Green TPUs from Prepolymer Mixtures Designed by Controlling the Chemical Structure of Flexible Segments
This study concerns green thermoplastic polyurethanes (TPU) obtained by controlling the chemical structure of flexible segments. Two types of bio-based polyether polyols—poly(trimethylene glycol)s—with average molecular weights ca. 1000 and 2700 Da were used (PO3G1000 and PO3G2700, respectively). TP...
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| Format: | Article |
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MDPI AG
2021-07-01
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| Series: | International Journal of Molecular Sciences |
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| Online Access: | https://www.mdpi.com/1422-0067/22/14/7438 |
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| author | Paulina Kasprzyk Ewa Głowińska Paulina Parcheta-Szwindowska Kamila Rohde Janusz Datta |
| author_facet | Paulina Kasprzyk Ewa Głowińska Paulina Parcheta-Szwindowska Kamila Rohde Janusz Datta |
| author_sort | Paulina Kasprzyk |
| collection | DOAJ |
| description | This study concerns green thermoplastic polyurethanes (TPU) obtained by controlling the chemical structure of flexible segments. Two types of bio-based polyether polyols—poly(trimethylene glycol)s—with average molecular weights ca. 1000 and 2700 Da were used (PO3G1000 and PO3G2700, respectively). TPUs were prepared via a two-step method. Hard segments consisted of 4,4′-diphenylmethane diisocyanates and the bio-based 1,4-butanodiol (used as a chain extender and used to control the [NCO]/[OH] molar ratio). The impacts of the structure of flexible segments, the amount of each type of prepolymer, and the [NCO]/[OH] molar ratio on the chemical structure and selected properties of the TPUs were verified. By regulating the number of flexible segments of a given type, different selected properties of TPU materials were obtained. Thermal analysis confirmed the high thermal stability of the prepared materials and revealed that TPUs based on a higher amount of prepolymer synthesized from PO3G2700 have a tendency for cold crystallization. An increase in the amount of PO3G1000 at the flexible segments caused an increase in the tensile strength and decrease in the elongation at break. Melt flow index results demonstrated that the increase in the amount of prepolymer based on PO3G1000 resulted in TPUs favorable in terms of machining. |
| first_indexed | 2024-03-10T09:37:19Z |
| format | Article |
| id | doaj.art-764c1957e9e741e1b36cec65a500814d |
| institution | Directory Open Access Journal |
| issn | 1661-6596 1422-0067 |
| language | English |
| last_indexed | 2024-03-10T09:37:19Z |
| publishDate | 2021-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | International Journal of Molecular Sciences |
| spelling | doaj.art-764c1957e9e741e1b36cec65a500814d2023-11-22T03:58:35ZengMDPI AGInternational Journal of Molecular Sciences1661-65961422-00672021-07-012214743810.3390/ijms22147438Green TPUs from Prepolymer Mixtures Designed by Controlling the Chemical Structure of Flexible SegmentsPaulina Kasprzyk0Ewa Głowińska1Paulina Parcheta-Szwindowska2Kamila Rohde3Janusz Datta4Department of Polymer Technology, Faculty of Chemistry, Gdansk University of Technology, 11/12 Gabriela Narutowicza Street, 80-233 Gdansk, PolandDepartment of Polymer Technology, Faculty of Chemistry, Gdansk University of Technology, 11/12 Gabriela Narutowicza Street, 80-233 Gdansk, PolandDepartment of Polymer Technology, Faculty of Chemistry, Gdansk University of Technology, 11/12 Gabriela Narutowicza Street, 80-233 Gdansk, PolandDepartment of Polymer Technology, Faculty of Chemistry, Gdansk University of Technology, 11/12 Gabriela Narutowicza Street, 80-233 Gdansk, PolandDepartment of Polymer Technology, Faculty of Chemistry, Gdansk University of Technology, 11/12 Gabriela Narutowicza Street, 80-233 Gdansk, PolandThis study concerns green thermoplastic polyurethanes (TPU) obtained by controlling the chemical structure of flexible segments. Two types of bio-based polyether polyols—poly(trimethylene glycol)s—with average molecular weights ca. 1000 and 2700 Da were used (PO3G1000 and PO3G2700, respectively). TPUs were prepared via a two-step method. Hard segments consisted of 4,4′-diphenylmethane diisocyanates and the bio-based 1,4-butanodiol (used as a chain extender and used to control the [NCO]/[OH] molar ratio). The impacts of the structure of flexible segments, the amount of each type of prepolymer, and the [NCO]/[OH] molar ratio on the chemical structure and selected properties of the TPUs were verified. By regulating the number of flexible segments of a given type, different selected properties of TPU materials were obtained. Thermal analysis confirmed the high thermal stability of the prepared materials and revealed that TPUs based on a higher amount of prepolymer synthesized from PO3G2700 have a tendency for cold crystallization. An increase in the amount of PO3G1000 at the flexible segments caused an increase in the tensile strength and decrease in the elongation at break. Melt flow index results demonstrated that the increase in the amount of prepolymer based on PO3G1000 resulted in TPUs favorable in terms of machining.https://www.mdpi.com/1422-0067/22/14/7438thermoplastic polyurethane elastomersgreen TPUssegmented polyurethanesflexible segmentschemical structure |
| spellingShingle | Paulina Kasprzyk Ewa Głowińska Paulina Parcheta-Szwindowska Kamila Rohde Janusz Datta Green TPUs from Prepolymer Mixtures Designed by Controlling the Chemical Structure of Flexible Segments International Journal of Molecular Sciences thermoplastic polyurethane elastomers green TPUs segmented polyurethanes flexible segments chemical structure |
| title | Green TPUs from Prepolymer Mixtures Designed by Controlling the Chemical Structure of Flexible Segments |
| title_full | Green TPUs from Prepolymer Mixtures Designed by Controlling the Chemical Structure of Flexible Segments |
| title_fullStr | Green TPUs from Prepolymer Mixtures Designed by Controlling the Chemical Structure of Flexible Segments |
| title_full_unstemmed | Green TPUs from Prepolymer Mixtures Designed by Controlling the Chemical Structure of Flexible Segments |
| title_short | Green TPUs from Prepolymer Mixtures Designed by Controlling the Chemical Structure of Flexible Segments |
| title_sort | green tpus from prepolymer mixtures designed by controlling the chemical structure of flexible segments |
| topic | thermoplastic polyurethane elastomers green TPUs segmented polyurethanes flexible segments chemical structure |
| url | https://www.mdpi.com/1422-0067/22/14/7438 |
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