TY - JOUR AU - Decsi Balázsné Sayfo, Petra AU - Pölöskei, Kornél AU - Mészáros, László TI - Improving the mechanical and abrasion properties of silica-reinforced styrene-butadiene rubber composites by optimizing the concentrations of compatibilizers JF - POLYMER BULLETIN J2 - POLYM BULL PY - 2024 PG - 17 SN - 0170-0839 DO - 10.1007/s00289-024-05314-w UR - https://m2.mtmt.hu/api/publication/34893186 ID - 34893186 N1 - Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem Rkp. 3., Budapest, 1111, Hungary HUN-REN-BME Research Group for Composite Science and Technology, Műegyetem Rkp. 3., Budapest, 1111, Hungary Export Date: 31 May 2024 CODEN: POBUD Correspondence Address: Mészáros, L.; Department of Polymer Engineering, Műegyetem Rkp. 3., Hungary; email: meszaros.laszlo@gpk.bme.hu Funding details: Nemzeti Kutatási, Fejlesztési és Innovaciós Alap, NKFIA Funding details: Nemzeti Kutatási Fejlesztési és Innovációs Hivatal, NKFIH, 2017-2.3.6-TET-CN-2018-00002, ÚNKP-23-5-BME-434 Funding details: Nemzeti Kutatási Fejlesztési és Innovációs Hivatal, NKFIH Funding text 1: 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 research reported in this paper has been supported by the National Research, Development and Innovation Office, Hungary (2017-2.3.6-TET-CN-2018-00002). L\\u00E1szl\\u00F3 M\\u00E9sz\\u00E1ros is thankful for J\\u00E1nos Bolyai Research Scholarship of the Hungarian Academy of Sciences. This research was supported by the \\u00DANKP-23-5-BME-434 New National Excellence Program of the Ministry for Culture and Innovation from the source of the National Research, Development and Innovation Fund. AB - Silica (chemical formula SiO2) is a promising, more environmentally friendly alternative to carbon black (CB) used in the rubber industry as a filler. Although silica is already used in rubber products, it is not used as extensively as CB because the polar surface of silica cannot interact well with the apolar polymer molecules of the most frequently used rubbers. To solve this problem, experts have tried different grafting methods and several coupling agents for a stronger silica-elastomer connection. In this article, we used bis[3-(triethoxysilyl)propyl] tetrasulfide (TESPT) and polyethylene glycol (PEG) combined to improve the connection between the surface of silica and the apolar styrene-butadiene rubber (SBR) matrix. We examined mechanical and structural properties and found that adding 3 phr PEG and 4.5 phr TESPT to SBR is optimal for 60 phr silica content. This ratio of additives resulted in a 48% improvement in tensile strength. The positive effect of the coupling agents shows up in abrasion mass loss and tear strength as well. © The Author(s) 2024. LA - English DB - MTMT ER - TY - JOUR AU - Hüttl, A. AU - Nguyen, T.D. AU - Borzsák, S. AU - Süvegh, A. AU - Szentiványi, A. AU - Szilvácsku, I. AU - Kovács, D. AU - Dobránszky, János AU - Sótonyi, P. AU - Csobay-Novák, C. TI - Comparison of the Snare Loop Technique and the Hungaroring Reinforcement for Physician-Modified Endograft Fenestrations—An In Vitro Study JF - JOURNAL OF CARDIOVASCULAR DEVELOPMENT AND DISEASE J2 - J CARDIOVASC DEV DIS VL - 11 PY - 2024 IS - 5 PG - 6 SN - 2308-3425 DO - 10.3390/jcdd11050134 UR - https://m2.mtmt.hu/api/publication/34893182 ID - 34893182 N1 - Department of Interventional Radiology, Heart and Vascular Center, Semmelweis University, Városmajor u. 68., Budapest, 1122, Hungary Semmelweis Aortic Center, Semmelweis University, Városmajor u. 68., Budapest, 1122, Hungary Department of Materials Science and Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3-9, Budapest, 1111, Hungary ELKH-BME Research Group for Composite Science and Technology, Műegyetem rkp. 3-9, Budapest, 1111, Hungary Department of Vascular and Endovascular Surgery, Heart and Vascular Center, Semmelweis University, Városmajor u. 68., Budapest, 1122, Hungary Export Date: 31 May 2024 Correspondence Address: Csobay-Novák, C.; Department of Interventional Radiology, Városmajor u. 68., Hungary; email: csobay.csaba@semmelweis.hu AB - Background: We conducted an in vitro comparison of the snare loop reinforcement against a closed-loop reinforcement (Hungaroring) for physician-modified endograft (PMEG) fenestrations regarding preparation time and stability during flaring balloon dilatation. Materials and methods: The time to complete a PMEG fenestration with reinforcement was measured and compared between the Hungaroring and snare loop groups. The number of stitches was counted. Each fenestration was dilated using a 10 mm high-pressure, non-compliant balloon up to 21 atm in pressure, and fluoroscopic images were taken. The presence of indentation on the oversized balloon at the level of the reinforcement was evaluated at each fenestration. Results: Five fenestrations were created in each group (n = 5) for a total of ten pieces. The completion time in the snare loop group was 1070 s (IQR:1010–1090) compared to 760 s (IQR:685–784) in the Hungaroring group (p = 0.008). Faster completion time was achieved by faster stitching (23.2 s/stitch (IQR 22.8–27.3) for the snare loop group and 17.3 s/stitch (IQR 17.3–20.1) for the Hungaroring group (p = 0.016). None of the fluoroscopic images of the snare loop reinforcement showed an indentation on the balloon during the overexpansion; on the contrary, the Hungaroring showed indentation in every case, even at 21 atm. Conclusion: Fenestrations reinforced with Hungaroring can be completed significantly faster. Furthermore, the Hungaroring resists over-dilation even at high pressures, while snare loop reinforcements dilate at nominal pressure. © 2024 by the authors. LA - English DB - MTMT ER - TY - JOUR AU - Petrény, Roland AU - Bezerédi, Ádám AU - Mészáros, László TI - Electrically conductive polymer composites: Today’s most versatile materials? JF - EXPRESS POLYMER LETTERS J2 - EXPRESS POLYM LETT VL - 18 PY - 2024 IS - 7 SP - 673 EP - 674 PG - 2 SN - 1788-618X DO - 10.3144/expresspolymlett.2024.49 UR - https://m2.mtmt.hu/api/publication/34893177 ID - 34893177 N1 - Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3, Budapest, H-1111, Hungary HUN-REN–BME Research Group for Composite Science and Technology, Műegyetem rkp. 3, Budapest, H-1111, Hungary Export Date: 31 May 2024 Correspondence Address: Mészáros, L.; Department of Polymer Engineering, Műegyetem rkp. 3, Hungary; email: meszaros@pt.bme.hu LA - English DB - MTMT ER - TY - GEN AU - Tóth, Csenge AU - Lukács, Norbert AU - Kovács, Norbert Krisztián TI - The role of the fiber–matrix interface in the tensile properties of short fiber–reinforced 3D-printed polylactic acid composites PY - 2024 UR - https://m2.mtmt.hu/api/publication/34891019 ID - 34891019 LA - English DB - MTMT ER - TY - JOUR AU - Tóth, Csenge AU - Virág, Ábris Dávid AU - Vas, László Mihály AU - Kovács, Norbert Krisztián TI - Prediction and analysis of flexural stiffness for 3D-printed continuous fiber–reinforced composites with different matrix fill ratios and layer orders JF - POLYMER TESTING J2 - POLYM TEST VL - 135 PY - 2024 PG - 11 SN - 0142-9418 DO - 10.1016/j.polymertesting.2024.108459 UR - https://m2.mtmt.hu/api/publication/34876276 ID - 34876276 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: 31 May 2024 CODEN: POTED Correspondence Address: Kovács, N.K.; Department of Polymer Engineering, Műegyetem rkp. 3., Hungary; email: kovacsn@pt.bme.hu Funding details: Nemzeti Kutatási Fejlesztési és Innovációs Hivatal, NKFIH Funding details: Nemzeti Kutatási, Fejlesztési és Innovaciós Alap, NKFIA Funding details: Hungarian Scientific Research Fund, OTKA, FK134336 Funding details: Hungarian Scientific Research Fund, OTKA Funding details: ÚNKP-23-5-BME-466 Funding details: Magyar Tudományos Akadémia, MTA, ÚNKP-23-3-II-BME-140 Funding details: Magyar Tudományos Akadémia, MTA Funding text 1: 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 research reported in this paper was supported by the National Research, Development and Innovation Office (NRDI, Hungary) through grants OTKA FK134336. The project 2022-2.1.1-NL-2022-00012 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 2022-2.1.1-NL Creation of National Laboratories, Complex Development funding scheme. Norbert Kriszti\\u00E1n Kov\\u00E1cs is thankful for the support of the \\u00DANKP-23-5-BME-466 New National Excellence Program of the Ministry for Culture and Innovation from the source of the National Research, Development