TY - JOUR AU - Zelenainé Kohári, Andrea AU - Bárány, Tamás TI - The growth and recyclability of thermoplastic polyurethanes JF - EXPRESS POLYMER LETTERS J2 - EXPRESS POLYM LETT VL - 18 PY - 2024 IS - 5 SP - 459 EP - 460 PG - 2 SN - 1788-618X DO - 10.3144/expresspolymlett.2024.33 UR - https://m2.mtmt.hu/api/publication/34751433 ID - 34751433 N1 - Export Date: 22 March 2024 Correspondence Address: Bárány, T.; Department of Polymer Engineering, Műegyetem rkp. 3, Hungary; email: barany.tamas@gpk.bme.hu LA - English DB - MTMT ER - TY - JOUR AU - Vámos, Csenge AU - Bárány, Tamás AU - Marosfoi, Botond Bela TI - Porous polypropylene produced by phase separation for high solar reflectivity and passive cooling JF - JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY J2 - J THERM ANAL CALORIM VL - Előzetes kiadás / Early view PY - 2024 PG - 13 SN - 1388-6150 DO - 10.1007/s10973-024-12891-5 UR - https://m2.mtmt.hu/api/publication/34727226 ID - 34727226 N1 - Funding Agency and Grant Number: Ministry of Culture and Innovation of Hungary Funding text: No Statement Available AB - Passive cooling techniques have gained widespread use in everyday life and various industries by utilizing sunlight reflection to cool objects without requiring additional energy input. Porous polymer materials possess the unique ability to provide both thermal insulation and solar reflection due to their inherent multiphase structure. In this study, we developed a porous polypropylene (PP) with a hierarchically structured surface layer using a simple and efficient solvent treatment method based on recrystallization. As a result, the porous structure and hierarchically structured surface significantly increase the solar reflectance from 11 to 86%. We found that by manipulating the recrystallization process and using reflective additives, solar reflectivity can be further improved. With the use of TiO2 and BaSO4 additives, a solar reflectance of 90% was achieved, while a solar reflectance of 93% was achieved with nucleating agents. In practical terms, these improvements result in significant temperature reductions in cooling performance tests compared to extruded PP sheets: 17, 19, and 22 degrees C for porous PP, porous PP/TiO2 or PP/BaSO4, and porous nucleated PP, respectively. The modification method introduced could help PP offer new possibilities for developing low-cost chemically resistant and thermally insulating layers in thermal management applications. LA - English DB - MTMT ER - TY - JOUR AU - Görbe, Ákos AU - Zelenainé Kohári, Andrea AU - Bárány, Tamás TI - Rubber Compounds from Devulcanized Ground Tire Rubber: Recipe Formulation and Characterization JF - POLYMERS J2 - POLYMERS-BASEL VL - 16 PY - 2024 IS - 4 PG - 19 SN - 2073-4360 DO - 10.3390/polym16040455 UR - https://m2.mtmt.hu/api/publication/34567543 ID - 34567543 N1 - Export Date: 4 March 2024 Correspondence Address: Bárány, T.; Department of Polymer Engineering, Műegyetem rkp. 3., Hungary; email: barany.tamas@gpk.bme.hu Funding details: Nemzeti Kutatási Fejlesztési és Innovációs Hivatal, NKFI, 2021-1.1.4-GYORSÍTÓSÁV-2022-00030, K128268 Funding text 1: This research was funded by the National Research, Development and Innovation Office, Hungary (K128268 and 2021-1.1.4-GYORSÍTÓSÁV-2022-00030). AB - In this study, our focus was on developing and investigating rubber recipes that are suitable for devulcanized ground tire rubber (dGTR). Devulcanized rubber has a powdery or sticky uncured rubber-like appearance depending on the extent of main-chain degradation that occurs with selective crosslinking scission. Still, it has a significantly shorter scorch time than a new rubber compound. Therefore, our primary goal was to slow down the vulcanization process of dGTR and improve its mechanical properties via recipe development. We formulated several recipes (sulfur-, peroxide-, and phenolic resin-based) and studied the vulcanization process and the main properties of the revulcanized rubber sheets. We observed that the vulcanization process could be altered with different vulcanization methods: using peroxide and vulcanizing resin extended the process significantly. Peroxide vulcanization also provided enhanced elongation compared to sulfuric systems. With a balance of properties in mind, we selected a semi-efficient sulfur-based recipe