A new synthetic route to polyamides and hydroxyl polyamides was established, based on the selecting (?)-acylation of three novel typical active diesters: the active diester of N-hydroxy- (?) 4-epoxy-5-cyclohexene-2, 3...A new synthetic route to polyamides and hydroxyl polyamides was established, based on the selecting (?)-acylation of three novel typical active diesters: the active diester of N-hydroxy- (?) 4-epoxy-5-cyclohexene-2, 3-dicarboximide( HOEC), such as N, N'-(temphthaloyldioxy) bis(1, 4- epoxy - 5 - cyclohexene- 2, 3 - dicarboximide.) ( PBOEC), N, N'- ( isophthaloyl - dioxy) bis (1,4-epoxy-5-cyclohexene-2, 3-dicarboximide)(IPBOEC) and N, N' -(adipoyldioxy) his (1,4-epoxy-5-cyclohexene-2, 3-dicarboximide) ( ADOEC)with aliphatic diamines and 1,3-diamino-2-hydroxypropane. The polycondensation occurs at room temperature in solution without added catalyst. Dipolar aprotic solvents which include dimethyl sulfoxide, N- methyl - 2- pyrrolidone and dimethylformamide were used as solvents for polymerization. The selective N-acylation of two active diesters was performed as a model reaction study.展开更多
The high activ penta-coordinated silicon potassium compound was prepared by the reaction of amorphous silica with the ethylene glycol,catalyzed by the potassium hydroxide,and the ethyl tetra-coordinated silicon compou...The high activ penta-coordinated silicon potassium compound was prepared by the reaction of amorphous silica with the ethylene glycol,catalyzed by the potassium hydroxide,and the ethyl tetra-coordinated silicon compound was synthesized by the reaction of this penta-coordinate silicon potassium compound with allyl chloride.Then the copolymer was prepared by the reactwn of this ethyl tetra-coordinated silicon with the methyl-acrylic acid β-hydroxyl ethyl ester,and its structure and thermal property were characterized by IR,TG,DSC et al.IR indicated the reaction has finished because of no absorption near 1630cm-1.TG indicated the decomposing temperature of copolymer is 300 ℃.DSC indicated the glass transition temperature is 63.1℃.The copolymer was not soluble in any solvent and had no melt-point.All analysis proved the copolymer exists some extent linkage.展开更多
文摘A new synthetic route to polyamides and hydroxyl polyamides was established, based on the selecting (?)-acylation of three novel typical active diesters: the active diester of N-hydroxy- (?) 4-epoxy-5-cyclohexene-2, 3-dicarboximide( HOEC), such as N, N'-(temphthaloyldioxy) bis(1, 4- epoxy - 5 - cyclohexene- 2, 3 - dicarboximide.) ( PBOEC), N, N'- ( isophthaloyl - dioxy) bis (1,4-epoxy-5-cyclohexene-2, 3-dicarboximide)(IPBOEC) and N, N' -(adipoyldioxy) his (1,4-epoxy-5-cyclohexene-2, 3-dicarboximide) ( ADOEC)with aliphatic diamines and 1,3-diamino-2-hydroxypropane. The polycondensation occurs at room temperature in solution without added catalyst. Dipolar aprotic solvents which include dimethyl sulfoxide, N- methyl - 2- pyrrolidone and dimethylformamide were used as solvents for polymerization. The selective N-acylation of two active diesters was performed as a model reaction study.
文摘The high activ penta-coordinated silicon potassium compound was prepared by the reaction of amorphous silica with the ethylene glycol,catalyzed by the potassium hydroxide,and the ethyl tetra-coordinated silicon compound was synthesized by the reaction of this penta-coordinate silicon potassium compound with allyl chloride.Then the copolymer was prepared by the reactwn of this ethyl tetra-coordinated silicon with the methyl-acrylic acid β-hydroxyl ethyl ester,and its structure and thermal property were characterized by IR,TG,DSC et al.IR indicated the reaction has finished because of no absorption near 1630cm-1.TG indicated the decomposing temperature of copolymer is 300 ℃.DSC indicated the glass transition temperature is 63.1℃.The copolymer was not soluble in any solvent and had no melt-point.All analysis proved the copolymer exists some extent linkage.
