Title :
Physical ageing influence on chains dynamic of polycarbonate by thermo-stimulated currents (TSC)
Author :
Delbreilh, L. ; Bernes, Alain ; Lacabanne, C.
Author_Institution :
Lab. Phys. des Polymeres, Univ. Paul Sabatier, Toulouse, France
Abstract :
The physical ageing in amorphous polymer, polycarbonate, is studied by complementary techniques: thermally stimulated currents (TSC) and differential scanning calorimetry (DSC). The enthalpy relaxation is described using the Tool, Narayanaswamy and Moynihan (TNM) phenomenological model where the relaxation time τH(T,Tf) depends both on temperature T and fictive temperature Tf characteristic of the glass structure. We have shown the structural dependence of enthalpy relaxation time give prominence to the compensation law observed in dielectric relaxation times.
Keywords :
ageing; amorphous state; dielectric relaxation; differential scanning calorimetry; enthalpy; glass structure; polymers; thermally stimulated currents; Tool-Narayanaswamy-Moynihan phenomenological model; amorphous polymer; chains dynamic; dielectric relaxation times; differential scanning calorimetry; enthalpy relaxation; fictive temperature; glass structure; physical ageing influence; polycarbonate; structural dependence; thermally stimulated currents; Aging; Amorphous materials; Calorimetry; Dielectric measurements; Glass; Heating; Instruments; Polarization; Polymers; Temperature dependence;
Conference_Titel :
Solid Dielectrics, 2004. ICSD 2004. Proceedings of the 2004 IEEE International Conference on
Print_ISBN :
0-7803-8348-6
DOI :
10.1109/ICSD.2004.1350293
