{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,7]],"date-time":"2026-05-07T09:11:25Z","timestamp":1778145085013,"version":"3.51.4"},"reference-count":63,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2026,5,6]],"date-time":"2026-05-06T00:00:00Z","timestamp":1778025600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Polymers"],"abstract":"<jats:p>Concerns about the environmental and health impacts of plasticized poly (vinyl chloride) (PVC), from plasticizer loss to microplastic formation, have created a clear demand to find alternative packaging materials for medical and pharmaceutical use. As a possible polyolefin-based alternative, we blended polypropylene\u2013ethylene copolymers with different ethylene content-controlled phase structures with styrene\u2013ethylene\/butylene\u2013styrene block copolymer (SEBS), as modifier. SEBS is elastomeric and performs mechanically like a cross-linked rubber due to its unique microphase-separated morphology of hard spherical polystyrene (PS) domains dispersed in the soft elastomeric ethylene-butylene copolymer (EB) phase. Tests with injection-molded samples and cast films demonstrated promising combinations of flexibility, durability, and transparency\u2014qualities essential for soft medical packaging like infusion pouches and blow\u2013fill\u2013seal bottles. For the desired level of flexibility (reflected by a flexural modulus of 150\u2013250 MPa), blends with two random-heterophasic (RAHECO) copolymers achieved the lower limit with only 15\u201325 wt.-% SEBS, compared to the 37 wt.-% needed for a single-phase random copolymer (RACO). These blends also exhibited greater toughness and excellent transparency. In contrast, a standard impact copolymer (HECO), with its more crystalline matrix, required a higher modifier content of 45 wt.-% SEBS. Film morphology analysis indicated a gradual shift in disperse phase structure and orientation, leading to phase inversion at the highest SEBS content without negatively affecting transparency.<\/jats:p>","DOI":"10.3390\/polym18091140","type":"journal-article","created":{"date-parts":[[2026,5,7]],"date-time":"2026-05-07T08:01:39Z","timestamp":1778140899000},"page":"1140","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Designing Soft and Transparent Films Based on Multi-Phase Polypropylene Copolymers and Styrene Block Copolymers"],"prefix":"10.3390","volume":"18","author":[{"given":"Markus","family":"Gahleitner","sequence":"first","affiliation":[{"name":"Borealis Polyolefine GmbH, St. Peterstr. 25, 4021 Linz, Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dietrich","family":"Gloger","sequence":"additional","affiliation":[{"name":"Borealis Polyolefine GmbH, St. Peterstr. 25, 4021 Linz, Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Katja","family":"Klimke","sequence":"additional","affiliation":[{"name":"Borealis Polyolefine GmbH, St. Peterstr. 25, 4021 Linz, Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Martina","family":"Sandholzer","sequence":"additional","affiliation":[{"name":"Borealis Polyolefine GmbH, St. Peterstr. 25, 4021 Linz, Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jingbo","family":"Wang","sequence":"additional","affiliation":[{"name":"Borealis Polyolefine GmbH, St. Peterstr. 25, 4021 Linz, Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2026,5,6]]},"reference":[{"key":"ref_1","unstructured":"Patravale, V., Disouza, J., and Shahiwala, A. (2024). Chapter 9\u2014Polymers in medical devices and pharmaceutical packaging. Polymers for Pharmaceutical and Biomedical Applications, Elsevier."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"100","DOI":"10.1002\/1097-0274(200101)39:1<100::AID-AJIM10>3.0.CO;2-Q","article-title":"Health risks posed by use of Di-2-ethylhexyl phthalate (DEHP) in PVC medical devices: A critical review","volume":"39","author":"Tickner","year":"2001","journal-title":"Am. J. Ind. Med."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1750368","DOI":"10.1155\/2018\/1750368","article-title":"Toxic Effects of Di-2-ethylhexyl Phthalate: An Overview","volume":"2018","author":"Rowdhwal","year":"2018","journal-title":"BioMed Res. Int."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"986","DOI":"10.1016\/j.scitotenv.2015.09.148","article-title":"Phthalate esters in the environment: A critical review of their occurrence, biodegradation, and removal during wastewater treatment processes","volume":"541","author":"Gao","year":"2016","journal-title":"Sci. Total Environ."