Premium
Starch alkanoates as models for thermoplastic polysaccharides
Author(s) -
Pellegrini Claudio,
Tomka Ivan
Publication year - 1998
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19981270107
Subject(s) - starch , polysaccharide , thermal stability , polymer , thermoplastic , polymer chemistry , transesterification , molecule , chemistry , chemical engineering , organic chemistry , range (aeronautics) , materials science , polymer science , composite material , catalysis , engineering
The low degree of internal molecular mobility of stiff polysaccharide chains prevent any thermal transition in the temperature range of their chemical stability. Substituted starches were synthesised to find the structural range, i.e. the necessary amount and length of mobile side chains which support the molecule with high enough level of internal degrees of freedom. Esterification and transesterification with hydroxy alkanoates, their polymers and lactones were used. The reaction was best catalysed with strong delocalised bases. The thermal properties of these model substances were characterised.