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Titolo:
TEMPERATURE AND STRAIN-RATE DEPENDENCE OF YIELD STRESS OF POLYETHYLENE
Autore:
BROOKS NWJ; DUCKETT RA; WARD IM;
Indirizzi:
UNIV N LONDON,SCH POLYMER TECHNOL,HOLLOWAY RD LONDON N7 8DB ENGLAND UNIV LEEDS,IRC POLYMER SCI & TECHNOL LEEDS LS2 9JT W YORKSHIRE ENGLAND
Titolo Testata:
Journal of polymer science. Part B, Polymer physics
fascicolo: 12, volume: 36, anno: 1998,
pagine: 2177 - 2189
SICI:
0887-6266(1998)36:12<2177:TASDOY>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
DEFORMATION; DISLOCATIONS; POLYMERS;
Keywords:
YIELD; POLYETHYLENE; STEM LENGTH; CRYSTAL PLASTICITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
27
Recensione:
Indirizzi per estratti:
Citazione:
N.W.J. Brooks et al., "TEMPERATURE AND STRAIN-RATE DEPENDENCE OF YIELD STRESS OF POLYETHYLENE", Journal of polymer science. Part B, Polymer physics, 36(12), 1998, pp. 2177-2189

Abstract

The yield stress behavior of a range of polyethylene materials which differ with respect to their short chain branch content has been studied. Measurements carried out over a wide range of temperatures have shown that there is a sudden transition in the behavior of the yield stress at a temperature which is dependent on both the grade of material and the applied strain rate. These results are in agreement with previous results found from analysis of the yield strain behavior. Above the transition temperature the materials all behave in a nonlinear viscoelastic manner, and the yield process is considered as being propagation controlled. Below the transition temperature the materials all behave in an elastic-plastic manner, and the yield process is considered as being nucleation controlled. Below the transition temperature the temperature dependence of the yield stress is determined by the thickness of the crystalline lamellae. (C) 1998 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 36: 2177-2189, 1998.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/09/20 alle ore 05:59:39