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Nonlinear shear response of fluid polymers during periodic deformation. Basic harmonics

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Conclusions

1. A model with a relaxation spectrum independent of accumulated elastic strains describes the combination of data on the amplitude and frequency dependences of the components of the shear modulus in terms of basic harmonics for low-molecular-weight polyisobutylene and a filled-polyethylene melt.

2. The greater the amplitude of the shear strain, the broader the region of invariance of the relaxation functions relative to the amplitude of the rate of oscillatory shear.

3. The kinetic λ(s) function affects the amplitude dependences of the modulus in terms of basic harmonics. Its effect is significantly greater on the real component of the modulus than on the imaginary one.

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Additional information

Institute of Polymer Mechanics, Academy of Sciences of the Latvian SSR, Riga. Translated from Mekhanika Polimerov, No. 6, pp. 1093–1100, November–December, 1977.

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Tsiprin, M.G. Nonlinear shear response of fluid polymers during periodic deformation. Basic harmonics. Polymer Mechanics 13, 913–919 (1977). https://doi.org/10.1007/BF00867002

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Keywords

  • Polymer
  • Shear Modulus
  • Shear Strain
  • Frequency Dependence
  • Elastic Strain