1H and 13C NMR studies of molecular dynamics in the biocopolymer of glycolide and epsilon-caprolactone.
Copolymers of glycolide and epsilon-caprolactone were studied using differential scanning calorimetry and solid-state NMR. The variation of the T1 relaxation time with temperature reflects local disorder and can be quantified in terms of the distribution of correlation times predicted by the Davidson-Cole model. T, relaxation is dominated by trans-gauche isomerisation, with an activation energy of 34-35 kJ mol(-1).
Nozirov
Farhod
F
Department of Macromolecular Physics, Adam Mickiewicz University, Poznań, Poland.
Szczesniak
Eugeniusz
E
Fojud
Zbigniew
Z
Dobrzynski
Piotr
P
Klinowski
Jacek
J
Jurga
Stefan
S
D001672:Biocompatible Materials / Q000737:chemistry*; D002151:Calorimetry; D002247:Carbon Isotopes; D004146:Dioxanes / Q000737:chemistry*; D008422:Materials Testing / Q000379:methods*; D008956:Models, Chemical; D008958:Models, Molecular; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular / Q000379:methods*; D011091:Polyesters / Q000737:chemistry*; D011522:Protons; D012680:Sensitivity and Specificity; D013696:Temperature
D001672:Biocompatible Materials; D002247:Carbon Isotopes; D004146:Dioxanes; D011091:Polyesters; D011522:Protons; C095495:glycolide E-caprolactone copolymer