Behaviour of the miscibility of poly(ethylene oxide)/liquid crystal blends

Rodrigues, J. R. S.; Kaito, Akira; Soldi, Valdir; Pires, Alfredo T. N.

doi:10.1002/(sici)1097-0126(199806)46:2<138::aid-pi977>3.0.co;2-2

Polym. Int.

1998

DOI: 10.1002/(sici)1097-0126(199806)46:2<138::aid-pi977>3.0.co;2-2

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Behaviour of the miscibility of poly(ethylene oxide)/liquid crystal blends

J. R. S. Rodrigues

Akira Kaito

Valdir Soldi

et al.

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Cited by 8 publications

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“…Polysulfone (PSU, UDEL-1700), with a rigid structure, was also taken as a polymer matrix; its glass transition temperature is 182 °C, which makes it a good matrix for the formation of PDLC systems . More friendly biocompatible polymers such as PSU, poly(vinyl alcohol) (PVA), PVB, poly(vinyl formal) (PVFM), poly(methyl methacrylate- co -butyl acrylate) (PMMABA), poly(butylene adipate) (PBA), poly(ethylene oxide) (PEO), semicrystalline polymer poly( l -lactic acid) (PLLA), or chitosan can be the carrying matrix. The molecular weight of the polymer matrix influences the morphology of the LC droplets in PDLC films and the performance of PDLC devices, where higher molecular weight polymer substrates need a stronger reorientation field. − The need for polar solvents causes environmental pollution and complex operation.…”

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confidence: 99%

Advancements and Applications of Liquid Crystal/Polymer Composite Films

Zhou,

Liu,

Miao

et al. 2023

ACS Materials Lett.

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confidence: 99%

Advancements and Applications of Liquid Crystal/Polymer Composite Films

Zhou,

Liu,

Miao

et al. 2023

ACS Materials Lett.

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Phase transition studies of polymer–liquid crystal composite using dielectric and optical transmittance techniques

et al. 2008

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Dielectric properties of polymer–liquid crystal composite comprised of the polymer poly(methyl methacrylate) and low‐molecular mass liquid crystal, cholesteryl palmitate are investigated in the frequency range from 1 kHz to 10 MHz and in the temperature range of 27–120°C. The dielectric permittivity and dielectric loss shows substantial changes with the addition of polymer. The significant feature is that the pure liquid crystal exhibits broad absorption, showing dielectric relaxation in the range of 10 – 100 kHz whereas the composite shows relaxation peaks at 10 MHz. The percentage optical transmittance of pure liquid crystal and composite have also been measured and compared to study its phase transition behavior. The smectic phase observed in the pure liquid crystal is suppressed on formation of polymer composites. The mass spectrometry measurement does not show any abduct formation between the pure liquid crystal and the composite. POLYM. COMPOS., 2008. © 2008 Society of Plastics Engineers

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Polymorphic crystalline structure and diversified crystalline morphology of poly(butylene adipate) blended with low‐molecular‐mass liquid crystals

Zheng

Bao

et al. 2020

Polymer Crystallization

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Due to the multiple phase transition of liquid crystal, the semicrystalline polymer would exhibit the diversified crystalline structure and morphology in its mixture with liquid crystals. Herein, we choose polymorphic poly(butylene adipate) (PBA) as a model semicrystalline polymer, 4-cyano-4 0 -n-pentylbiphenyl (5CB) as a liquid crystalline diluter and studied the crystallization kinetics, polymorphic crystalline structure, crystalline structural transition, and crystalline morphology of PBA/5CB mixtures. The spherulitic growth rate and crystallization rate of PBA decrease after mixing with 5CB, attributing to the dilution effect of liquid crystals. Compared to neat PBA, the formation of thermodynamically stable α crystals is favored in the PBA/5CB blend at the same crystallization temperature (T c ), ascribed to the depression of equilibrium melting temperature of PBA. The heating-induced β-to-α transition of PBA crystals shifts to lower temperature in the PBA/5CB blend compared to the neat PBA. The crystalline morphology of PBA is strongly influenced by the incorporation of 5CB. The long period of PBA crystals enhances with the addition of a small amount of 5CB, due to the interlamellar segregation of 5CB in PBA crystals. The distribution of 5CB changes from the interlamellar to interspherulitic or interfibrillar regions of PBA crystals as the 5CB content increases in the PBA/5CB blend. K E Y W O R D S crystalline morphology, crystalline structure, liquid crystal, poly(butylene adipate)

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Behaviour of the miscibility of poly(ethylene oxide)/liquid crystal blends

Cited by 8 publications

References 1 publication

Advancements and Applications of Liquid Crystal/Polymer Composite Films

Advancements and Applications of Liquid Crystal/Polymer Composite Films

Phase transition studies of polymer–liquid crystal composite using dielectric and optical transmittance techniques

Polymorphic crystalline structure and diversified crystalline morphology of poly(butylene adipate) blended with low‐molecular‐mass liquid crystals

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