Article
Chemistry, Multidisciplinary
Pei-Jin Lin, Cheng-Hung Liao, Shih-Chieh Yeh, Yu-Cheng Tseng, Feng-Cheng Chang, Wen-Chang Chen, Ru-Jong Jeng, Nae-Lih Wu, Chu-Chen Chueh
Summary: Solid polymer electrolytes with embedded oxidized cellulose nanofibers were developed using an environmentally friendly manufacturing process. These biocompatible electrolytes have great potential for increasing the sustainable economic value of lithium-ion batteries.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Materials Science, Paper & Wood
Yuan Zhong, Xueyi Gao, Wanqi Zhang, Xue Wang, Kebing Wang
Summary: In this study, cellulose nanocrystals were prepared from Salix psammophila and carboxyl functional groups were introduced by oxidation. Microscopy observation revealed that the nanocrystals exhibited short rod-like fibers. XPS analysis confirmed the presence of carboxyl groups in the nanocrystals.
Article
Multidisciplinary Sciences
Rubina Troiano, Mario Carratu, Stefania Pragliola, Antonella Caterina Boccia, Fabia Grisi
Summary: This article presents data related to the synthesis of fluorescent polymers using norbornene and oxanorbornene derivatives through ROMP. The compounds were characterized using NMR, UV-Visible spectroscopy, and fluorescence spectroscopy. The characterization data provide useful information for the design of new monomers with fluorescent carbazole and coumarin groups.
Article
Polymer Science
Bercis Pektas, Gokhan Sagdic, Ozgun Daglar, Serter Luleburgaz, Ufuk Saim Gunay, Gurkan Hizal, Umit Tunca, Hakan Durmaz
Summary: In this study, a polythioether with double clickable alkyne groups was prepared using a rapid polymerization method and combined with CuAAC click reaction to construct new topological polymers. The synthesis and post-polymerization modification processes were shown to be rapid and efficient.
Article
Chemistry, Multidisciplinary
Karen Cangul, Emrah Cakmakci, Ozgun Daglar, Ufuk Saim Gunay, Gurkan Hizal, Umit Tunca, Hakan Durmaz
Summary: Pressure from environmental NGOs and the public is driving research on innovative and renewable polymers and additives. A recent focus has been on bio-based green plasticizers that can be covalently attached to replace toxic phthalate-based plasticizers. In this study, azide-functionalized soybean oil derivative (AzSBO) was prepared and investigated as a plasticizer. The results showed that AzSBO improved the thermal, mechanical, and solvent absorption properties of the polymer.
Article
Polymer Science
Cagatay Altinkok, Gokhan Sagdic, Ozgun Daglar, Merve Ercan Ayra, Yasemin Yuksel Durmaz, Hakan Durmaz, Gokhan Acik
Summary: Phosphorylated poly(vinyl chloride) (PPVC)/polyethyleneimine (PEI) nanofibers were successfully prepared via electrospinning using their blended solutions. The modification of PVC into alcohol-soluble PPVC was achieved through a metal-free azide-alkyne 1,3-dipolar cycloaddition reaction. The PPVC-PEI nanofibers exhibited a safer surface for platelets with lower hemolytic activity compared to PPVC nanofibers, showing great potential in various biomedical applications.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Busra Celik, Dilhan Kandemir, Serter Luleburgaz, Emrah Cakmakci, Ufuk Saim Gunay, Volkan Kumbaraci, Hakan Durmaz
Summary: A versatile and novel bio-based platform was developed by reacting castor oil with propiolic acid for performing amino-yne click reactions. The platform enabled easy and catalyst-free click reactions at room temperature within 5 minutes. Thermosets prepared using the platform showed improved thermal and mechanical properties.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Polymer Science
Erhan Demirel, Yasemin Yuksel Durmaz
Summary: Combination therapy involving anticancer drugs and gene therapy agents has been proven effective in treating different types of cancer. In this study, a modified strategy was developed to enhance the use of reduced graphene oxide (rGO) as a carrier for delivering drugs and nucleotides. The newly designed copolymer allowed for the conjugation of a targeting peptide and the loading of hydrophobic drugs, resulting in a multifunctional nanoplatform with controlled drug release and high transfection efficiency. The experiments demonstrated the potential of this nanoplatform in selectively delivering different cargoes to tumor sites.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Engineering, Environmental
Ozge Ozukanar, Emrah Cakmakci, Gokhan Sagdic, Ufuk Saim Gunay, Hakan Durmaz, Volkan Kumbaraci
