Structural Change in Glassy Poly(methyl methacrylate)during Stop-Start Stretching

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概要

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• We measured the complex shear modulus, G^*=G'+iG", of glassy poly(methyl methacrylate) (PMMA) during its stop-start stretching processes to investigate the relationship between change in mechanical properties due to aging under a finite strain and relaxation of strain-induced nonequilibrium structures. The yield stress as well as the tensile modulus at the beginning of the re-stretching increased with aging time beyond their initial values in the undeformed state, showing the effect of strain aging appeared in these quantities. The storage shear modulus G' also increased with time elapsed in the stress relaxation period. The development of tensile modulus was observed to be much faster than that of the storage shear modulus. As time scales used for the dynamic measurement is much shorter than that for the macroscopic straining, evolution of tensile modulus due to aging under a finite strain is not ascribable only to the relaxation of nonequilibrium glassy structures induced by large deformation.

• 社団法人日本材料学会の論文
• 2001-12-15

著者

• NANZAI Yukuo

  Department of Mechanical Engineering, Osaka City University

• Nanzai Y

  Osaka City Univ. Osaka Jpn

• Nanzai Yukuo

  Department Of Mechanical Engineering Osaka City University

• Yoshioka S

  Department Of Mechanical Engineering Osaka City University

• NOBATA Yasuhiro

  Department of Mechanical Engineering, Osaka City University

• Nobata Yasuhiro

  Department Of Mechanical Engineering Osaka City University

• Nanzai Yukuo

  Department Of Mechanical And Physical Engineering Graduate School Of Engineering Osaka City Universi

関連論文

• Plastic Deformation and Non-Newtonian Flow in Glassy Polycarbonate
• Non-Newtonian Flow in Polymethyl Methacrylate Glass under Simple Shear Condition
• Deformation Recovery of Largely Deformed Epoxy Resin
• DUCTILITY OF UNIAXIALLY THERMOFORMED SHEET OF POLYMETHYL METHACRYLATE
• Molecular Weight Dependence of Viscosity Compensation Effect for Non-Newtonian Viscous Flow in Poly(methyl methacrylate) Glass
• Plastic Deformation Mechanism in PMMA under Creep Stress
• Aging in Quenched Poly(methyl methacrylate) under Inelastic Tensile Strain
• Nonlinear Rheology in Glassy Polymers
• Structural Change in Glassy Poly(methyl methacrylate)during Stop-Start Stretching
• Aging in Fully Annealed and Subsequently Strained Poly(methyl methacrylate)
• Mechanical and Thermal Analysis of Aging in Strained Polymethyl Methacrylate
• STRAIN RECOVERY BEHAVIORS AT HEATING FOR GLASSY POLYMETHYL METHACRYLATE LARGELY STRETCHED WITH STRAIN RATE JUMPS
• Aging in Quenched Poly(methyl methacrylate)under the Condition of Tensile Strain
• Nonlinear Rheology in Glassy Polymers
• Molecular Weight Dependence of Viscosity Compensation Effect for Non-Newtonian Viscous Flow in Poly(methyl methacrylate) Glass

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