Stress relaxation of polymer solutions under large strain

ABSTRACT Shear relaxation moduli _G_(_t_, _s_) were measured for various strains _s_ with a relaxometer of the cone-plate type for concentrated solutions of polystyrene in chlorinated

biphenyl. The strain was varied from 0.34 to 25 shear units. The time—temperature reduction method was applicable to the shear-dependent relaxation moduli over the temperature range studied

(20—50°C) and the shift factor _a_T was independent of _s_. When _s_ was very large, log_G_(_t_, _s_) decreased very rapidly with increasing time in two regions of _t_ (two-step relaxation)

while log_G_(_t_, _s_) for small _s_ dropped rapidly only at long times (one-step relaxation). The relative rate of decrease of _G_(_t_, _s_) with increasing _s_ was independent of _t_ when

_t_ was larger than a certain time, τ_k_. The maximum relaxation time τ_m_ was independent of _s_ while the corresponding strength of relaxation _G_m was proportional to _ID_−0.83 when _s_

was large. Here _ID_ is the first invariant of strain. SIMILAR CONTENT BEING VIEWED BY OTHERS LINEAR ELASTICITY OF POLYMER GELS IN TERMS OF NEGATIVE ENERGY ELASTICITY Article Open access 11

August 2021 UNIVERSAL MECHANISM OF SHEAR THINNING IN SUPERCOOLED LIQUIDS Article Open access 01 July 2024 UNIVERSAL SCALING LAW OF GLASS RHEOLOGY Article 31 January 2022 ARTICLE PDF

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Download references AUTHOR INFORMATION AUTHORS AND AFFILIATIONS * Institute for Chemical Reseacrh, Kyoto University, Yoshiyuki Einaga, Kunihiro Osaki & Michio Kurata * Department of

Industrial Chemistry, Kyoto University, Shin-ichi Kimura, Nobuhiro Yamada & Mikio Tamura Authors * Yoshiyuki Einaga View author publications You can also search for this author inPubMed 

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permissions ABOUT THIS ARTICLE CITE THIS ARTICLE Einaga, Y., Osaki, K., Kurata, M. _et al._ Stress Relaxation of Polymer Solutions under Large Strain. _Polym J_ 5, 91–96 (1973).

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content-sharing initiative KEYWORDS * Stress Relaxation * Relaxation Time * Large Strain * Nonlinear Behavior * Polystyrene * Solution * Entanglement