Phase separation of liquid crystal–polymer mixtures

Motoyama, Mayumi; Nakazawa, Hatsumi; Ohta, Takao; Fujisawa, Toru; Nakada, Hidetoshi; Hayashi, Mikihiro; Aizawa, Masao

doi:10.1016/s1089-3156(99)00044-6

Cited by 21 publications

(32 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Binary alloys and polymer blends have been extensively studied (see e.g. [10,9]) and systems in which one of the components is a liquid crystal are receiving increased attention [47,53,31,45,12,11,50,40,51,24]. The systems involving liquid crystals are investigated via simulation [47,53,31,45,11] and the phase diagram indicating where transitions between the nematic and isotropic phases of the liquid crystal occur is analyzed [47,53,40].…”

Section: Introductionmentioning

confidence: 99%

Ordering kinetics of a conserved binary mixture with a nematic liquid crystal component

Mata¹,

Garcı́a-Cervera²,

Ceniceros³

2014

Journal of Non-Newtonian Fluid Mechanics

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Ordering kinetics of a conserved binary mixture with a nematic liquid crystal component

Mata¹,

Garcı́a-Cervera²,

Ceniceros³

2014

Journal of Non-Newtonian Fluid Mechanics

View full text Add to dashboard Cite

“…Then, the morphologies of the PDLC involve interplay among three kinetic processes: polymerization, phase separation, and phase ordering. These phase separation dynamics have been simulated by some authors [105][106][107][108].…”

Section: Phase Separation Dynamicsmentioning

confidence: 99%

Thermodynamics of Flexible and Rigid Rod Polymer Blends

Matsuyama

2010

Encyclopedia of Polymer Blends

View full text Add to dashboard Cite

Binary mixtures of a flexible polymer and a low molecular weight liquid crystalline molecule, or a rigid rod-like molecule, are of interest because of their important technological applications in high modulus fibers, nonlinear optics, and electro optical devices. These blends are basic materials for recent new technologies of liquid crystal displays [1,2]. The performances of these systems are closely related to phase separations and conformations of polymer chains dissolved in a liquid crystalline phase. One of the main problems is to examine the location of various phases such as isotropic, nematic, and smectic phases, depending on temperature and concentra tion. To understand the thermodynamics and thermal instability of these blends, it is important to consider the co-occurrences between liquid crystalline ordering and phase separations.Generally, polymer chains exhibit a variety of flexibility, from flexible to rigid rodlike polymers. Polymer blends containing a liquid crystalline ordering have received considerable attention. The volume of literature on the theories and experiments of liquid crystallinity in polymer blends is now very extensive. There are many theoretical models for liquid crystalline polymers, such as the Flory lattice model [3][4][5][6][7][8], wormlike chain model [9][10][11], and Onsager virial theory [12] for rigid rods. An example of a recent review of liquid crystalline polymers is the text book of Donald and Windle [13].In this chapter we introduce the thermodynamics, or phase behavior, of binary mixtures of a flexible polymer and a rigid rod-like molecule. Here the flexible polymer means that liquid crystalline ordering does not occur in the constituent pure polymer. We first describe the fundamentals of a nematic phase, based on the Onsager theory for a rigid rod, where the entropy-induced nematic ordering is discussed. This will be the basis of the following sections. In Section 2.3, we focus on the phase separations of mixtures of a flexible polymer and a rigid rod-like molecule, or a low molecular weight liquid crystalline molecule, in a thermal equilibrium state. We introduce recent theoretical models to describe phase behavior, combining the Flory-Huggins Edited by Avraam I. Isayev

show abstract

“…Mixtures in which one of the components is a liquid crystal or a liquid crystalline polymer offer a significant potential for applications and have received increased attention [28,34,20,27,9,8,26].…”

Section: Introductionmentioning

confidence: 99%