},{"key":"ref_5","first-page":"1185","article-title":"Costs and benefits of recycling PVC contaminated with the legacy hazardous plasticizer DEHP","volume":"39","author":"Brignon","year":"2021","journal-title":"Waste Manag. Res. J. Sustain. Circ. Econ."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"133246","DOI":"10.1016\/j.jhazmat.2023.133246","article-title":"Quantitative analysis of microplastics and nanoplastics released from disposable PVC infusion tubes","volume":"465","author":"Zheng","year":"2024","journal-title":"J. Hazard. Mater."},{"key":"ref_7","unstructured":"Karger-Kocsis, J., and B\u00e1r\u00e1ny, T. Polypropylene Copolymers. Polypropylene Handbook, Springer."},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Bergstra, M.E., Denifl, P., Gahleitner, M., Jeremic, D., Kanellopoulos, V., Mileva, D., Shutov, P., Touloupidis, V., and Tranninger, C. (2022). Polymerization in the Borstar polypropylene hybrid process: Combining technology and catalyst for optimized product performance. Polymers, 14.","DOI":"10.3390\/polym14214763"},{"key":"ref_9","unstructured":"Nicola, T., and Kreischer, T. (2026, April 20). Medical Bag, EP 0765654 A1 for Fresenius AG. Available online: https:\/\/worldwide.espacenet.com\/patent\/search\/family\/040091444\/publication\/EP0765654A1?q=ep0765654."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"110001","DOI":"10.1063\/1.4965575","article-title":"Polypropylene and polypropylene-elastomer blends for medical packaging","volume":"1779","author":"Sandholzer","year":"2016","journal-title":"AIP Conf. Proc."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"080001","DOI":"10.1063\/1.5084875","article-title":"Morphology-property-relationships of SEBS\/PP compounds for medical application","volume":"2055","author":"Kiehle","year":"2019","journal-title":"AIP Conf. Proc."},{"key":"ref_12","doi-asserted-by":"crossref","unstructured":"Murthe, S.S., Sreekantan, S., and Mydin, R.B.S.M.N. (2022). Study on the Physical, Thermal and Mechanical Properties of SEBS\/PP (Styrene-Ethylene-Butylene-Styrene\/Polypropylene) Blend as a Medical Fluid Bag. Polymers, 14.","DOI":"10.3390\/polym14163267"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"14379","DOI":"10.1038\/s41598-023-41477-8","article-title":"Shelf-life, bioburden, water and oxygen permeability studies of laser welded SEBS\/PP blended polymer","volume":"13","author":"Murthe","year":"2023","journal-title":"Sci. Rep."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"e70731","DOI":"10.1002\/app.70731","article-title":"Synergistic Effect of SEBS and Oil Small Molecule Additions for Toughening PP","volume":"143","author":"Li","year":"2026","journal-title":"J. Appl. Polym. Sci."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"5760","DOI":"10.1021\/ma9607271","article-title":"Morphological Characteristics of SEBS Thermoplastic Elastomer Gels","volume":"29","author":"Laurer","year":"1996","journal-title":"Macromolecules"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"1025","DOI":"10.1016\/S0921-4526(97)00784-9","article-title":"Networks of gel-forming triblock copolymer solutions: In situ SANS and rheological measurements","volume":"241","author":"Mortensen","year":"1997","journal-title":"Phys. B Condens. Matter"},{"key":"ref_17","unstructured":"Bicy, K., Jiji, A., Hanna, J.M., and Thomas, S. (2018). Styrene\u2013Butadiene Copolymers. Encyclopedia of Polymer Science and Technology, John Wiley and Sons."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"e52942","DOI":"10.1002\/app.52942","article-title":"Styrenic block copolymer-based thermoplastic elastomers in smart applications: Advances in synthesis, microstructure, and structure\u2013property relationships\u2014A review","volume":"139","author":"Maji","year":"2022","journal-title":"J. Appl. Polym. Sci."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"1891","DOI":"10.1002\/(SICI)1097-4628(19980620)68:12<1891::AID-APP1>3.0.CO;2-G","article-title":"Influence of rubber particle size on mechanical properties of polypropylene\u2013SEBS blends","volume":"68","author":"Stricker","year":"1998","journal-title":"J. Appl. Polym. Sci."