Viscoelastic Behavior of Scarcely Crosslinked Poly(dimethyl siloxane) Gel
スポンサーリンク
概要
- 論文の詳細を見る
Linear viscoelastic behavior was investigated for a poly(dimethyl siloxane) (PDMS) gel formed through a bulk double-liquid crosslinking reaction of two types of vinyl-terminated PDMS prepolymers of the molecular weights Mpre ≈ 35×103. Time-temperature superposition worked, and master curves at 20 °C were constructed for the storage and loss moduli, G and G", in a wide range of angular frequency ω (= 103 −10−5 s−1) by combining the data obtained from dynamic oscillatory tests and creep tests. With decreasing ω to 10−1 s−1, G" decreased in proportion to ω0.6 and G rapidly decreased to its equilibrium plateau at the modulus Ge = 2800 Pa. On a further decrease of ω well in the plateau regime of G, G" decreased in proportion to ω0.3. Thus, the gel exhibited the fast and slow relaxation processes characterized with these types of power-law behavior of G". The molecular weight between the crosslinks evaluated from the Ge data (as well as the equilibrium swelling ratio in toluene), Mc ≈ 340 ×103, was about ten times larger than Mpre. The crosslinking reaction was made in the bulk state but still gave such a scarce gel network (with Mc ≈ 10 Mpre) possibly because a large amount of sol chains and dangling chains had diluted the trapped entanglements during the reaction. From the analysis of the G and G" data on the basis of the above Mc value and the intrinsic Rouse relaxation time, the fast relaxation process was assigned as the Rouse-like constraint release (CR) process of individual gel strands. The polydispersity of the strands was found to be essential for the power-law behavior (G"∝ωn with n ≈ 0.6) to be observed in the plateau regime of G. The slow relaxation process was related to fluctuation of the crosslinking points, which is equivalent to cooperative Rouse-CR motion of many gel strands connected at these points.
- 一般社団法人 日本レオロジー学会の論文
著者
-
Watanabe Hiroshi
Institute for Chemical Research, Kyoto University
-
Takahashi Hideaki
Toray Research Center Inc.
-
ISHIMURO Yoshitaka
Toray Research Center Inc.
関連論文
- Rheological and Dielectric Behavior of Polyisoprene under Pressurized Carbon Dioxide
- Xanthine Oxidase Inhibitory Activity of Vietnamese Medicinal Plants(Pharmacognosy)
- Viscoelastic Mode Distribution of Moderately Entangled Linear Polymers
- Investigation on traditional medicine in Myanmar and Vietnam
- Viscoelastic Properties of Poly(vinyl chloride) Gels : Effect of Plasticizer Type
- Dielectric Behavior of PVC Gels and Sols in Dioctyl Phthalate
- Anticonvulsant Activity of Paeonimetabolin-I Adducts Obtained by Incubation of Paeoniflorin and Thiol Compounds with Lactobacillus brevis
- Primitive chain network simulations of conformational relaxation for individual molecules in the entangled state (2) Retraction from stretched states (計算機レオロジー特集号)
- Primitive Chain Network Simulations of Conformational Relaxation for Individual Molecules in the Entangled State
- Primitive Chain Network Simulations on Dielectric Relaxation of Linear Polymers under Shear Flow
- Apparatus for Small-Angle Neutron Scattering and Rheological Measurements under Sheared Conditions
- Multiple Representation of Linear Dielectric Response
- Wild Ginseng Grows in Myanmar
- Non-Equilibrium Relaxation Analysis on Two-Dimensional Melting(The 50th Anniversary of the Alder Transition -Recent Progress on Computational Statistical Physics-)
- Nonlocal Unitary Transformation and Haldane State in S=1/2 Antiferromagnetic Ladder Model
- Positron Lifetime in C_/C_ Powder
- Rheo-SANS Study of an Aqueous Suspension of Poly(Methyl Methacrylate-co-Styrene) Particle
- Rheology of Aqueous Suspensions of Polystyrene Particles with Bimodal Radius Distribution
- Kinetics of Living Anionic Polymerization of Polystyrenyl Lithium in Cyclohexane
- Chain Relaxation Time in ABS Polymer Melts
- Highly Isotactic Poly(vinyl alcohol) Derived from tert-Butyl Vinyl Ether V. Viscoelastic Behavior of Highly Isotactic Poly(vinyl alcohol) Films
- Kinetics of Anionic Polymerization of Polybutadienyl Lithium in Benzene : An Osmotic Effect on Propagation Process
- Viscoelastic Behavior of Scarcely Crosslinked Poly(dimethyl siloxane) Gels: 2. Effects of Sol Component and Network Strand Length
- A Note for Kohlrausch-Williams-Watts Relaxation Function
- Thermal, Structural, and Viscoelastic Characterization of cis-Poly(phenylene vinylene) Related to its Photo-Isomerization
- Stress Overshoot in Shear Flow of an Entangled Polymer with Bimodal Molecular Weight Distribution
- Efficient Implementations of Molecular Dynamics Simulations for Lennard-Jones Systems(General and Mathematical Physics)
- Dynamics of Monofunctional Polybutadienyl Lithium Chains Aggregated in Benzene
- Viscoelastic Behavior of Scarcely Crosslinked Poly(dimethyl siloxane) Gel : 3. Examination of Gelation Process
- Nonlinear Mechanical Behavior of Scarcely Crosslinked Poly(dimethyl siloxane) Gel : Effect of Strand Length Polydispersity
- Viscoelastic Behavior of Scarcely Crosslinked Poly(dimethyl siloxane) Gel
- Primitive Chain Network Simulations on Dielectric Relaxation of Linear Polymers under Shear Flow
- Rheo-SANS Study of an Aqueous Suspension of Poly (Methyl Methacrylate-co-Styrene) Particle
- Rheology of Aqueous Suspensions of Polystyrene Particles with Bimodal Radius Distribution
- Effects of Self-efficacy on Adjustment to College
- Viscoelastic Behavior of Scarcely Crosslinked Poly(dimethyl siloxane) Gels : 2. Effects of Sol Component and Network Strand Length
- Viscoelastic Behavior of Scarcely Crosslinked Poly(dimethyl siloxane) Gel
- Dynamic Tube Dilation in Branched Polymers(Non Equilibrium Soft Matter)
- Rheology of Aqueous Solution of Hydrophobically Modified Ethoxylated Urethane (HEUR) with Fluorescent Probes at Chain Ends : Thinning Mechanism