Tailor-made compostable polyurethanes

Hu, Peng; Kumar, Anil; Gharibi, Reza; Agarwal, Seema

doi:10.1039/d1py01236c

Cited by 8 publications

(6 citation statements)

References 40 publications

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“…Dass biologisch abbaubar aber nicht automatisch kompostierbar heißt, erkannten Agarwal und Mitarbeitende und entwickelten ein Polyurethanderivat, das sich bei 45 °C nach drei Monaten vollständig zersetzt. 3) Abbaubarkeit lässt sich auch durch externe Stimuli kontrollieren. Pich, De Laporte und Mitarbeitende stellten beispielsweise mit mikrofluidischen Methoden pHabbaubare supramakromolekulare Mikrogele her.…”

Section: Bioabbaubarkeitunclassified

Trendbericht: Makromolekulare Chemie 2023

Göstl

2023

Nachr Chem

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Section: Bioabbaubarkeitunclassified

Trendbericht: Makromolekulare Chemie 2023

Göstl

2023

Nachr Chem

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“…[1][2][3][4][5][6][7] PUs is generally comprised of a diisocyanate and chain extender as hard segments and polyol parts as soft segments. Then exceptional performance for PU based materials can achieved by effectively regulating segmental structures, chemical components or ratio, molecular polar and weight, and so forth [8][9][10][11][12][13] as well as glass transition temperature or melting temperature, hardness and strength, flexible and elastomeric properties. Recently, a large number of interesting works about PUs elastomers with the linear or crosslink network structures have been reported, relating to the physical properties and the application.…”

Section: Introductionmentioning

confidence: 99%

Cellulose nanocrystal synergistically enhanced polyurethane composites via fish‐net microstructure: Light shielding and mechanical properties

Zhang,

Wang,

Zhang

et al. 2023

J of Applied Polymer Sci

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The synergistically enhanced polyurethane (PU) composites, in which the cellulose nanocrystal (CNC) was incorporated, were in situ polymerized and then the increasingly closer grid network structures for PU/CNC composites were achieved by adjusting chain extenders and adding different low contents of CNC, due to the introduction of different hard segments or the evolution of spherulites. As a result, the onset of the light transmission of PU elastomers and CNC‐filled composites showed an obvious red shift from UV light to visible light region, which meant that all UV light regions could be shielded entirely. Therefore, compared with Rhodamine B in water solution unprotected, the excellent UV‐light shielding was further verified by the inefficient photodegradation of Rhodamine B in water solution protected by PU‐PDA, PU‐BDI or PU‐PDA/CNC films under UV‐light irradiation. Meanwhile, enhanced light shielding behavior for PU‐PDA composites was observed with adding the CNC fillers. Moreover, the significantly enhanced mechanical properties were achieved, more than two or three times at elastic modulus, tensile strength and elongation at break. Finally, synergistically Enhanced mechanical properties in PU composites were found. Therefore, the study was of great significance in the potential light application.

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“…However, polyester‐polyol based PUs are less resistant to hydrolysis when compared to polyethers. This propensity for hydrolysis makes them substantially more favorable for end‐of‐life biodegradation, and we have focused on their development to prepare renewable and biodegradable TPUs 24–27 …”

Section: Introductionmentioning

confidence: 99%

“…This propensity for hydrolysis makes them substantially more favorable for end-of-life biodegradation, and we have focused on their development to prepare renewable and biodegradable TPUs. [24][25][26][27] TPU properties depend on polyol identity and vary from soft elastomers to hard plastics. Poly(propylene succinate) (PPS) is one well-known, biobased polyesterpolyol used for coating and elastomeric TPUs with low melting points.…”

Section: Introductionmentioning

confidence: 99%

Renewable low viscosity polyester‐polyols for biodegradable thermoplastic polyurethanes

Rajput

Hai

Gunawan³

et al. 2022

J of Applied Polymer Sci

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In the transition to renewably sourced, biodegradable polymers, the preparation of low viscosity polyester‐polyols has posed a challenge for renewable polyurethane (PU) development. Low viscosity polyols not only reduce the requirement for high process temperatures but also decrease manufacturing time. In our efforts to incorporate increasing ratios of bio‐based monomers into renewable PUs, we mixed diacids such as even carbon sebacic acid and odd carbon azelaic acid along with a renewable diol. This provided library of 2000 g/mol molecular weight polyester‐polyols, and structures were established by 1H and 13C NMR analysis. The prepared polyester‐polyols offered lower viscosity and enable lower fabrication temperatures to make TPUs, and their structure and material metrics were evaluated. The formation of TPUs is ascertained from FTIR and NMR analysis. The final TPUs displayed good physical and mechanical properties. These TPUs exhibited Tg in the range of −56.5 to −39.7°C, corresponding to TPU soft block structure, and Tm between 98.3 and 105.1°C originating from the hard segment. Prepared TPUs exhibit excellent biodegradation under compost environmental conditions. These TPUs showed up to 57% decrease in molecular weight by GPC analysis after 9 weeks of biodegradation, and respirometer analysis displayed up to 97% biodegradation over 120 days.

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Tailor-made compostable polyurethanes

Abstract: The basic design principle for making polyurethanes recyclable and their waste management is highly relevant in light of increasing concerns about plastic pollution and the occurrence of microplastics in the...

Cited by 8 publications

References 40 publications

Trendbericht: Makromolekulare Chemie 2023

Trendbericht: Makromolekulare Chemie 2023

Cellulose nanocrystal synergistically enhanced polyurethane composites via fish‐net microstructure: Light shielding and mechanical properties

Renewable low viscosity polyester‐polyols for biodegradable thermoplastic polyurethanes

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