{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T16:25:08Z","timestamp":1791217508431,"version":"4.1.0"},"reference-count":39,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2023,2,15]],"date-time":"2023-02-15T00:00:00Z","timestamp":1676419200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"UBE Chem Europ","award":["20070252"],"award-info":[{"award-number":["20070252"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>Segmented thermoplastic polyurethanes (PU) were synthetized using a polycarbonatediol macrodiol as a flexible or soft segment with a molar mass of 2000 g\/mol, and different diisocyanate molecules and 1,4-butanediol as a rigid or hard segment. The diisocyanate molecules employed are 3,3\u2032-Dimethyl-4,4\u2032-biphenyl diisocyanate (TODI), 4,4\u2032-diphenylmethane diisocyanate (MDI), 4,4\u2032-Methylenebis(phenyl isocyanate) 1-isocyanato-4-[(4-phenylisocyanate)methyl]benzene and 1-isocyanate-4-[(2-phenylisocyanate) methyl]benzene (ratio 1:1) (MDIi), isophorone diisocyanate (IPDI), and hexamethylene diisocyanate (HDI). The polyurethanes obtained reveal a wide variation of microphase separation degree that is correlated with mechanical properties. Different techniques, such as DSC, DMA, and FTIR, have been used to determine flexible\u2013rigid segment phase behavior. Mechanical properties, such as tensile properties, Shore D hardness, and \u201ccompression set\u201d, have been determined. This work reveals that the structure of the hard segment is crucial to determine the degree of phase miscibility which affects the resulting mechanical properties, such as tensile properties, hardness, and \u201ccompression set\u201d.<\/jats:p>","DOI":"10.3390\/ma16041633","type":"journal-article","created":{"date-parts":[[2023,2,16]],"date-time":"2023-02-16T01:36:52Z","timestamp":1676511412000},"page":"1633","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":46,"title":["The Role of Diisocyanate Structure to Modify Properties of Segmented Polyurethanes"],"prefix":"10.3390","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4832-0957","authenticated-orcid":false,"given":"Manuel","family":"Asensio","sequence":"first","affiliation":[{"name":"Institute of Materials Science, University of Valencia, 46980 Paterna, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Juan-Francisco","family":"Ferrer","sequence":"additional","affiliation":[{"name":"Plastics Technology Centre (AIMPLAS), 46980 Paterna, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andr\u00e9s","family":"Nohales","sequence":"additional","affiliation":[{"name":"R&D Department UBE CORPORATION EUROPE, S.A., 12100 El Grao, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9244-9347","authenticated-orcid":false,"given":"Mario","family":"Culebras","sequence":"additional","affiliation":[{"name":"Institute of Materials Science, University of Valencia, 46980 Paterna, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7743-0389","authenticated-orcid":false,"given":"Clara M.","family":"G\u00f3mez","sequence":"additional","affiliation":[{"name":"Institute of Materials Science, University of Valencia, 46980 Paterna, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,2,15]]},"reference":[{"key":"ref_1","unstructured":"Hepburn, C. (2012). Polyurethane Elastomers, Springer Science & Business Media."},{"key":"ref_2","unstructured":"Wirpsza, Z. (1993). Polyurethanes: Chemistry, Technology, and Applications, Ellis Horwood Limited."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"915","DOI":"10.1016\/j.pmatsci.2006.11.001","article-title":"Synthesis methods, chemical structures and phase structures of linear polyurethanes. Properties and applications of linear polyurethanes in polyurethane elastomers, copolymers and ionomers","volume":"52","author":"Krol","year":"2007","journal-title":"Prog. Mater. Sci."},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Puszka, A. (2018). Thermal and mechanical behavior of new transparent thermoplastic polyurethane elastomers derived from cycloaliphatic diisocyanate. Polymers, 10.","DOI":"10.3390\/polym10050537"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"3346","DOI":"10.1016\/j.actbio.2009.05.014","article-title":"Effect of soft segment crystallization and hard segment physical crosslink on shape memory function in antibacterial segmented polyurethane ionomers","volume":"5","author":"Zhu","year":"2009","journal-title":"Acta Biomater."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"789","DOI":"10.3144\/expresspolymlett.2016.74","article-title":"Synthesis and characterization of flexible and high-temperature resistant polyimide aerogel with ultra-low dielectric constant","volume":"10","author":"Zhang","year":"2016","journal-title":"Express Polym. Lett."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"5687","DOI":"10.1021\/cr900181u","article-title":"Supramolecular polymerization","volume":"109","author":"Smulders","year":"2009","journal-title":"Chem. Rev."