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(Co‐)Polyesters Derived from Isosorbide and 1,4‐Cyclohexane Dicarboxylic Acid and Succinic Acid
Author(s) -
Garaleh Mazen,
Yashiro Takao,
Kricheldorf Hans R.,
Simon Peter,
Chatti Saber
Publication year - 2010
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200900656
Subject(s) - isosorbide , cyclohexane , copolyester , succinic acid , adipic acid , glass transition , dicarboxylic acid , polyester , polymer chemistry , condensation polymer , chemistry , materials science , polymer , organic chemistry
The homopolyester of isosorbide and cis – trans 1,4‐cyclohexane dicarboxylic acid (CHDA) was prepared by three different methods, but only polycondensation of isosorbide and CHDA dichloride yielded a satisfactory molecular weight (corrected $\overline M _{\rm n} $ = 11 000 Da). For the best sample the MALDI‐TOF mass spectrum revealed a high content of cycles. The homopolyester of CHDA and isomannide or isoidide was prepared analogously. For the homopolyesters of CHDA high glass transition temperatures were found ( T g = 146 °C for isosorbide, 133 °C for isomannide, and 115 °C for isoidide), whereas the polyester of isosorbide and succinic acid (SuA) has a T g around 77 °C. Copolyester of isosorbide and various molar ratios of CHDA and SuA were prepared by two different methods, but only rather low molecular weights were obtained. SEC measurements with and without “universal calibration” revealed that the normal calibration with polystyrene overestimates the real molecular weights by 30–45%.