and Innovation Fund and the J\\u00E1nos Bolyai Research Scholarship of the Hungarian Academy of Sciences. Csenge T\\u00F3th is thankful for the support of the \\u00DANKP-23-3-II-BME-140 supported by the New National Excellence Program of the Ministry for Culture and Innovation from the source of the National Research, Development and Innovation Fund. LA - English DB - MTMT ER - TY - CONF AU - Dremák, Csenge AU - Gere, Dániel AU - Czigány, Tibor TI - Farost-erősítésű kompozit előállítása szelektíven gyűjtött poliolefin kupakból és fa hulladékból T2 - OGÉT 2024 - XXXII. Nemzetközi Gépészeti Konferencia PB - Erdélyi Magyar Műszaki Tudományos Társaság (EMT) T3 - Nemzetközi Gépészeti Találkozó (OGÉT), ISSN 2068-1267 ; 32. PY - 2024 SP - 88 EP - 93 PG - 6 UR - https://m2.mtmt.hu/api/publication/34875427 ID - 34875427 LA - Hungarian DB - MTMT ER - TY - CONF AU - Geier, Norbert AU - Seprős, Szilárd AU - Poór, Dániel István TI - Térhálós epoxy gyanta forgácsolhatósági vizsgálata hosszesztergálási kísérletekkel T2 - OGÉT 2024 - XXXII. Nemzetközi Gépészeti Konferencia PB - Erdélyi Magyar Műszaki Tudományos Társaság (EMT) T3 - Nemzetközi Gépészeti Találkozó (OGÉT), ISSN 2068-1267 ; 32. PY - 2024 SP - 136 EP - 140 PG - 5 UR - https://m2.mtmt.hu/api/publication/34829896 ID - 34829896 AB - A térhálós polimereket előszeretettel alkalmazzák a nagyszilárdságú szálerősített polimer (FRP) kompozit szerkezetek mátrixanyagaként. Ezen FRP kompozitok forgácsolása sokszor szükséges, azonban forgácsolástechnológiai tervezésük bonyolult. Az FRP kompozitok forgácsolástechnológiai tervezésének támogatása érdekében ebben a kutatásban térhálós epoxy gyanta forgácsolhatóságát vizsgáltuk hosszesztergálási kísérletekkel. Az előtolást, a forgácsolási sebességet és a fogásmélységet variáltuk kétszintes teljes faktoriális kísérletterv alapján. A forgácsolási erőt egy KISTLER 9263A háromkomponenses erőmérővel mértük. A forgácsolt felület minőségét egy Mitutoyo SJ400 típusú kontakt profilométerrel vizsgáltuk. A fő- és kereszthatások szignifikanciáját varianciaanalízissel (ANOVA) értékeltük ki. Az ANOVA eredmények alapján mindhárom vizsgált faktornak szignifikáns hatása van a forgácsolási erőre és a felület minőségére is, így ezen faktorok körültekintő megválasztása kardinális fontosságú. LA - Hungarian DB - MTMT ER - TY - JOUR AU - Toldy, Andrea AU - Poór, Dániel István AU - Szolnoki, Beáta AU - Devecser, Boglárka AU - Geier, Norbert AU - Pomázi, Ákos TI - Comparative study of flame retardancy in polyimine vitrimers and composites: Evaluating additive and reactive flame retardants acting via gas-, solid-, and combined-phase mechanisms JF - JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY J2 - J MATER SCI TECHNOL VL - 196 PY - 2024 SP - 101 EP - 111 PG - 11 SN - 1005-0302 DO - 10.1016/j.jmst.2024.01.047 UR - https://m2.mtmt.hu/api/publication/34822025 ID - 34822025 N1 - Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, H-1111 Budapest, Műegyetem rkp. 3, Hungary MTA-BME Lendület Sustainable Polymers Research Group, Műegyetem rkp. 3, H-1111, Budapest, Hungary Budapest University of Technology and Economics, Faculty of Mechanical Engineering, Department of Manufacturing Science and Engineering, Műegyetem rkp. 3., Budapest 1111, Hungary Department of Organic Chemistry and Technology, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, H-1111 Budapest, Műegyetem rkp. 3, Hungary HUN-REN–BME Research Group for Composite Science and Technology, Műegyetem rkp. 3., H-1111, Budapest, Hungary Export Date: 26 April 2024 CODEN: JSCTE Correspondence Address: Toldy, A.; Department of Polymer Engineering, H-1111 Budapest, Műegyetem rkp. 3, Hungary; email: atoldy@edu.bme.hu AB - We developed flame retarded polyimine type vitrimers and carbon fibre reinforced composites using two additive and a reactive flame retardant containing phosphorus: ammonium polyphosphate (APP), resorcinol bis(diphenyl phosphate) (RDP); and N,N',N’’-tris(2-aminoethyl)-phosphoric acid triamide (TEDAP). We characterised the vitrimer matrix materials by differential scanning calorimetry (DSC), thermal analysis (TGA), limiting oxygen index (LOI), UL-94 test and mass loss calorimetry (MLC), while the vitrimer composites by LOI, UL-94 test, MLC and dynamic mechanical analysis (DMA). We compared the performance of the vitrimer systems to a benchmark pentaerythritol-based aliphatic epoxy resin system (PER). The vitrimer reference had higher thermal stability but lower fire performance than the PER aliphatic reference epoxy. At lower phosphorus content, the vitrimer systems exhibited a melting above their vitrimer transition temperature, which negatively affected their LOI and UL-94 results. From 2% phosphorus content, rapid charring and extinguishing of vitrimers prevented the softening and deforming. The superior performance of these same flame retardants in vitrimer systems could be attributed to the high nitrogen content of imine-based vitrimers in combination with phosphorus flame retardants, exploiting nitrogen-phosphorus synergism. In both matrices, flame retardants with solid phase action lead to better fire performance, while in composites, the lowest peak heat release rates (152 kW/m2 in vitrimer composite) were achieved with RDP acting predominantly in the gas phase, as carbon fibres hindered the intumescent phenomenon. © 2024 LA - English DB - MTMT ER - TY - JOUR AU - Gere, Dániel AU - Pomázi, Flóra AU - Szöllősi, Anna AU - Jahanpeyma, Pegah AU - Ermilov, Alexander Anatol AU - Baranya, Sándor AU - Toldy, Andrea TI - Mikroműanyag szennyezés vizsgálata a Duna budapesti szakaszán JF - POLIMEREK J2 - POLIMEREK VL - 10 PY - 2024 IS - 2 SP - 66 EP - 72 PG - 7 SN - 2415-9492 UR - https://m2.mtmt.hu/api/publication/34805619 ID - 34805619 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Vajtai, Lili AU - Nemes, Norbert Marcel AU - Morales, Maria del Puerto AU - Molnár, Kolos AU - Pinke, Balazs Gabor AU - Simon, Ferenc TI - Incidence of the Brownian Relaxation Process on the Magnetic Properties of Ferrofluids JF - NANOMATERIALS J2 - NANOMATERIALS-BASEL VL - 14 PY - 2024 IS - 7 PG - 15 SN - 2079-4991 DO - 10.3390/nano14070634 UR - https://m2.mtmt.hu/api/publication/34801218 ID - 34801218 N1 - Department of Physics, Institute of Physics, HUN-REN-BME Condensed Matter Research Group, Budapest University of Technology and Economics, Műegyetem rkp. 3., Budapest, H-1111, Hungary Departamento de Física de Materiales, Universidad Complutense de Madrid, Madrid, 28040, Spain Department of Nanoscience and Nanotechnology, Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Madrid, 28049, Spain Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3., Budapest, H-1111, Hungary HUN–REN–BME Research Group for Composite Science and Technology, Műegyetem rkp. 3., Budapest, H-1111, Hungary MTA-BME Lendület Sustainable Polymers Research Group, Műegyetem rkp. 3., Budapest, H-1111, Hungary Institute for Solid State Physics and Optics, HUN-REN Wigner Research Centre for Physics, P.O. Box 49, Budapest, H-1525, Hungary Export Date: 22 April 2024 Correspondence Address: Nemes, N.M.; Departamento de Física de Materiales, Spain; email: nmnemes@ucm.es AB - Ferrofluids containing magnetic nanoparticles represent a special class of magnetic materials due to the added freedom of particle tumbling in the fluids. We studied this process, known as Brownian relaxation, and its effect on the magnetic properties of ferrofluids with controlled magnetite nanoparticle sizes. For small nanoparticles (below 10 nm diameter), the Neel process is expected to dominate the magnetic response, whereas for larger particles, Brownian relaxation becomes important. Temperature- and magnetic-field-dependent magnetization studies, differential scanning calorimetry, and AC susceptibility measurements were carried out for 6 and 13.5 nm diameter magnetite nanoparticles suspended in water. We identify clear fingerprints of Brownian relaxation for the sample of large-diameter nanoparticles as both magnetic and thermal hysteresis develop at the water freezing temperature, whereas the samples of small-diameter nanoparticles remain hysteresis-free down to the magnetic blocking temperature. This is supported by the temperature-dependent AC susceptibility measurements: above 273 K, the data show a low-frequency Debye peak, which is characteristic of Brownian relaxation. This peak vanishes below 273 K. LA - English DB - MTMT ER -