Molecular weight dependence of viscoelastic properties for symmetric poly(styrene- b -2-vinylpyridine)s in the nanophase separated molten states

Viscoelastic properties of symmetric poly(styrene-b-2-vinylpyridine)s (SP), whose thermorheological properties of components are identical, are studied over a wide range of molecular weight M for nanophase separated melts. Plateau modulus G0N for SP was almost the same with those of components. At low angular frequency ω, power law behavior of dynamic moduli of SP, G*SP ∼ ω0.5, is observed. When a universal liquid-like behavior exists between plateau and power law regions for G*SP, the latter can be attributed to motions of grains/defects. By subtracting the responses from grains/defects from G*SP, the responses from component chains, ΔG*chain, are obtained. At M/Me 1.5–2, ⟨τ⟩w can be fitted to exp(νM/Me) with ν = 2, implying that the retraction mode becomes dominant for relaxation of entangled SP. At M/Me > 6–7, the power law behavior is smooth...

[1]  Y. Matsushita,et al.  Viscoelastic Properties of Low Molecular Weight Symmetric Poly(styrene-b-2-vinylpyridine)s in the Ordered and Disordered States under Steady Shear Flow , 2013 .

[2]  Y. Matsushita,et al.  A Separation Method of Responses from Large Scale Motions and Chain Relaxations for Viscoelastic Properties of Symmetric Poly(styrene-b-2-vinylpyridine)s in the Ordered State , 2013 .

[3]  Tadashi Inoue,et al.  Rheo-Optical Study of Viscoelastic Relaxation Modes in Block Copolymer Micellar Lattice System , 2012 .

[4]  O. Urakawa,et al.  Rheo-Optical Study on Dynamics of Bottlebrush-Like Polymacromonomer Consisting of Polystyrene. II. Side Chain Length Dependence on Dynamical Stiffness of Main Chain , 2012 .

[5]  M. Wilhelm,et al.  New Insight to the Mechanism of the Shear-Induced Macroscopic Alignment of Diblock Copolymer Melts by a Unique and Newly Developed Rheo–SAXS Combination , 2012 .

[6]  Y. Matsushita,et al.  Hysteresis Behavior in Shear Rate Dependence of First Normal Stress Difference of Diblock Copolymers in Ordered State near Order-Disorder Transition , 2007 .

[7]  Hideaki Yokoyama,et al.  Diffusion of block copolymers , 2006 .

[8]  Timothy P. Lodge,et al.  Block Copolymers: Past Successes and Future Challenges , 2003 .

[9]  Y. Matsushita.  Studies on equilibrium structures of complex polymers in condensed systems , 2000 .

[10]  H. Watanabe.  Viscoelasticity and dynamics of entangled polymers , 1999 .

[11]  U. Wiesner,et al.  Rheology of lamellar polystyrene-block-polyisoprene diblock copolymers , 1998 .

[12]  U. Wiesner.  Lamellar diblock copolymers under large amplitude oscillatory shear flow: order and dynamics , 1997 .

[13]  T. Itoh,et al.  Polymerization behavior of electron‐accepting substituted quinodimethanes , 1997 .

[14]  Y. Matsushita,et al.  Viscoelastic Properties of Poly(2-vinylpyridine) in Bulk and Solution , 1996 .

[15]  I. Noda,et al.  Shear-rate dependence of first normal stress difference of poly(isoprene-b-styrene) in solution near the order—disorder transition temperature , 1996 .

[16]  Glenn H. Fredrickson,et al.  Dynamics of Block Copolymers: Theory and Experiment , 1996 .

[17]  M. Doi,et al.  Experimental tests of the scaling relation for textured materials in mixtures of two immiscible fluids , 1994 .

[18]  M. Rubinstein,et al.  Power-law-like stress relaxation of block copolymers. Disentanglement regimes , 1993 .

[19]  Takao Ohta,et al.  Dynamics and rheology of complex interfaces. I , 1991 .

[20]  C. Han,et al.  Chain conformations and locations of parts of a block polymer in a lamellar structure , 1990 .

[21]  Kawasaki,et al.  Dynamics and rheology of diblock copolymers quenched into microphase-separated states. , 1990, Physical review. A, Atomic, molecular, and optical physics.

[22]  Y. Mogi,et al.  Chain conformation of a block polymer in a microphase-separated structure , 1990 .

[23]  Glenn H. Fredrickson,et al.  Fluctuation effects in a symmetric diblock copolymer near the order–disorder transition , 1990 .

[24]  T. Witten,et al.  Stress relaxation in the lamellar copolymer mesophase , 1990 .

[25]  G. Fredrickson,et al.  Block copolymer thermodynamics: theory and experiment. , 1990, Annual review of physical chemistry.

[26]  Y. Matsushita,et al.  Preparation and Characterization of Poly(2-vinylpyridine) with Narrow Molecular Weight Distributions , 1986 .

[27]  F. Bates.  Block copolymers near the microphase separation transition. 2. Linear dynamic mechanical properties , 1984 .

[28]  Mikael Rigdahl,et al.  Stress relaxation behaviour of plasticized poly (vinyl chloride) , 1982 .

[29]  G. Marin,et al.  Concentration and molecular weight dependence of viscoelastic properties in linear and star polymers , 1981 .

[30]  L. Leibler.  Theory of Microphase Separation in Block Copolymers , 1980 .