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"e202210748","DOI":"10.1002\/ange.202210748","article-title":"Block Poly (carbonate-ester) Ionomers as High-Performance and Recyclable Thermoplastic Elastomers","volume":"134","author":"Gregory","year":"2022","journal-title":"Angew. Chem."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"10172","DOI":"10.1021\/acs.chemmater.2c02972","article-title":"Combination of Dynamic and Coordination Chemistry Achieving Two-Method Recycling of Polyurethane","volume":"34","author":"Bai","year":"2022","journal-title":"Chem. Mater."},{"key":"ref_10","doi-asserted-by":"crossref","unstructured":"Asensio, M., Costa, V., Nohales, A., Bianchi, O., and G\u00f3mez, C.M. (2019). Tunable structure and properties of segmented thermoplastic polyurethanes as a function of flexible segment. Polymers, 11.","DOI":"10.3390\/polym11121910"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"1167","DOI":"10.1002\/(SICI)1099-0488(20000501)38:9<1167::AID-POLB8>3.0.CO;2-8","article-title":"On the origin of the multiple melting behavior in poly (ethylene naphthalene-2, 6-dicarboxylate): Microstructural study as revealed by differential scanning calorimetry and X-ray scattering","volume":"38","author":"Denchev","year":"2000","journal-title":"J. Polym. Sci. Part B Polym. Phys."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1002\/app.41704","article-title":"Structure-property relationships of polycarbonate diol-based polyurethanes as a function of soft segment content and molar mass","volume":"132","author":"Costa","year":"2015","journal-title":"J. Appl. Polym. Sci."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"217","DOI":"10.1177\/0095244312452274","article-title":"Enhanced polyurethanes based on different polycarbonatediols","volume":"45","author":"Costa","year":"2013","journal-title":"J. Elastomers Plast."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"502","DOI":"10.1177\/87560879221088939","article-title":"A review on microphase separation measurement techniques for polyurethanes","volume":"38","author":"Gholami","year":"2022","journal-title":"J. Plast. Film Sheeting"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"124429","DOI":"10.1016\/j.polymer.2021.124429","article-title":"Effect of the symmetry of polyether glycols on structure-morphology-property behavior of polyurethane elastomers","volume":"239","author":"Peng","year":"2022","journal-title":"Polymer"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"8032","DOI":"10.1016\/j.polymer.2006.09.003","article-title":"Temperature-resolved SAXS studies of morphological changes in melt-crystallized poly (hexamethylene terephthalate) and its melting upon heating","volume":"47","author":"Sun","year":"2006","journal-title":"Polymer"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"775","DOI":"10.1021\/ma00239a014","article-title":"Morphology and properties of segmented polyether polyurethaneureas","volume":"16","author":"Wang","year":"1983","journal-title":"Macromolecules"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"7365","DOI":"10.1021\/ma00052a045","article-title":"Multiphase Structure of a Segmented Polyurethane: Effects of Temperature and Annealing","volume":"25","author":"Yingjie","year":"1992","journal-title":"Macromolecules"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"1546","DOI":"10.1021\/ma0626362","article-title":"A comparison of hydrogen bonding and order in a polyurethane and poly(urethane-urea) and their blends with poly(ethylene glycol)","volume":"40","author":"Mattia","year":"2007","journal-title":"Macromolecules"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"1412","DOI":"10.1016\/j.eurpolymj.2009.02.011","article-title":"Surface modification and characterization of thermoplastic polyurethane","volume":"45","author":"Alves","year":"2009","journal-title":"Eur. Polym. J."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"1415","DOI":"10.1002\/pi.2291","article-title":"Effect of soft segment length on properties of hydrophilic\/hydrophobic polyurethanes","volume":"56","author":"Lin","year":"2007","journal-title":"Polym. Int."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"563","DOI":"10.1295\/polymj.31.563","article-title":"Thermal and Phase Behavior of Polyurethane Based on Chain Extender, 2,2-Bis-[4-(2-hydroxyethoxy)phenyl]propane","volume":"31","author":"Son","year":"1999","journal-title":"Polym. J."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"3708","DOI":"10.1016\/j.eurpolymj.2008.08.019","article-title":"Synthesis, characterization and mechanical properties of polyester-based aliphatic polyurethane elastomers containing hyperbranched polyester segments","volume":"44","author":"Zhang","year":"2008","journal-title":"Eur. Polym. J."},{"key":"ref_24","first-page":"848","article-title":"Studies on ageing performance of some novel polyurethanes","volume":"3","author":"Gopalakrishnan","year":"2011","journal-title":"J. Chem. Pharm. Res."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"224","DOI":"10.1007\/s10965-015-0871-7","article-title":"Effects of POSS addition on Non-isothermal crystallization and morphology of PVDF","volume":"22","author":"Martins","year":"2015","journal-title":"J. Polym. Res."