Nonlinear Viscoelastic Properties and Change in Entanglement Structure of Linear Polymers : 2. Double-step Large Shearing Deformations at Moderately Long Time-scale
スポンサーリンク
概要
- 論文の詳細を見る
Simultaneous measurements of stress relaxation and differential dynamic modulus were made at 268K for nearly monodisperse polybutadiene (Mw=2.2×105, 1,2-structure 70%, Me=3.6×103) and also one having coarse cross-linking (Mc=2.6×104) in double-step large shearing deformations with intermittently superposed small oscillations at a frequency of 0.1Hz, which falls in the middle of the rubbery plateau zone of the polymer. The first and the second strains, γ1 and γ2, were applied with a time interval t1. γ1 was constant 1.0. γ2 was varied from 1.0 to −2.0. t1 was 1000s being several times longer than τk, after which time-strain separability relationship holds in nonlinear relaxation modulus. Relaxation of stress after the second strain did not agree with BKZ prediction at −(3/2) γ1<γ2<0 for the uncross-linked sample, but it agreed at any γ2 for the corss-linked sample. At −(3/2) γ1<γ2<0, the uncross-linked sample showed irreversible change in the height of rubbery plateau, while the cross-linked sample showed reversible change. Such the differences between the two samples are discussed in terms of the two origins for nonlinear viscoelasticity of well entangled polymers, chain anisotropy and disentanglement.
- 一般社団法人 日本レオロジー学会の論文
- 2003-09-15
著者
-
Isono Yoshinobu
Department of Chemistry, Nagaoka University of Technology
-
Kawahara Seiichi
Department of Chemistry, Nagaoka University of Technology
-
Kase Toshio
Research and Development Center, Zeon Corporation
-
Kawahara Seiichi
Department Of Agricultural Chemistry College Of Agriculture University Of Osaka Prefecture:(present
-
Kawahara Seiichi
Department Of Chemistry Nagaoka University Of Technology
-
Isono Yoshinobu
Department Of Chemistry Faculty Of Engineering Nagaoka University Of Technology
-
Isono Yoshinobu
Department Of Chemistry Nagaoka University Of Technology
-
Kase Toshio
Research And Development Center Zeon Corporation
関連論文
- Nonlinear Viscoelastic Properties and Change in Entanglement Structure of Linear Polymers 2. Double-step Large Shearing Deformations at Moderately Long Time-scale
- Lower Critical Solution Temperature Phase Behavior of Natural Rubber/Polybutadiene Blend
- Nonlinear Viscoelastic Properties of Mochi Cake(Food & Nutrition)
- Linear Viscoelastic Properties and Tissue Structures of Mochi Cake(Food & Nutrition)
- An Effective Synthesis of (±)-(E)-2-Amino-5-phosphono-3-pentenoic Acid by Palladium(II)-assisted Migration of the Double Bond(Organic Chemistry)
- Crystal Nucleation and Growth of Natural Rubber Purified by Deproteinization and Trans-esterification
- Preparation and Morphology of Model Graft Copolymers of the A_3B_2 Type with Different Graft Junction Points
- Ultrasonic Degradation of Waxy Rice Starch
- Nonlinear Viscoelastic Properties and Change in Entanglement Structure of Linear Polymers : 2. Double-step Large Shearing Deformations at Moderately Long Time-scale
- Mechanical properties and cross-linking structure of cross-linked natural rubber