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"2185","DOI":"10.1002\/app.2066","article-title":"Toughening of polypropylene with styrene\/ethylene-butylene\/styrene tri-block copolymer: Effects of mixing condition and elastomer content","volume":"82","author":"Bassani","year":"2001","journal-title":"J. Appl. Polym. Sci."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"254","DOI":"10.1002\/app.21263","article-title":"SBS and SEBS Block Copolymers as Impact Modifiers for Polypropylene Compounds","volume":"95","author":"Abreu","year":"2005","journal-title":"J. Appl. Polym. Sci."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"1630","DOI":"10.1002\/pen.20298","article-title":"The Effect of the Volume Fraction of Dispersed Phase on Toughness of Injection Molded Polypropylene Blended with SEBS, SEPS. and SEP","volume":"45","author":"Matsuda","year":"2005","journal-title":"Polym. Eng. Sci."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"688","DOI":"10.3144\/expresspolymlett.2012.74","article-title":"Mechanical and optical effects of elastomer interaction in polypropylene modification: Ethylene-propylene rubber, poly-(ethylene-co-octene) and styrene-butadiene elastomers","volume":"6","author":"Grein","year":"2012","journal-title":"Express Polym. Lett."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"80","DOI":"10.1002\/pen.20886","article-title":"Optimizing the Balance Between Impact Strength and Stiffness in Polypropylene\/Elastomer Blends by Incorporation of a Nucleating Agent","volume":"48","author":"Fanegas","year":"2008","journal-title":"Polym. Eng. Sci."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"331","DOI":"10.1002\/pen.21540","article-title":"Highly Transparent Thermoplastic Elastomer From Isotactic Polypropylene and Styrene\/Ethylene-Butylene\/Styrene Triblock Copolymer: Structure-Property Correlations","volume":"50","author":"Ahmad","year":"2010","journal-title":"Polym. Eng. Sci."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"180286","DOI":"10.1016\/j.tca.2026.180286","article-title":"Effect of styrene-ethylene-butylene-styrene triblock copolymer on the non-isothermal crystallization kinetics and melting behavior of polypropylene","volume":"759","author":"Sun","year":"2026","journal-title":"Thermochim. Acta"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"291","DOI":"10.1002\/(SICI)1097-4628(19990411)72:2<291::AID-APP14>3.0.CO;2-7","article-title":"Compatibilization effects of styrenic\/rubber block copolymers in polypropylene\/polystyrene blends","volume":"72","year":"1999","journal-title":"J. Appl. Polym. Sci."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"261","DOI":"10.1177\/147776060502100402","article-title":"Effect of SEBS on the Mechanical Properties and Miscibility of Polystyrene Rich Polystyrene\/Polypropylene Blends","volume":"21","author":"Samsudin","year":"2005","journal-title":"Prog. Rubber Plast. Recycl. Technol."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"075316","DOI":"10.1088\/2053-1591\/ab131c","article-title":"Tailoring PS\/PP recycled blends compatibilized with SEBS. Evaluation of rheological, mechanical, thermomechanical and morphological characters","volume":"6","author":"Luna","year":"2019","journal-title":"Mater. Res. Express"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"1873","DOI":"10.1002\/pen.20897","article-title":"Mechanical properties of wollastonite-reinforced polypropylene composites modified with SEBS and SEBS-g-MA elastomers","volume":"47","author":"Musil","year":"2007","journal-title":"Polym. Eng. Sci."},{"key":"ref_31","doi-asserted-by":"crossref","unstructured":"Liu, S., Qiu, J., Han, L., Luan, J., Ma, X., and Chen, W. (2023). Effect of SEBS Molecular Structure and Formula Composition on the Performance of SEBS\/PP TPE for Automotive Interior Skin. Polymers, 15.","DOI":"10.3390\/polym15122753"},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"528","DOI":"10.1002\/pen.24764","article-title":"Upcycling of contaminated post-industrial polypropylene waste: A design from recycling case study","volume":"58","author":"Ragaert","year":"2018","journal-title":"Polym. Eng. Sci."