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"68","DOI":"10.1021\/ma60043a015","article-title":"Infrared Studies of Hydrogen Bonding in Toluene Diisocyanate Based Polyurethanes","volume":"8","author":"Sung","year":"1975","journal-title":"Macromolecules"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"5068","DOI":"10.1021\/ma9618639","article-title":"Glass Transition Behaviors of a Polyurethane Hard Segment Based on 4,4\u2032-Diisocyanatodiphenylmethane and 1,4-Butanediol and the Calculation of Microdomain Composition","volume":"30","author":"Chen","year":"1997","journal-title":"Macromolecules"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"69","DOI":"10.1016\/j.polymdegradstab.2017.05.033","article-title":"The effect of pre-set extension on the degree of hydrolytic degradation in multicomponent polyurethane elastomers","volume":"142","author":"Hodan","year":"2017","journal-title":"Polym. Degrad. Stab."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"2629","DOI":"10.1016\/j.eurpolymj.2009.06.003","article-title":"The synthesis and characterization of new thermoplastic poly(carbonate-urethane) elastomers derived from HDI and aliphatic-aromatic chain extenders","volume":"45","author":"Kultys","year":"2009","journal-title":"Eur. Polym. J."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"297","DOI":"10.1002\/pen.20905","article-title":"Thermoplastic polyurethane elastomers based on polycarbonate diols with different soft segment molecular weight and chemical structure: Mechanical and thermal properties","volume":"48","author":"Eceiza","year":"2008","journal-title":"Polym. Eng. Sci."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"3073","DOI":"10.1016\/j.polymer.2006.02.093","article-title":"Effect of the degree of soft and hard segment ordering on the morphology and mechanical behavior of semicrystalline segmented polyurethanes","volume":"47","author":"Korley","year":"2006","journal-title":"Polymer"},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"901","DOI":"10.1016\/j.polymer.2012.12.018","article-title":"Influence of microstructure on micro-\/nano-mechanical measurements of select model transparent poly (urethane urea) elastomers","volume":"54","author":"Strawhecker","year":"2013","journal-title":"Polymer"},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"33","DOI":"10.1002\/adv.20086","article-title":"Synthesis and properties of transparent thermoplastic segmented polyurethanes","volume":"26","author":"Chen","year":"2007","journal-title":"Adv. Polym. Technol. J. Polym. Process. Inst."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"2586","DOI":"10.1002\/(SICI)1099-0488(19990915)37:18<2586::AID-POLB4>3.0.CO;2-A","article-title":"Domain structure and interphase dimensions in poly (urethaneurea) elastomers using DSC and SAXS","volume":"37","author":"Musselman","year":"1999","journal-title":"J. Polym. Sci. Part B Polym. Phys."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"6205","DOI":"10.1021\/ma00049a018","article-title":"Compression-Molded Polyurethane Block copolymers. 2. Evaluation of Microphase Compositions","volume":"25","author":"Koberstein","year":"1992","journal-title":"Macromolecules"},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"311","DOI":"10.1177\/009524403034393","article-title":"Thermal Degradation of Polyurethane Elastomers: Determination of Kinetic Parameters","volume":"35","author":"Rek","year":"2003","journal-title":"J. Elastomers Plast."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"167","DOI":"10.1002\/(SICI)1097-4628(20000103)75:1<167::AID-APP19>3.0.CO;2-N","article-title":"Properties of segmented polyurethanes derived from different diisocyanates","volume":"75","author":"Lee","year":"2000","journal-title":"J. Appl. Polym. Sci."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"509","DOI":"10.1002\/app.1990.070410305","article-title":"Polyurethane elastomers based on molecular weight advanced poly(ethylene ether carbonate) diols. II. Effects of variations in hard segment concentration","volume":"41","author":"Harris","year":"1990","journal-title":"J. Appl. Polym. Sci."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"616","DOI":"10.1016\/j.polymer.2006.11.021","article-title":"Mechanism for compression set of TDI polyurethane foams","volume":"48","author":"Sonnenschein","year":"2007","journal-title":"Polymer"}],"container-title":["Materials"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1996-1944\/16\/4\/1633\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T18:37:00Z","timestamp":1760121420000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1996-1944\/16\/4\/1633"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,2,15]]},"references-count":39,"journal-issue":{"issue":"4","published-online":{"date-parts":[[2023,2]]}},"alternative-id":["ma16041633"],"URL":"https:\/\/doi.org\/10.3390\/ma16041633","relation":{},"ISSN":["1996-1944"],"issn-type":[{"value":"1996-1944","type":"electronic"}],"subject":[],"published":{"date-parts":[[2023,2,15]]}}}