TY - JOUR AU - Verebélyi, Klára AU - Szabó, Ákos AU - Réti, Zsombor AU - Szarka, Györgyi Éva AU - Villányi, Ákos AU - Iván, Béla TI - Highly Efficient Cationic Polymerization of β-Pinene, a Bio-Based, Renewable Olefin, with TiCl4 Catalyst from Cryogenic to Energy-Saving Room Temperature Conditions JF - INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES J2 - INT J MOL SCI VL - 24 PY - 2023 IS - 6 PG - 17 SN - 1661-6596 DO - 10.3390/ijms24065170 UR - https://m2.mtmt.hu/api/publication/33687683 ID - 33687683 N1 - Export Date: 3 May 2023 Correspondence Address: Verebélyi, K.; Polymer Chemistry and Physics Research Group, Magyar Tudósok Krt 2, Hungary; email: verebelyi.klara@ttk.hu Correspondence Address: Iván, B.; Polymer Chemistry and Physics Research Group, Magyar Tudósok Krt 2, Hungary; email: ivan.bela@ttk.hu AB - Polymers based on renewable monomers are projected to have a significant role in the sustainable economy, even in the near future. Undoubtedly, the cationically polymerizable β-pinene, available in considerable quantities, is one of the most promising bio-based monomers for such purposes. In the course of our systematic investigations related to the catalytic activity of TiCl4 on the cationic polymerization of this natural olefin, it was found that the 2-chloro-2,4,4-trimethylpentane (TMPCl)/TiCl4/N,N,N′,N′-tetramethylethylenediamine (TMEDA) initiating system induced efficient polymerization in dichloromethane (DCM)/hexane (Hx) mixture at both −78 °C and room temperature. At −78 °C, 100% monomer conversion was observed within 40 min, resulting in poly(β-pinene) with relatively high Mn (5500 g/mol). The molecular weight distributions (MWD) were uniformly shifted towards higher molecular weights (MW) in these polymerizations as long as monomer was present in the reaction mixture. However, chain–chain coupling took place after reaching 100% conversion, i.e., under monomer-starved conditions, resulting in considerable molecular weight increase and MWD broadening at −78 °C. At room temperature, the polymerization rate was lower, but chain coupling did not occur. The addition of a second feed of monomer in the polymerization system led to increasing conversion and polymers with higher MWs at both temperatures. 1H NMR spectra of the formed polymers indicated high in-chain double-bond contents. To overcome the polarity decrease by raising the temperature, polymerizations were also carried out in pure DCM at room temperature and at −20 °C. In both cases, rapid polymerization occurred with nearly quantitative yields, leading to poly(β-pinene)s with Mns in the range of 2000 g/mol. Strikingly, polymerization by TiCl4 alone, i.e., without any additive, also occurred with near complete conversion at room temperature within a few minutes, attributed to initiation by adventitious protic impurities. These results convincingly prove that highly efficient carbocationic polymerization of the renewable β-pinene can be accomplished with TiCl4 as catalyst under both cryogenic conditions, applied widely for carbocationic polymerizations, and the environmentally benign, energy-saving room temperature, i.e., without any additive and cooling or heating. These findings enable TiCl4-catalyzed eco-friendly manufacturing of poly(β-pinene)s, which can be utilized in various applications, and in addition, subsequent derivatizations could result in a range of high-added-value products. LA - English DB - MTMT ER - TY - JOUR AU - Ovc-Okene , Derek AU - Angamuthu, Gnanavel AU - Szabó, Ákos AU - Szarka, Györgyi Éva AU - Iván, Béla AU - Kun, Róbert TI - Investigation of poly(3,6-dioxa-1,8-octane-dithiol)-based organosulfur polymer as the positive electrode material in rechargeable Li-S battery JF - JOURNAL OF ELECTROANALYTICAL CHEMISTRY J2 - J