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"240","DOI":"10.1016\/j.polymer.2017.07.024","article-title":"High-strength and super-tough PA6\/PS\/PP\/SEBS quaternary blends compatibilized by using a highly effective multi-phase compatibilizer: Toward efficient recycling of waste plastics","volume":"123","author":"Li","year":"2017","journal-title":"Polymer"},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"1139","DOI":"10.1007\/s00396-025-05407-6","article-title":"Effect of SEBS-g-MA on recycled PS\/HDPE blend miscibility","volume":"303","author":"Davidyants","year":"2025","journal-title":"Colloid Polym. Sci."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"3466","DOI":"10.1002\/app.10772","article-title":"Toughening of polypropylene with styrene\/ethylene-butylene\/styrene tri-block copolymer: Effects of reactive and nonreactive compatibilization","volume":"86","author":"Bassani","year":"2002","journal-title":"J. Appl. Polym. Sci."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"981","DOI":"10.1002\/app.33123","article-title":"Dynamically vulcanized polypropylene\/styrene\u2013butadiene rubber blends: The effect of a peroxide\/bismaleimide curing system and composition","volume":"120","author":"Leite","year":"2011","journal-title":"J. Appl. Polym. Sci."},{"key":"ref_37","unstructured":"Ek, C.-G., Gahleitner, M., Wang, J., and Bernreitner, K. (2026, April 20). Soft Polypropylene with Improved Properties. EP 3615098 A1 for Borealis AG. Available online: https:\/\/worldwide.espacenet.com\/patent\/search\/family\/058640725\/publication\/EP3615098A1?q=EP%203615098%20A1."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"2100302","DOI":"10.1002\/macp.202100302","article-title":"Catalyst type effects on structure\/property relations of polypropylene random copolymers","volume":"222","author":"Paulik","year":"2021","journal-title":"Macromol. Chem. Phys."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"1083","DOI":"10.1007\/s00397-007-0200-0","article-title":"Melt viscosity effects in Ethylene-Propylene Copolymers","volume":"46","author":"Grein","year":"2007","journal-title":"Rheol. Acta"},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"75","DOI":"10.1016\/S0032-3861(97)00219-X","article-title":"Fracture Toughness of Polypropylene Copolymers: Influence of Interparticle Distance and Temperature","volume":"39","author":"Starke","year":"1998","journal-title":"Polymer"},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"450","DOI":"10.1177\/0095244320947765","article-title":"Structure-property correlation of an impact-modified random polypropylene copolymer","volume":"53","author":"Pereira","year":"2020","journal-title":"J. Elastom. Plast."},{"key":"ref_42","unstructured":"Ciafaroni, M., Massari, P., Biondini, G., Caputo, T., and Galvan, M. (2026, April 20). Propylene Polymer Compositions, EP 2432809 A1 for Basell Poliolefine SrI. Available online: https:\/\/worldwide.espacenet.com\/patent\/search\/family\/043125755\/publication\/EP2432809A1?q=EP2432809A1."},{"key":"ref_43","unstructured":"(2022). Plastics\u2014Determination of the Melt Mass-Flow Rate (MFR) and Melt Volume-Flow Rate (MVR) of Thermoplastics, Part 1: Standard Method (Standard No. ISO1133-1:2022)."},{"key":"ref_44","unstructured":"(2018). Plastics\u2014Differential Scanning Calorimetry (DSC), Part 3: Determination of Temperature and Enthalpy of Melting and Crystallization (Standard No. ISO11357-3:2018)."},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"1900796","DOI":"10.1002\/adem.201900796","article-title":"On the Determination of the Enthalpy of Fusion of \u03b1-Crystalline Isotactic Polypropylene Using Differential Scanning Calorimetry, X-Ray Diffraction, and Fourier Transform Infrared Spectroscopy: An Old Story Revisited","volume":"22","author":"Lanyi","year":"2020","journal-title":"Adv. Eng. Mater."},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"1157","DOI":"10.1021\/ma991614v","article-title":"Structural Analysis of Ethylene\/Propylene Copolymers Synthesized with a Constrained Geometry Catalyst","volume":"33","author":"Wang","year":"2000","journal-title":"Macromolecules"},{"key":"ref_47","unstructured":"(2022). Plastics\u2014Determination of Xylene-Soluble Matter in Polypropylene (Standard No. ISO 16152:2022)."},{"key":"ref_48","unstructured":"(2021). Plastics\u2014Determination of the Viscosity of Polymers in Dilute Solution Using Capillary Viscometers, Part 1: General Principles (Standard No. ISO 1628-1:2021)."},{"key":"ref_49","unstructured":"(2019). Plastics\u2014Determination of Flexural Properties (Standard No. ISO178:2019)."},{"key":"ref_50","unstructured":"(2007). Plastics\u2014Polypropylene (PP) Moulding and Extrusion Materials, Part 2: Preparation of Test Specimens and Determination of Properties (Standard No. ISO 1873-2:2007)."},{"key":"ref_51","unstructured":"(2010). Plastics\u2014Determination of Charpy Impact Properties, Part 1: Non-Instrumented Impact Test (Standard No. ISO 179-1:2010)."},{"key":"ref_52","unstructured":"Standard Test Method for Haze and Luminous Transmittance of Transparent Plastics (Standard No. ASTM D1003-21)."},{"key":"ref_53","doi-asserted-by":"crossref","unstructured":"Di Sacco, F., Gahleitner, M., Wang, J., and Portale, G. (2020). Systematic Investigation on the Structure-Property Relationship in Isotactic Polypropylene Films Processed via Cast Film Extrusion. Polymers, 12.","DOI":"10.3390\/polym12081636"},{"key":"ref_54","unstructured":"(2018). Plastics\u2014Determination of Tensile Properties, Part 3: Test Conditions for Films and Sheets (Standard No. ISO 527-3:2018)."},{"key":"ref_55","unstructured":"(2022). Plastics Film and Sheeting\u2014Determination of Impact Resistance by the Free-Falling Dart Method, Part 2: Instrumented Puncture Test (Standard No. ISO 7765-2:2022)."},{"key":"ref_56","doi-asserted-by":"crossref","first-page":"1497","DOI":"10.1016\/0032-3861(86)90094-7","article-title":"Lamellar morphologies of melt-crystallized polyethylene, isotactic polypropylene and ethylene-propylene copolymers by the RuO4 staining technique","volume":"27","author":"Sano","year":"1986","journal-title":"Polymer"},{"key":"ref_57","doi-asserted-by":"crossref","first-page":"1152","DOI":"10.1002\/1097-4628(20001031)78:5<1152::AID-APP250>3.0.CO;2-7","article-title":"Characterization of Modified Polypropylene by Scanning Electron Microscopy","volume":"78","author":"Ingolic","year":"2000","journal-title":"J. Appl. Polym. Sci."},{"key":"ref_58","unstructured":"W\u00f6rz, A., Beuzelin, F., Schmidt, C.-U., Maurer, T., M\u00fcller, J., Freudenstein, M., and Mannebach, G. (2026, April 20). High Pressure LDPE for Medical Applications, EP 2239283 A1 for Basell Polyolefine GmbH. Available online: https:\/\/worldwide.espacenet.com\/patent\/search\/family\/042292867\/publication\/EP2239283A1?q=pn%3DUS8969501B2."},{"key":"ref_59","unstructured":"Grumezescu, V., and Grumezescu, A.M. (2019). Polyethylene and polypropylene matrix composites for biomedical applications. Materials for Biomedical Engineering, Elsevier."},{"key":"ref_60","unstructured":"Schedenig, T., Grein, C., and Gloger, D. (2026, April 20). Composition Based on Polypropylene Compounds with Styrenic Elastomers, EP 2310450 A1 for Borealis AG. Available online: https:\/\/worldwide.espacenet.com\/patent\/search\/family\/039892374\/publication\/EP2310450A1?q=EP%202310450%20A1."},{"key":"ref_61","doi-asserted-by":"crossref","first-page":"2825","DOI":"10.1002\/app.22921","article-title":"Phase Interactions and Structure Evolution of Heterophasic Ethylene\u2013Propylene Copolymers as a Function of System Composition","volume":"101","author":"Doshev","year":"2006","journal-title":"J. Appl. Polym. Sci."},{"key":"ref_62","doi-asserted-by":"crossref","first-page":"282","DOI":"10.3144\/expresspolymlett.2014.31","article-title":"Polypropylene\/ethylene-propylene rubber (PP\/EPR) blends for the automotive industry: Basic correlations between EPR-design and shrinkage","volume":"8","author":"Grestenberger","year":"2014","journal-title":"Express Polym. Lett."},{"key":"ref_63","first-page":"199","article-title":"Recycling of medical plastics","volume":"4","author":"Joseph","year":"2021","journal-title":"Adv. Ind. Eng. Polym. Res."}],"container-title":["Polymers"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2073-4360\/18\/9\/1140\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,5,7]],"date-time":"2026-05-07T08:22:10Z","timestamp":1778142130000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2073-4360\/18\/9\/1140"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,5,6]]},"references-count":63,"journal-issue":{"issue":"9","published-online":{"date-parts":[[2026,5]]}},"alternative-id":["polym18091140"],"URL":"https:\/\/doi.org\/10.3390\/polym18091140","relation":{},"ISSN":["2073-4360"],"issn-type":[{"value":"2073-4360","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,5,6]]}}}