The Nonlinear Viscoelastic Response of Glassy Polymers Subjected to Physical Aging

Drozdov, Aleksey D.

doi:10.1002/1521-3919(20010601)10:5<491::aid-mats491>3.0.co;2-g

Cited by 3 publications

(2 citation statements)

References 52 publications

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“…Additionally, the difference in stress state between the two experiments could contribute to a difference in relaxation behavior. Drozdov [29] found that the relaxation rate decreases from torsion to compression to tension. It is also possible that a difference in environmental conditions of the two experiments resulted in a variation in the measured behavior.…”

Section: Full Curementioning

confidence: 99%

Cure-dependent Viscoelastic Poisson’s Ratio of Epoxy

2007

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The evolution of the lateral contraction ratio of two commercial (high and low temperature cure) epoxy resins is studied in uniaxial tension using moiré interferometry. The ratio of transverse to axial strains evolves from an elastic value of about 0.40 to a rubbery plateau value of 0.49 at long times. Furthermore, the data indicate that the contraction ratio follows timetemperature superposition with a shift function indistinguishable from other axial viscoelastic functions. The lateral contraction behavior at several cure states past gelation was measured and a model is proposed to describe the cure dependence.

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Section: Full Curementioning

confidence: 99%

Cure-dependent Viscoelastic Poisson’s Ratio of Epoxy

2007

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“…With the curves overlapping, the part of the curve at a short time interval was used, mainly because the parts of the curve at a long time interval sometimes deviate from the smooth master curve. It has been reported that this nonlinear behavior is based on the depression effect of physical aging (8), (9) . The results for the other pre-aged materials had the same tendency as the result obtained using the standard method.…”

Section: The Effect Of Physical Aging On Creep Behaviormentioning

confidence: 99%

Viscoelasticity of Shape Memory Polymer: Polyurethane series DiARY

Sakai

Tao

Somiya

2007

JMMP

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This study examined the creep behavior of DiARY ® , a shape-memory polymer (SMP), and the factors influencing the creep behavior. The creep test using the short term method obtained the master curve for the creep compliance, and confirmed the time-temperature superposition principle. Using this method, physical aging has little effect on the results of the creep test. To examine the effects of physical aging, we performed the creep test without using this method, which showed that physical aging alters the energy of activation of DiARY and the time-physical age time dependency at a specific temperature. The aging master curves were obtained as very smooth curves. In addition, the aging shift factors were attained when creating the aging master curves. The effect of physical aging depended on the time and temperature, confirming the time-physical aging time superposition principle, and achieved the effect of physical aging described as the aging shift rate. Using the master curve, time-temperature shift factor, and aging shift rate, it was possible to estimate the creep deformation, including the effect of physical aging on creep behavior.

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Estimating creep deformation of glass-fiber-reinforced polycarbonate

Sakai

Somiya

2006

Mech Time-Depend Mater

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The Nonlinear Viscoelastic Response of Glassy Polymers Subjected to Physical Aging

Cited by 3 publications

References 52 publications

Cure-dependent Viscoelastic Poisson’s Ratio of Epoxy

Cure-dependent Viscoelastic Poisson’s Ratio of Epoxy

Viscoelasticity of Shape Memory Polymer: Polyurethane series DiARY

Estimating creep deformation of glass-fiber-reinforced polycarbonate

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