Autor: Nicolas Spassky, Mihailo S. Jaćović, Jasna Djonlagić, Maurice Sepulchre, Branco Dunjić, Marie‐Odile Sepulchre
Rok vydání: 1990
Předmět:
Zdroj: Die Makromolekulare Chemie. 191:1529-1543
ISSN: 0025-116X
DOI: 10.1002/macp.1990.021910706
Popis: The reaction of dicarboxylic acid potassium salts with dibromo derivatives in 1-methyl-2-pyrrolidone at moderate temperature was applied to the synthesis of high-molecular-weight co- and terpolyesters containing fumaric, maleic, phthalic and succinic ester residues and tetramethylene groups. Co- and terpolyesters with a random structure were obtained from the reaction of binary or ternary mixtures of salts with 1,4-dibromobutane. While the composition in ester residues of the organic phase varies continuously during the first 6 h of the polycondensation reaction, that of the copolyesters obtained after 24 h is determined by the composition of the initial mixture of salts. The relative amounts of cyclic n-mers produced in the course of the reaction and those of the different possible dimers were evaluated from GPC analyses of the reaction products. Multi-block copolyesters were prepared either by the reaction of a potassium salt with a mixture of 1,4-dibromobutane and a low-molecular-weight α-ω-dibromopolyester or by the coupling reaction of two low-molecular-weight α,ω-dibromopolyesters with succinic acid potassium salt. The reaction of bis(4-bromobutyl) phthalate and fumaric or maleic acid potassium salt produced the corresponding alternating copolyesters. Physico-chemical and compositional data of the prepared unsaturated copolyesters are given.
Databáze: OpenAIRE
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