Browsing Araştırma Çıktıları | WoS | Scopus | TR-Dizin | PubMed by Author "Pekcan, Önder"
Now showing items 21-40 of 100
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Effect of multiwalled carbon nanotube (MWNT) on the behavior of swelling of polyacrylamide-MWNT composites
Evingür, Gülşen Akin; Pekcan, Önder (Sage Publications Ltd, 2014)The purpose of this paper is to discuss the role of multiwalled carbon nanotube in the swelling of polyacrylamide-multiwalled carbon nanotube composites. Swelling experiments were performed in water at various temperatures ... -
The Effect Of Surfaces On The Orientational Properties and Phase Transitions Peculiarities Of A Nonpolar Smectogen
Yıldız, Sevtap; Zayim, Esra Ozkan; Pekcan, Önder; Özbek, Haluk (World Scientific Publ Co Pte Ltd, 2010)The effect of thin films on the orientational and optical properties of nonpolar monolayer smectogen 4-butoxyphenyl-4'-decyloxybenzoate ((10) over barO (4) over bar) liquid crystal has been studied by polarizing microscopy ... -
Effect of temperature and graphene oxide on the swelling of PAAm-GO composite gels
Osma, Büşra; Akın Evingür, Gülşen; Pekcan, Önder (Avestia Publishing, 2019)Graphene oxide (GO) is a two dimensional carbon material with similar one-atom thickness, and is a light material having extremely high strength and thermal stability [1]. Thus, GO is an efficient filler for the enhancement ... -
Effects of GNP addition on optical properties and band gap energies of PMMA films
Mergen, Ömer Bahadır; Arda, Ertan; Kara, Selim; Pekcan, Önder (Wiley, 2019)In this study the effects of graphene nanoplatelet (GNP) doping on the optical parameters (absorption coefficient alpha and extinction coefficient k) and the optical transition energies (optical band gap and Urbach energies) ... -
Elastic percolation of swollen polyacrylamide (PAAm)-multiwall carbon nanotubes composite
Evingür, Gülşen Akin; Pekcan, Önder (Taylor & Francis Ltd, 2012)Polyacrylamide (PAAm)-multiwalled carbon nanotube (MWNT) composites were prepared via free radical cross-linking copolymerization with different amounts of MWNTs varying in the range between 0.1 and 50 wt%. The mechanical ... -
Elastic Properties of a Swollen PAAm-NIPA Copolymer with Various NIPA Contents
Evingür, Gülşen Akin; Pekcan, Önder (Taylor & Francis, 2014)Copolymer based on cross-linked polyacrylamide (PAAm) having N-isopropylacrylamide (NIPA) was prepared and their elastic properties were studied as a function of NIPA contents. NIPA content dependency of the shear modulus ... -
Elasticity Study of PAAm-kappa C Composite Prepared in Various kappa C Content and Measured at Several Temperatures
Evingür, Gülşen Akin; Pekcan, Önder (Polish Acad Sciences Inst Physics, 2015)Polyacrylamide (PAAm)-kappa carrageenan (kappa C) composite gels were prepared via free radical crosslinking copolymerization with various (w/v) percentages of kappa C in the range between 0.5 and 3 (w/v)% of kappa C . ... -
Electrical and optical percolations in PMMA/GNP composite films
Arda, Ertan; Mergen, Omer Bahadir; Pekcan, Önder (Taylor & Francis Ltd, 2018)Effects of graphene nanoplatelet (GNP) addition on the electrical conductivity and optical absorbance of poly(methyl methacrylate)/graphene nanoplatelet (PMMA/GNP) composite films were studied. Optical absorbance and two ... -
Electrical and optical percolations of polystyrene latex-multiwalled carbon nanotube composites
Kara, Selim; Arda, Ertan; Dolastir, Fahrettin; Pekcan, Önder (Academic Press Inc Elsevier Science, 2010)Electrical conductivity and optical transmittance properties of polystyrene (PS)-multiwalled carbon nanotube (MWCNT) composite films were investigated. Composite films were prepared by mixing of various mass fractions of ... -
Electrical optical and fluorescence percolations in P(VAc-co-BuA)/MWCNT composite films
