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Biobased Aliphatic Polyesters with DOPO Substituents for Enhanced Flame Retardancy
Author(s) -
Pospiech Doris,
Korwitz Andreas,
Komber Hartmut,
Jehnichen Dieter,
Häußler Liane,
Scheibner Holger,
Liebmann Michael,
Jähnichen Klaus,
Voit Brigitte
Publication year - 2015
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.201500121
Subject(s) - diol , limiting oxygen index , sebacic acid , adipic acid , polymer chemistry , monomer , thermogravimetric analysis , materials science , glass transition , polyester , dicarboxylic acid , condensation polymer , methylene , organic chemistry , succinic acid , chemistry , pyrolysis , polymer , char
Linear aliphatic copolyesters consisting of the biobased diols ethylene glycol, 1,3‐propane diol, and 1,4‐butane diol, the biobased dicarboxylic acids succinic acid, adipic acid, and sebacic acid, and a 9,10‐dihydro‐9‐oxa‐10‐phospha‐phenanthren‐10‐oxide (DOPO)‐containing diol or dicarboxylic acid are presented. Structural characteristics of the new copolyesters are studied by 1 H and 13 C NMR spectroscopy. The influence of chemical composition on the property profile is examined evaluating glass transition temperature T g , melting behavior, thermal degradation and combustion, mechanical and burning behavior. Incorporation of DOPO monomers suppresses crystallization and yields materials with reduced toughness except in case of sebacates. T g rises with the content of DOPO monomer. Correlations between the number of methylene groups in the repeating unit and the thermogravimetric analysis degradation maximum, as well as the heat release capacity from pyrolysis combustion flow calorimeter reflect the systematic influence of chemical structure. Copolycondensation with DOPO monomers enhances the limiting oxygen index providing materials with improved overall value.