and studied the characteristics of natural rubber/dGTR mixtures with the help of plasticizer oils. We successfully replaced a notable portion of natural rubber with dGTR, maintaining its properties without much compromise. LA - English DB - MTMT ER - TY - JOUR AU - Görbe, Ákos AU - Varga, László József AU - Bárány, Tamás TI - Development of nanoparticle-filled polypropylene-based single polymer composite foams JF - HELIYON J2 - HELIYON VL - 9 PY - 2023 IS - 9 PG - 15 SN - 2405-8440 DO - 10.1016/j.heliyon.2023.e19638 UR - https://m2.mtmt.hu/api/publication/34146121 ID - 34146121 N1 - Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3., Budapest, H-1111, Hungary MTA-BME Lendület Lightweight Polymer Composites Research Group, Műegyetem rkp. 3., Budapest, H-1111, Hungary Export Date: 21 September 2023 Correspondence Address: Bárány, T.; Department of Polymer Engineering, Műegyetem rkp. 3., Hungary; email: barany@pt.bme.hu LA - English DB - MTMT ER - TY - JOUR AU - Varga, László József AU - Bárány, Tamás TI - Development challenge for synthetic polymer fibers and tapes: improving toughness JF - EXPRESS POLYMER LETTERS J2 - EXPRESS POLYM LETT VL - 17 PY - 2023 IS - 10 SP - 991 EP - 991 PG - 1 SN - 1788-618X DO - 10.3144/expresspolymlett.2023.73 UR - https://m2.mtmt.hu/api/publication/34105679 ID - 34105679 N1 - Editorial corner – a personal view LA - English DB - MTMT ER - TY - CONF AU - Görbe, Ákos AU - Varga, László József AU - Bárány, Tamás ED - Barabás, István TI - Orientált polipropilén zsinegek fejlesztése és alkalmazásuk önerősített polimer kompozit erősítőanyagaként T2 - OGÉT 2023 PB - Erdélyi Magyar Műszaki Tudományos Társaság Gépészeti Szakosztály C1 - Kolozsvár T3 - Nemzetközi Gépészeti Találkozó (OGÉT), ISSN 2068-1267 ; 31. PY - 2023 SP - 171 EP - 176 PG - 6 UR - https://m2.mtmt.hu/api/publication/34062189 ID - 34062189 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Varga, László József AU - Görbe, Ákos AU - Bárány, Tamás TI - Polypropylene Blends for Highly Drawn Tapes with Improved Toughness JF - ACS OMEGA J2 - ACS OMEGA VL - 8 PY - 2023 IS - 25 SP - 22827 EP - 22835 PG - 9 SN - 2470-1343 DO - 10.1021/acsomega.3c01772 UR - https://m2.mtmt.hu/api/publication/34041292 ID - 34041292 N1 - Funding Agency and Grant Number: National Research, Development and Innovation Office, Hungary [2019-1.1.1-PIACI-KFI-2019-00335, TKP-6-6/PALY-2021]; Ministry of Culture and Innovation of Hungary from the National Research, Development and Innovation Fund [TKP2021-NVA] Funding text: This work was supported by the National Research, Development and Innovation Office, Hungary (2019-1.1.1-PIACI-KFI-2019-00335). Project no. TKP-6-6/PALY-2021 has been implemented with the support provided by the Ministry of Culture and Innovation of Hungary from the National Research, Development and Innovation Fund, financed under the TKP2021-NVA funding scheme. The authors are thankful to Evonik Resource Efficiency GmbH for providing the amorphous APAOs for the research. LA - English DB - MTMT ER - TY - JOUR AU - Zelenainé Kohári, Andrea AU - Bárány, Tamás TI - Termoplasztikus poliuretán alapú elasztomer fejlesztése újrahasznosított gumiőrlet társításával JF - MŰANYAG- ÉS GUMIIPARI ÉVKÖNYV J2 - MŰANYAG- ÉS GUMIIPARI ÉVKÖNYV VL - 21 PY - 2023 SP - 94 EP - 98 PG - 5 SN - 1589-6269 UR - https://m2.mtmt.hu/api/publication/34028419 ID - 34028419 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Varga, László József AU - Görbe, Ákos AU - Bárány, Tamás TI - Amorf poli-alfa-olefinnel adalékolt polipropilén mátrixú nyújtott nanokompozitok fejlesztése JF - POLIMEREK J2 - POLIMEREK VL - 9 PY - 2023 IS - 1 SP - 27 EP - 32 PG - 6 SN - 2415-9492 UR - https://m2.mtmt.hu/api/publication/33667047 ID - 33667047 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Simon, Dániel Ábel AU - Bárány, Tamás TI - Microwave Devulcanization of Ground Tire Rubber and Its Improved Utilization in Natural Rubber Compounds JF - ACS SUSTAINABLE CHEMISTRY & ENGINEERING J2 - ACS SUSTAIN CHEM ENG VL - 11 PY - 2023 IS - 5 SP - 1797 EP - 1808 PG - 12 SN - 2168-0485 DO - 10.1021/acssuschemeng.2c05984 UR - https://m2.mtmt.hu/api/publication/33648738 ID - 33648738 N1 - Correspondence Address: Bárány, T.; Department of Polymer Engineering, Műegyetem rkp. 3, Hungary; email: barany@pt.bme.hu LA - English DB - MTMT ER -