Arda, Ertan; Kara, Selim; Pekcan, Önder (Taylor & Francis Ltd, 2013)Effects of multiwall carbon nanotube (MWCNT) addition on the electrical conductivities optical transparencies and fluorescence emissions of poly(vinyl acetate-co-butyl acrylate) (P(VAc-co-BuA))/MWCNT composite films were ... -
Energy needs for drying of PAAm- kappa C composites prepared with various kappa C contents
Pekcan, Önder; Evingür, Gülşen Akın (European Polymer Federation, 2011)Various polyacrylamide (PAAm) - Kappa Carrageenan (kappa C) composite gels were prepared from acrylamide (AAm) N N'- methylenebisacrylamide (BIS) and different kappa C contents by free radical crosslinking copolymerization ... -
Epidemic models for phase transitions: application to a physical gel
Bilge, Ayşe Hümeyra; Pekcan, Önder; Kara, Selim; Öğrenci, Arif Selçuk (Taylor & Francis Ltd, 2017)Carrageenan gels are characterized by reversible sol-gel and gel-sol transitions under cooling and heating processes and these transitions are approximated by generalized logistic growth curves. We express the transitions ... -
Evaluation of the fractal dimension of polyacrylamide during gelation and swelling
Arda, Ertan; Kara, Selim; Pekcan, Önder; Gülşen, Akın-Evingür (Elsevier, 2021)[Abstract Not Available] -
Film Formation of Nano-Sized Hard Latex (PS) in Soft Polymer Matrix (PBA): An Excimer Study
Uğur, Şaziye; Sunay, Selin; Pekcan, Önder (John Wiley & Sons Inc, 2010)This work reports steady state fluorescence (SSF) technique for studying film formation from pyrene (P)labeled nano-sized polystyrene (PS) and poly(n-butyl acrylate) (PBA) hard/soft latex blends. Blend films were prepared ... -
Film Formation of Poly (methyl methacrylate) Latex With Pyrene Functional Poly (divinylbenzene) Microspheres Prepared by Click Chemistry
Uğur, Şaziye; Yargı, Önder; Durmaz, Yasemin Yuksel; Karagöz, Bünyamin; Bıçak, Niyazi; Yağci, Yusuf; Pekcan, Önder (Wiley-Blackwell, 2011)This work reports on the application of steady state fluorescence (SSF) technique for studying film formation from poly(methyl methacrylate) (PMMA) latex and poly(divinylbenzene) (PDVB) microsphere composites. Pyrene (P) ... -
Fluorescence and photon transmission techniques for studying film formation from PS/GO nanocomposites
M. Selin, Sunay; Şaziye, Uğur; Pekcan, Önder (SPRINGER, 2020)Steady-state fluorescence and UV-Vis techniques were used to study the film formation behavior of composites consisting of pyrene (P)-labeled polystyrene (PS) latex and graphene oxide (GO) in terms of PS latex/GO volume ... -
Fluorescence quenching method for monitoring oxygen diffusion into PS/CNT composite films
Yargı, Önder; Uğur, Şaziye; Pekcan, Önder (Elsevier Science SA, 2013)Oxygen permeabilities of nanocomposite films consisting of multi wall carbon nanotubes (MWNT) and polystyrene (PS) were determined to investigate the oxygen diffusion depending on MWNT and temperature. A method which is ... -
Fluorescence study of effect of particle size in PS latex/Al2O3 nanocomposite films
Uğur, Şaziye; Sunay, M. Selin; Pekcan, Önder (MANEY PUBLISHING, 2015)Steady state fluorescence and BioUV-Visible techniques were used to study film formation of polystyrene (PS) latex and Al2O3 composites depending on PS particles size and Al2O3 content. Two film series (SmPS/Al2O3 and ... -
Fluorescence Study of Film Formation from PS Latex-TiO2 Composites: Effects of TiO2 Content Film Thickness and Particle Size
Ugur, Saziye; Sunay, M. Selin; Pekcan, Önder (Amer Scientific Publishers, 2015)Steady-state fluorescence (SSF) technique in conjunction with UV-visible (UVV) technique atomic force microscope (AFM) and scanning electron microscope (SEM) is used for studying film formation from TiO2 covered polystyrene ... -
Fluorescence study of film formation from PS/Al2O3 nanocomposites
Pekcan, Önder; Uğur, Şaziye; Sunay, M. Selin (Elsevier Science, 2014)Steady state fluorescence (SSF) and UV-vis (UVV) techniques were used to study the film formation behavior of pyrene (P) labeled polystyrene (PS) latex and Al2O3 (PS/Al2O3) composites depending on PS particles size and ...