ELECTROANAL CHEM VL - 929 PY - 2023 PG - 8 SN - 1572-6657 DO - 10.1016/j.jelechem.2022.117113 UR - https://m2.mtmt.hu/api/publication/33674915 ID - 33674915 LA - English DB - MTMT ER - TY - PAT AU - Iván, Béla AU - Kasza, György AU - Lontay, Dávid Zoltán AU - Balázs, Menyhért AU - Katalin, Neuróhr AU - Sármezey, Bence András AU - Szabó, Ákos AU - Szarka, Györgyi Éva AU - Dénes, Száz AU - Péter, Bánhegyi AU - Péter, Kerényi AU - László, Puskás TI - Indicator Material Comprising a Polymeric gel carrier and polymeric indicator PY - 2022 PG - 21 UR - https://m2.mtmt.hu/api/publication/33575674 ID - 33575674 LA - English DB - MTMT ER - TY - JOUR AU - Szabó, Ákos AU - Szarka, Györgyi Éva AU - Trif, László AU - Gyarmati, Benjámin Sándor AU - Nagyné Bereczki, Laura AU - Iván, Béla AU - Kovács, Ervin TI - Poly(dithiophosphate)s, A New Class of Phosphorus- and Sulfur-Containing Functional Polymers by a Catalyst-Free Facile Reaction between Diols and Phosphorus Pentasulfide JF - INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES J2 - INT J MOL SCI VL - 23 PY - 2022 IS - 24 PG - 13 SN - 1661-6596 DO - 10.3390/ijms232415963 UR - https://m2.mtmt.hu/api/publication/33339949 ID - 33339949 N1 - Polymer Chemistry and Physics Research Group, Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar tudósok krt. 2, Budapest, H-1117, Hungary Functional Nanoparticles Research Group, Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar tudósok krt. 2, Budapest, H-1117, Hungary Soft Matters Group, Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Műegyetem rkp. 3, Budapest, H-1111, Hungary Plasma Chemistry Research Group, Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar tudósok krt. 2, Budapest, H-1117, Hungary Chemical Crystallography Research Laboratory, Research Centre for Natural Sciences, Magyar tudósok krt. 2, Budapest, H-1117, Hungary Export Date: 5 April 2023 Correspondence Address: Szabó, A.; Polymer Chemistry and Physics Research Group, Magyar tudósok krt. 2, Hungary; email: szabo.akos@ttk.hu Correspondence Address: Iván, B.; Polymer Chemistry and Physics Research Group, Magyar tudósok krt. 2, Hungary; email: ivan.bela@ttk.hu AB - Novel poly(dithiophosphate)s (PDTPs) were successfully synthesized under mild conditions without any additive in the presence of THF or toluene diluents at 60 °C by a direct, catalyst-free reaction between the abundant phosphorus pentasulfide (P4S10) and glycols such as ethylene glycol (EG), 1,6-hexanediol (HD) and poly(ethylene glycol) (PEG). GPC, FTIR, 1H and 31P NMR analyses proved the formation of macromolecules with dithiophosphate coupling groups having P=S and P-SH pendant functionalities. Surprisingly, the ring-opening of THF by the P-SH group and its pendant incorporation as a branching point occur during polymerization. This process is absent with toluene, providing conditions to obtain linear chains. 31P NMR measurements indicate long-time partial hydrolysis and esterification, resulting in the formation of a thiophosphoric acid moiety and branching points. Copolymerization, i.e., using mixtures of EG or HD with PEG, results in polymers with broadly varying viscoelastic properties. TGA shows the lower thermal stability of PDTPs than that of PEG due to the relatively low thermal stability of the P-O-C moieties. The low Tgs of these polymers, from −4 to −50 °C, and a lack of PEG crystallites were found by DSC. This polymerization process and the resulting novel PDTPs enable various new routes for polymer synthesis and application possibilities. LA - English DB - MTMT ER - TY - JOUR AU - Ábrahám, Ágnes AU - Gyulai, Gergő AU - Tóth, Tünde AU - Szvoboda, Barna AU - Mihály, Judith AU - Szabó, Ákos AU - Kiss, Éva TI - Improvement of the drug encapsulation into biodegradable polyester nanocarriers by blending of poly(lactic-co-glycolic acid) and polycaprolactone JF - EXPRESS POLYMER LETTERS J2 - EXPRESS POLYM LETT VL - 16 PY - 2022 IS - 9 SP - 960 EP - 977 PG - 18 SN - 1788-618X DO - 10.3144/expresspolymlett.2022.70 UR - https://m2.mtmt.hu/api/publication/32920041 ID - 32920041 N1 - Laboratory of Interfaces and Nanostructures, Institute of Chemistry, Eötvös Loránd University, 112 PO Box 32, Budapest, H-1518, Hungary MTA-ELTE Lendület ‘Momentum’ Peptide-based Vaccines Research Group, Eötvös Loránd University, Pázmány Péter sétány 1/a, Budapest, H-1117, Hungary Biological Nanochemistry Research Group, Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2, Budapest, H-1117, Hungary Polymer Chemistry Research Group, Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2, Budapest, H-1117, Hungary Cited By :1 Export Date: 27 October 2023 Correspondence Address: Ábrahám, Á.; Laboratory of Interfaces and Nanostructures, 112 PO Box 32, Hungary; email: abraham.agnes@ttk.elte.hu LA - English DB - MTMT ER - TY - CHAP AU - Iván, Béla AU - Fodor, Csaba AU - Stumphauser, Tímea AU - Kasza, György AU - Haraszti, Márton AU - Kali, Gergely AU - Mezey, Péter AU - Pásztor, Szabolcs AU - Szabó, Ákos AU - Domján, Attila AU - Thomann, Ralf AU - Thomann, Yi AU - Mülhaupt, Rolf TI - Bicontinuous nanophasic amphiphilic polymer conetworks with broad composition range: A novel nanostructured material platform T2 - Polymer meeting 14 - book of abstract SN - 9783851258448 PY - 2021 SP - IL-9 UR - https://m2.mtmt.hu/api/publication/32493345 ID - 32493345 LA - English DB - MTMT ER - TY - CHAP AU - Iván, Béla AU - Szanka, István AU - Szabó, Ákos AU - Pásztor, Szabolcs AU - Pásztói, Balázs AU - Stumphauser, Tímea AU - Kasza, György AU - Szarka, Györgyi Éva AU - Kalocsai, Dániel AU - Bajcsi, Áron AU - Fecske, Dóra AU - Kovács, Ervin AU - Osváth, Zsófia AU - Petróczy, Anna AU - Verebélyi, Klára TI - Endfunctional Polyisobutylenes By Quasiliving Carbocationic Polymerization and Bi- and Multicomponent Macromolecular Architectures Therefrom T2 - Macromolecular Engineering: Design, Synthesis, and Application of Polymers PB - Elsevier CY - Amsterdam CY - Oxford CY - Cambridge, Massachusetts SN - 9780128219980 PY - 2021 SP - 23 EP - 49 PG - 27 SN - 9780128219980 DO - 10.1016/B978-0-12-821998-0.00002-8 UR - https://m2.mtmt.hu/api/publication/31859513 ID - 31859513 LA - English DB - MTMT ER - TY - JOUR AU - Pásztói, Balázs AU - Trötschler, Tobias M. AU - Szabó, Ákos AU - Kerscher, Benjamin AU - Tenhu, Heikki AU - Mülhaupt, Rolf AU - Iván, Béla TI - Quasiliving cationic ring-opening polymerization of 2-ethyl-2-oxazoline in benzotrifluoride, as an alternative reaction medium JF - POLYMER J2 - POLYMER VL - 212 PY - 2021 PG - 6 SN - 0032-3861 DO - 10.1016/j.polymer.2020.123165 UR - https://m2.mtmt.hu/api/publication/31637510 ID - 31637510 LA - English DB - MTMT ER - TY - PAT AU - Iván, Béla AU - Kasza, György AU - Lontay, Dávid Zoltán AU - Menyhért, Balázs AU - Neuróhr, Katalin AU - Sármezey, Bence András AU - Szabó, Ákos AU - Szarka, Györgyi Éva AU - Száz, Dénes AU - Bánhegyi, Péter AU - Kerényi, Pétert AU - Puskás, László TI - INDICATOR MATERIAL COMPRISING A POLYMERIC GEL CARRIER AND POLYMERIC INDICATOR PY - 2020 UR - https://m2.mtmt.hu/api/publication/31795008 ID - 31795008 LA - English DB - MTMT ER - TY - JOUR AU - Pásztói, Balázs AU - Trötschler, Tobias M. AU - Szabó, Ákos AU - Szarka, Györgyi Éva AU - Kerscher, Benjamin AU - Mülhaupt, Rolf AU - Iván, Béla TI - Synthesis of Tosyl- and Nosyl-Ended Polyisobutylenes with High Extent of Functionalities: The Effect of Reaction Conditions JF - POLYMERS J2 - POLYMERS-BASEL VL - 12 PY - 2020 IS - 11 SN - 2073-4360 DO - 10.3390/polym12112504 UR - https://m2.mtmt.hu/api/publication/31643277 ID - 31643277 LA - English DB - MTMT ER -