TITLE

Phase separations induced by partial stiffening of semiflexible polymers

AUTHOR(S)
Matsuyama, Akihiko; Sumikawa, Yasuo; Kato, Tadaya
PUB. DATE
September 1997
SOURCE
Journal of Chemical Physics;9/22/1997, Vol. 107 Issue 12, p4711
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A simple model is introduced to describe phase separations and nematic ordering in solutions and melts of semiflexible polymer chains, taking into account the partial orientational ordering of flexible bonds on the chain. We obtain the free energy by combining the Flory-Huggins theory for isotropic solutions and the Maier-Saupe model for describing the coupling between the nematic ordering and straightened bonds. Our theory predicts that the partial stiffening of the flexible bonds can be a major cause of miscibility gaps showing a bent chimney shape and triple points. We also discuss the extension of chains in a nematic phase.
ACCESSION #
19381244

 

Related Articles

  • Pressure-induced phase change in poly(tetrafluoroethylene) at modest impact velocities. Rae, Philip J.; Brown, Eric N.; Clements, Bradford E.; Dattelbaum, Dana M. // Journal of Applied Physics;9/15/2005, Vol. 98 Issue 6, p063521 

    Although poly(tetrafluoroethylene) (PTFE) is an unusually ductile polymer, it undergoes an abrupt ductile-brittle transition at modest impact velocities. No previous explanation for this behavior has been found after an extensive literature search. In this paper, we examine the role of a...

  • Kac Polymers. Buttà, Paolo; Procacci, Aldo; Scoppola, Benedetto // Journal of Statistical Physics;May2005, Vol. 119 Issue 3/4, p643 

    We show how a polymer in two dimensions with a self-repelling interaction of Kac type exhibits a diffusive–ballistic transition if considered on the appropriate scale.

  • The effects of defects on electrical properties of Ag2S at phase transition. Aliev, F. F.; Jafarov, M. B.; Eminova, V. I. // Semiconductors;Jun2010, Vol. 44 Issue 6, p719 

    The temperature dependences of electrical conductivity σ( T) and the Hall coefficient R(T) in Ag2S at the phase transition have been studied. Qualitative discrepancies in the changes in σ(T) and R(T) in the case of phase transition have been revealed; i.e., σ increases by several orders...

  • Description of Phase Separation in Solid 3He–4He Mixtures Based on the Diffusion Mechanism. V. Grigor’ev; I. Degtyaryov; S. Sokolov // Journal of Low Temperature Physics;Sep2007, Vol. 148 Issue 5/6, p713 

    Abstract   We present the solution of the one-dimensional diffusion problem that describes the decay kinetics of solid 3He–4He mixtures taking into account the diffusion processes in both phases of the stratified solution and the surface resistance of the interphase...

  • Localization-Delocalization Transition in Chains with Correlated Disorder. Kaya, Tuncer // AIP Conference Proceedings;2007, Vol. 899 Issue 1, p613 

    We investigate numerically localization properties of electron eigenstates in a chain with long-range correlated diagonal disorder. A tight binding one-dimensional model with on-site energies exhibiting long-range correlated disorder (LRCD) is considered for a various disorder strength W. LRCD...

  • Bipolar-homogeneous structural phase transition in nematic droplets formed in the polymer matrix in a magnetic field. Parshin, A. M.; Nazarov, V. G.; Zyryanov, V. Ya.; Shabanov, V. F. // Crystallography Reports;Dec2009, Vol. 54 Issue 7, p1191 

    The phase transition from the bipolar structure to the homogeneous structure in droplets formed from the nematic liquid crystal 4- n-pentyl-4′-cyanobiphenyl in poly(vinyl butyral) in the presence of a magnetic field has been investigated. The phase transition is associated with the...

  • Effect of polydispersity on the tensile modulus of diblock copolymers in a lamellar phase. Ying Jiang; Rui Huang; Haojun Liang // Journal of Chemical Physics;9/22/2005, Vol. 123 Issue 12, p124906 

    We have calculated the tensile moduli of nanomaterials having lamellar microstructures prepared through the self-assembly of a polydisperse diblock copolymer. We observed that the extensional moduli K33 provided the major contribution to the tensile modulus and that the value of K33 depended...

  • Phase Transitions for the Growth Rate of Linear Stochastic Evolutions. Yoshida, Nobuo // Journal of Statistical Physics;Dec2008, Vol. 133 Issue 6, p1033 

    We consider a discrete-time stochastic growth model on d-dimensional lattice. The growth model describes various interesting examples such as oriented site/bond percolation, directed polymers in random environment, time discretizations of binary contact path process and the voter model. We study...

  • Critical Density Points for Threshold Voter Models on Homogeneous Trees. Xue, Xiaofeng // Journal of Statistical Physics;Jan2012, Vol. 146 Issue 2, p423 

    In this paper we study the threshold voter models on homogeneous trees. We give the definition of the 'critical density' of the models and obtain an estimation of it. Furthermore, we study the exponential rate at which the process converges to an absorbed state δ in the subcritical case. At...

Share

Read the Article

Courtesy of NEW JERSEY STATE LIBRARY

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics