Effect of temperature on the viscoelastic and viscoplastic behavior of polypropylene

被引：29

作者：

Drozdov, A. D. ^{[1
]}

机构：

[1] Danish Technol Inst, Taastrup 2630, Denmark

来源：

MECHANICS OF TIME-DEPENDENT MATERIALS | 2010年 / 14卷 / 04期

关键词：

Polypropylene; Viscoelasticity; Viscoplasticity; Thermal effects; Constitutive modeling; ISOTACTIC POLYPROPYLENE; STRESS-RELAXATION; CREEP-BEHAVIOR; TENSILE CREEP; STRAIN-RATE; SEMICRYSTALLINE POLYMERS; MECHANICAL RELAXATIONS; GLASS-TRANSITION; COPOLYMER BLENDS; ALPHA-TRANSITION;

D O I：

10.1007/s11043-010-9118-5

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Observations are reported on isotactic polypropylene in tensile tests with various cross-head speeds and relaxation tests in a wide interval of temperatures ranging from room temperature to 120A degrees C. A constitutive model is derived for the viscoelastic and viscoplastic responses of a semicrystalline polymer at arbitrary deformations with small strains. The stress-strain relations involve 6 adjustable parameters that are found by fitting the experimental data. The presence of a critical temperature is demonstrated at which some parameters of the model reach their maxima. This temperature is associated with the alpha-relaxation temperature of polypropylene.

引用

页码：411 / 434

页数：24

共 40 条

[1] The effect of temperature and strain rate on the mechanical properties of highly oriented polypropylene tapes and all-polypropylene composites [J].