Control of optical anisotropy at large deformations in PMMA/chlorinated-PHB (PHB-Cl) blends: Mechano-optical behavior

Yalcin, Baris; Çakmak, Mükerrem; Arkin, Ali Hakan; Hazer, Baki; Erman, Burak

doi:10.1016/j.polymer.2006.09.051

Cited by 21 publications

(7 citation statements)

References 47 publications

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“…This paper represents our continuing efforts to understand the mechano optical behavior of different classes of polymers including semirigid polymers with slow crystallization character such as PET, 1 PEN, 2 PEN/PEI blends 3 PENnanocomposites, 7 PMMA/PB-Cl blends, 8 and flexible fast crystallization polypropylene. 9 PEEK with its excellent mechanical properties, good solvent resistance, and very high temperature resistance is of significant scientific and industrial importance.…”

Section: Introductionmentioning

confidence: 99%

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Stages of Structural Ordering Leading to Stress Induced Crystallization of PEEK Films: A Mechano-Optical Study on Deformation, Relaxation and Retraction

2009

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Influence of rubbery state large uniaxial deformation followed by relaxation and retraction stages on the mechano-optical behavior of cast amorphous poly(ether ether ketone) films was investigated. At early stage of stretching the birefringence remains linearly proportional to stress. In this linear optical regime, the material remains amorphous. Beyond a critical stress level, a deviation from linearity is observed where a small fraction of the material exhibit extreme preferred orientation with substantial translational disorder resembling nematic-like order. The onset of this deviation also coincides with the onset of strain hardening. Stretching beyond this transition leads to stress induced crystallization. Films stretched to deformation levels well below the onset of strain hardening, remain amorphous before and after the relaxation stages. The entropy reduction gained through deformation of the polymer chains is not sufficient to form crystalline order at short time scales. Once the initial deformation increased beyond the onset of strain hardening, a long-range network of connected crystallites establishes itself.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Stages of Structural Ordering Leading to Stress Induced Crystallization of PEEK Films: A Mechano-Optical Study on Deformation, Relaxation and Retraction

2009

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“…This negative birefringence is attributed to two chlorine side groups which render high polarizability in the direction transverse to the chain axis compared to one chlorine group for PMCPhNDI. This phenomenon is similar to PMMA . In case of PMCPhNDI, the polarizability associated with one chlorine group is lower than two chlorine group, and hence their contribution to the measured birefringence is insignificant.…”

Section: Resultsmentioning

confidence: 51%

Syntheses and characterization of functionalized polynorbornene dicarboximides for flexible substrates

Park

Choi

Cho

et al. 2012

Polymers for Advanced Techs

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In this study, we synthesized polynorbornene (PNB) dicarboximides substituted by monochlorophenyl group (PMCPhNDI) and dichlorophenyl group (PDCPhNDI) via ring‐opening polymerization using a ruthenium catalyst and investigated their thermal, mechanical, and optical properties. We also discussed the performance and application of the functionalized PNB dicarboximide films as flexible substrates for organic light‐emitting devices (OLEDs). The polymer films exhibited good optical transparency with an average transmittance of around 97% in the visible light region and good thermal stability with a 5% degradation temperature of >440°C. The polymers were applied for flexible displays, which were coated on indium tin oxide (ITO) thin films using a radio‐frequency planar magnetron sputtering system with changing the deposition substrate temperatures. A flexible OLED that was fabricated on the ITO‐grown polymer substrates exhibited a performance as comparable to the corresponding ITO‐grown glass substrates. Copyright © 2012 John Wiley & Sons, Ltd.

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“…9,10 PMMA is one of the important materials used in a variety of optical devices such as polymer optical fibers, optical films for liquid-crystal displays, optical disks, lenses, and so on because of its exceptional clarity in the visible range. 9,11 Curcumin is an important representative of easily metabolized curcuminoids and biocompatible and biodegradable polyphenolic compounds. Curcumin shows broad therapeutic properties such as antibacterial, antiviral, and antitumor properties.…”

Section: Introductionmentioning

confidence: 99%

Biocidal activity of curcumin and cationic polymer possessing composites

Eren

Baysal

Doğan

2020

Journal of Bioactive and Compatible Polymers

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There is a growing interest in new type of biocidal compounds with antibacterial properties against bacteria. In this study, new antibacterial synthetic materials bearing curcumin and cationic polymers were synthesized. In the synthesis stage, the methacrylate functional cationic monomer was synthesized via the Michael addition route by using 3-acryloxy-2-hydroxypropyl methacrylate and 3-amino pyridine to obtain Monomer 1. Monomer 1 was further quaternized with hexyl bromide to obtain a cationic methacrylate functional monomer. Free-radical polymerization of Monomer 1 and methyl acrylate was conducted in the presence of azobisisobutyronitrile under dimethylformamide solvent. The composite formulation was conducted by using turmeric extract Curcuma longa (curcumin), hydroxyapatite, montmorillonite, and silver nitrate. The materials were analyzed by using the methods of X-ray diffraction, nuclear magnetic resonance, Fourier transform infrared spectroscopy, and scanning electron microscopy. The biocidal activities against the bacteria Escherichia coli, Listeria monocytogenes, Salmonella, and Staphylococcus aureus were analyzed using agar well diffusion method. From the Fourier transform infrared, X-ray diffraction, and scanning electron microscopy analysis results of the synthesized nanocomposites, it is seen that they form strong connections with the components added to the composites and form an exfoliated structure. According to the antibacterial analysis results, the nanocomposites obtained have showed a strong antibacterial resistance against E.coli, L.monocytogenes, Salmonella, and S. aureus bacteria, and the high inhibition zone areas were obtained.

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Control of optical anisotropy at large deformations in PMMA/chlorinated-PHB (PHB-Cl) blends: Mechano-optical behavior

Cited by 21 publications

References 47 publications

Stages of Structural Ordering Leading to Stress Induced Crystallization of PEEK Films: A Mechano-Optical Study on Deformation, Relaxation and Retraction

Stages of Structural Ordering Leading to Stress Induced Crystallization of PEEK Films: A Mechano-Optical Study on Deformation, Relaxation and Retraction

Syntheses and characterization of functionalized polynorbornene dicarboximides for flexible substrates

Biocidal activity of curcumin and cationic polymer possessing composites

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