Non-linear long-term tensile creep of poly(propylene)/cycloolefin copolymer blends with fibrous structure

0189395 - UMCH-V 20033350 RIV DE eng J - Článek v odborném periodiku
Kolařík, Jan - Pegoretti, A. - Fambri, L. - Penati, A.
Non-linear long-term tensile creep of poly(propylene)/cycloolefin copolymer blends with fibrous structure.
Macromolecular Materials and Engineering. Roč. 288, č. 8 (2003), s. 629-641. ISSN 1438-7492. E-ISSN 1439-2054
Grant CEP: GA AV ČR IAA4050105
Výzkumný záměr: CEZ:AV0Z4050913
Klíčová slova: compliance * creep * non-linear viscoelasticity
Kód oboru RIV: CD - Makromolekulární chemie
Impakt faktor: 1.170, rok: 2003

Increasing creep strain of materials with PoissonŽs ratio smaller than 0.5 generates additional free volume, which accounts for a continuous shortening of retardation times. The shift factor along the time scale in the time-strain superposition is not constant, but monotonically rises with the elapsed creep time. Generalised creep dependence related to a pseudo iso-free-volume state can be transformed into a real long-term creep curve for a selected stress.
Trvalý link: http://hdl.handle.net/11104/0085206