Person:
ÇAKMAKÇI, EMRAH

Profile Picture

Email Address

Birth Date

Research Projects

Organizational Units

OrgUnit Logo
Organizational Unit

Job Title

Last Name

ÇAKMAKÇI

First Name

EMRAH

Name

Filters

2011 - 201932020 - 20211
Reset filters

Settings

Has files: false × Subject: BEHAVIOR ×

Search Results

Now showing 1 - 4 of 4
  • No Thumbnail Available
    PublicationMetadata only
    Allyl Phosphonium Salt-Modified Clay for Photocured Coatings: Influence on the Properties of Polyester Acrylate-Based Coatings
    (WILEY, 2015) ÇAKMAKÇI, EMRAH; Zeytuncu, Bihter; Cakmakci, Emrah; Kahraman, Memet Vezir
    In this study, bentonite clay was modified with a phosphonium salt and this modified clay was used to prepare polyester acrylate based coatings to improve their flame retardancy and mechanical properties. Photocured composites were prepared with 1, 2, and 3 wt% phosphonium salt modified clay and for comparison 1 wt% nonmodified clay containing composites were also prepared. Modified clay displayed good dispersion properties due to its increased basal spacing. Composites were characterized by FT-IR and XRD measurements. According to XRD results, it was found that the modified clay was exfoliated in the composites. Furthermore, we investigated the effect of allyl phosphonium salt modified clay on the thermal, mechanical, and flame retardant properties of polyester acrylate based composites coatings. When compared with neat clay containing coatings, modified clay containing photocured coatings exhibited increased modulus and enhanced thermal properties due to increased crosslinking density. Moreover, the presence of the phosphonium salt enhanced the flame retardancy of the polyester based coatings. POLYM. COMPOS., 36:946-954, 2015. (c) 2014 Society of Plastics Engineers
  • No Thumbnail Available
    PublicationMetadata only
    Preparation and Characterization of Thermally Conductive Thermoplastic Polyurethane/h-BN Nanocomposites
    (WILEY, 2014) ÇAKMAKÇI, EMRAH; Cakmakci, Emrah; Kocyigit, Ciler; Cakir, Selma; Durmus, Ali; Kahraman, M. Vezir
  • No Thumbnail Available
    PublicationMetadata only
    All in one: The preparation of polyester/silica hybrid nanocomposites via three different metal-free click reactions
    (PERGAMON-ELSEVIER SCIENCE LTD, 2021) ÇAKMAKÇI, EMRAH; Daglar, Ozgun; Cakmakci, Emrah; Gunay, Ufuk Saim; Hizal, Gurkan; Tunca, Umit; Durmaz, Hakan
    The development of innovative routes for the preparation of hybrid polymer nanocomposites is an active area of research for engineering applications. In this study, we have utilized three different click chemistry reactions; aza-Michael, thiol-Michael, and metal-free azide-alkyne cycloaddition reactions, and prepared hybrid nanocomposites through the reactions between electron-deficient alkyne-containing polyester and modified silica nanoparticles bearing either azide, thiol, or amine groups. The modification of the silica nanoparticles was characterized by Fourier transform infrared spectroscopy and thermogravimetric analysis. The formation of the hybrid nanocomposites was verified by measuring their gel contents. The mechanical, thermal, and optical properties of the hybrid nanocomposites were also determined. The gel content of the prepared hybrid nanocomposites reached almost 88%. Modified silica nanoparticles showed a much uniform dispersion in the polymer matrix when compared to neat silica nanoparticles. A dramatic increase both in modulus and T-g values was observed for the hybrid nanocomposites.
  • No Thumbnail Available
    PublicationMetadata only
    Flame retardant thiol-ene photocured coatings
    (ELSEVIER, 2011) ÇAKMAKÇI, EMRAH; Cakmakci, Emrah; Mulazim, Yusuf; Kahraman, Memet Vezir; Apohan, Nilhan Kayaman
    The low polymerization tendency of allyl compounds can be enhanced by thiol-ene polymerization systems. In this study. allyldiphenyl phosphine oxide (ADPPO) containing thiol-ene based photocured coatings were prepared with the aim to improve their final thermal and flame retardant properties. The photopolymerization kinetics of thiol-ene based formulations were investigated by real-time infrared spectroscopy. The incorporation of ADPPO into the polymer chains was confirmed by monitoring the conversion of acrylate double bonds and measuring the gel content of the crosslinked films. The experiments showed that as the amount of ADPPO was increased, thermal and flame retardant properties of the coatings were also increased. (C) 2010 Elsevier Ltd. All rights reserved.