Proton pathways via free volumes: A positron annihilation lifetime spectroscopy (PALS) investigation of proton conductivity in SPEEK-PEG-TMOS composites

M Yılmazoğlu, U Abaci, H Okkay, AY Yahsi… - Colloids and Surfaces A …, 2024 - Elsevier
This study investigates the ionic conductivity and dielectric properties of SPEEK-PEG-TMOS
solid-state polymer electrolytes across a broad frequency spectrum (0.1–1000 kHz). Proton …

Free-volume analysis of the structural and dielectric properties of PMMA/TeO2 composites via positron annihilation lifetime spectroscopy

S Kuzeci, E Ozcan, AU Kaya, R Bakar, C Tav… - Journal of Alloys and …, 2024 - Elsevier
PMMA (Poly methyl methacrylate) composites have promising potential for applications in
optics and dielectric energy storage. To investigate the effects of TeO 2 contents in PMMA in …

Interrelationships of pressure‐dependent hole fraction and elongational viscosity in polymer melts

F Sahin-Dinc, U Yahsi… - Advances in Polymer …, 2019 - Wiley Online Library
The elongational flow behavior of polyethylene, polypropylene, polystyrene, poly (methyl
methacrylate), and polycarbonate, temperatures from 70 to 290° C and pressures up to 70 …

Effect of free volume on curcumin release from various polymer-based composite films analyzed using positron annihilation lifetime spectroscopy

JW Rhim, S Kuzeci, S Roy, N Akti, C Tav, U Yahsi - Materials, 2021 - mdpi.com
This work reports the effects of free volume on curcumin release in various polymer-based
composite films. Curcumin-reinforced biocomposite films were fabricated with natural …

Ionic conductivity of PVdF-co-HFP/LiClO4 in terms of free volume defects probed by positron annihilation lifetime spectroscopy

U Yahsi, H Deligöz, C Tav, K Ulutaş… - Radiation Effects and …, 2019 - Taylor & Francis
Polymers based on ionic conducting materials have important interest because of their
potential applications in polymer electrolytes and membranes for fuel cell application. PVdF …

Free volume vacancy behaviour and dynamic viscosity of diesel fuels with additives at elevated temperature and pressure: thermo-occupancy function

F Sahin-Dinc, C Schaschke… - International Journal of …, 2022 - inderscienceonline.com
The reported pressure-volume-temperature (PVT) data of five different diesel fuels at T=
297.95-373.06 K and P= 0.1-457.2 MPa were described by the Simha-Somcynsky (SS) …

Effects of sintering and zirconmullite doping on nanostructural vacancies of bovine hydroxyapatite by positron techniques

LN Akay, C Kalkandelen, N Akti… - Journal of the …, 2023 - Wiley Online Library
In this study, the nanostructural vacancy behavior of bovine derived hydroxyapatite (BHA)
doped with powder zirconmullite (ZM) contents of 5, 7.5, 10 and 12.5 wt.% were presented at …

Investigation of the relation between free volume and physico-mechanical performance in rigid polyurethane foam containing turkey feather fibers: Part 2

U Soykan, M Khaleel, S Cetin… - Journal of Cellular …, 2022 - journals.sagepub.com
Rigid polyurethane foams (RPUFs) were modified with 0–15 wt.% turkey feather fibers
(TFFs) produced from waste turkey feathers. One-shut free rising method was used for the …

[PDF][PDF] Investigation of Dynamic Viscosity of Several Aliphatic and Aromatic Hydrocarbons in Connection with Thermo-Occupancy Function.

F Sahin-Dinc - Acta Physica Polonica: A, 2022 - przyrbwn.icm.edu.pl
Academic and industrial interests in hydrocarbon fluids are still attractive since they are the
base source for many industrial processes. The knowledge of transport properties of …

[PDF][PDF] Dynamic Viscosity of Some Lubricants in Terms of Local Nano-Void Fraction.

F Sahin-Dinc - Acta Physica Polonica: A, 2023 - przyrbwn.icm.edu.pl
There are quick advances in most aspects of industrial applications, from personal care to
food and from marine to aerospace. These applications promoted the interest in finding new …