temperature (T_d) of the copolymer was little lower than that of commercialized PEEK and PEKK. The copolymers were soluble in CHCl₃ and strong;ly polar organic solvents such as DMF, DMSO and NMP at room temperature.(4) Five kinds of novel polychloro substituted polyamides with high molecular weight were synthesized from 4,4'-diaminodiphenylsulfone (4a), 4,4'-diaminodiphenyl methane (4b), 4,4'-diaminodiphenyl ether (4c), p-phenylenediamine (4d), benzidne (4e) and TCTPC by low temperature solution polycondensation under N₂, respectively. The prepared polymers were characterized by FT-IR, DSC, TG. The results showed that the polymers exhibit excellent heat-resistanpe. The onset temperature taken at 5% weight loss of the polymers in nitrogen was all over 470 ℃. The polymers were soluble in strongly polar organic aprotogenic solvents such as DMF, DMSO and NMP at room temperature.(5) Three novel polychloro substituted polyaryiesters with high molecular weight were synthesized from hydroquinone (6a), resorcinol (6b), 1,6-hexanediol (6c) and TCTPC in 1,2-dichloroethane by solution polycondensation respectively in the presence of pyridine and N₂. Three polymers were by FT-IR, DSC, TG. The results showed that the polyaryiesters exhibit excellent heat-resistance. The onset temperature taken at 5% weight loss of the polyaryiesters in nitrogen was all over 290 ℃. The polymers were soluble in concentrated H₂SO₄ and NMP at room temperature.