Rheology pp 325-330 | Cite as

Application of a Thermodynamically Based Single Integral Constitutive Equation to Stress Relaxation and Yield in ABS

  • C. J. Aloisio
  • R. A. Schapery


The main variation in linear viscoelastic time-dependent properties at different temperatures can be incorporated into the time scale.1 When properties are a function of stress and strain — termed non-linear viscoelastic — it is often possible to use modulus and time scaling with respect to these variables.2,3 The analytical framework supplied by Schapery’s single integral constitutive equation based on a thermodynamic theory,3,4,5 provides a rational approach to the characterization of linear and non-linear viscoelastic behavior. Initially developed in a generalized three-dimensional form,5 simplified uniaxial forms have been frequently used in polymer characterization.2,6


Stress Relaxation Relaxation Modulus Constant Crosshead Speed Stress Relaxation Data Nonlinear Viscoelastic Material 
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  1. 1.
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    Schapery, R. A.: “On the Characterization of Nonlinear Viscoelastic Materials,” Polymer Eng. & Sci., 9, July, 1979, pp. 295–310.CrossRefGoogle Scholar
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    Schapery, R. A.: “Application of Thermodynamics to Thermo-mechanical, Fracture & Birefringent Phenomena in Viscoelastic Media,” J. Phys., 35, 1964, pp. 1451–1465.MathSciNetADSGoogle Scholar
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    Aloisio, C. J.: The Application of a Nonlinear Viscoelastic Theory to the Characterization of an ABS Plastic. Ph.D. Thesis Purdue University, June, 1970.Google Scholar
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    DeGroot, S. R.: Thermodynamics of Irreversible Processes, North-Holland Publishing Co., Amsterdam, 1951.Google Scholar
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Copyright information

© Plenum Press, New York 1980

Authors and Affiliations

  • C. J. Aloisio
    • 1
  • R. A. Schapery
    • 2
  1. 1.Bell LaboratoriesNorcrossUSA
  2. 2.Department of Civil Eng.Texas A&M UniversityCollege StationUSA

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