Summary: In this study, a novel bio-based reactive phosphorus-containing monomer, eugenol-DOPO, was synthesized via a one-step reaction. The thermal and thermomechanical properties of the resulting thermosets were improved by increasing the percentage of eugenol-DOPO in the formulations. The presence of N and P played a synergistic effect and enhanced the limiting oxygen index (LOI) values for the thermoset materials. Eugenol-DOPO is believed to be a good alternative monomer for thermally stable photocurable thermosets and a suitable bio-based additive for other polymers as well.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Review
Polymer Science
Serter Luleburgaz, Umit Tunca, Hakan Durmaz
Summary: The reductive etherification reaction (RER) using silane as a reducing agent and Bronsted or Lewis acid enables the synthesis of symmetrical and unsymmetrical ethers from carbonyl groups. This strategy was first applied at the macromolecular level in 1993, resulting in the self-polymerization of isophthalaldehyde to produce polyethers. The synthesis of polyethers with alternating structures was then achieved by reacting isophthalaldehyde with bis(trimethylsilyl) ethers or diols as comonomers using silane and Lewis acid. Additionally, recent studies have shown that polyether synthesis and post-polymerization modification can be effectively carried out using chlorodimethylsilane as both a reducing agent and a Lewis acid.
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2023)
Article
Polymer Science
Emre Akar, Serter Luleburgaz, Ufuk Saim Gunay, Volkan Kumbaraci, Umit Tunca, Hakan Durmaz
Summary: This study demonstrates the feasibility of using amino-yne reactions for polymer-polymer conjugation and post-polymerization modification of amine-functional polymers. The reactions proceed efficiently under mild conditions without the need for catalysts or additives.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Polymer Science
Ozge Ozukanar, Emrah Cakmakci, Ozgun Daglar, Hakan Durmaz, Volkan Kumbaraci
Summary: The study investigated the use of eugenol as a bio-based building block for the preparation of thermoset materials. By combining thiol-ene photopolymerization and thermal azide-alkyne cycloaddition click reactions, eugenol-based coatings with P-, N-, and Si-containing networks were successfully synthesized. These coatings showed excellent thermal stability, optical transparency, pendulum hardness, solvent resistance, and adhesion performance. They also exhibited high gel content and char yield, and resistance to acidic and basic conditions as well as solvents.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Polymer Science
Gokhan Sagdic, Ozgun Daglar, Emrah Cakmakci, Volkan Findik, Safiye Sag Erdem, Umit Tunca, Ufuk Saim Gunay, Hakan Durmaz
Summary: A novel organocatalyst-mediated phospha-Michael reaction (OCPMR) was developed for the addition of phosphorus nucleophiles to electron-deficient alkynes. The reaction allowed for fast double-addition of phosphorous compounds to triple bonds of alkynes, with aromatic phosphorous species reacting within 5 minutes at room temperature. The method was used to synthesize double-phosphorylated allyl-functional monomers and thermoset materials, as well as to functionalize electron-deficient triple bonds with P-H bond-bearing compounds, offering a straightforward approach for phosphorus-containing monomer synthesis and polymer post-functionalization.
Article
Chemistry, Multidisciplinary
Sezer Ozenler, Ali Ata Alkan, Ufuk Saim Gunay, Ozgun Daglar, Hakan Durmaz, Umit Hakan Yildiz
Summary: The study presents a simple and reliable method for forming nanometer-thickness precision gradients in polymer coatings. The thickness gradients are achieved by reactive layer-by-layer assembly of polyester and polyethylenimine on gold substrates. The characterization of the anisotropic surface obtained under the best conditions is presented, revealing excellent thickness control and mechanical stability of the coating, as well as desirable optical properties.
Review
Polymer Science
Serter Luleburgaz, Umit Tunca, Hakan Durmaz
Summary: Transition metals and metal halides have been efficiently used as catalysts for the hydrosilylation of carbonyl compounds to synthesize silyl ethers. The use of dicarbonyls or hydroxy ketones with dihydrosilanes has led to the production of poly(silyl ether)s (PSE)s. Inexpensive and metal-free catalysts have gained interest in the synthetic approach for PSEs. Furthermore, metal-free catalysts have found practical applications in polymer chemistry.
