Biobased, Reprocessable Non-isocyanate Polythiourethane Networks with Thionourethane and Disulfide Cross-Links: Comparison with Polyhydroxyurethane Network Analogues

Macromolecules, Год журнала: 2023, Номер 56(10), С. 3687 - 3702

Опубликована: Май 9, 2023

Here, we report the first study of reprocessability and properties non-isocyanate polythiourethane (NIPTU) networks in which cross-links are two types, thionourethane disulfide, latter obtained by auto-oxidation pendant thiol groups. Our NIPTU biowaste based because starting materials can be derived from cashew nutshells or rice husks. We use dynamic mechanical analysis, tensile testing, water sorption studies to compare our with structurally analogous polyhydroxyurethane (PHU) networks, polyurethanes (PUs). With significant advantages reactivity, properties, cross-link density, favorable alternatives PHU networks. biobased also exhibit better resistance, a factor ∼3 reductions relative their analogues. Due covalent cross-links, NIPTUs show excellent complete recovery density after multiple reprocessing steps as well potential self-healing polymers. Although creep viscosity activation energies differ 2, both resistance up 80–100 °C. Thus, elevated-temperature many applications, e.g., water-resistant coatings, favored substitutes for PU

Язык: Английский

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Bio-based non-isocyanate polyurethane with closed-loop recyclability and its potential application

Chemical Engineering Journal, Год журнала: 2023, Номер 475, С. 146398 - 146398

Опубликована: Окт. 2, 2023

Язык: Английский

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Innovative design and green synthesis of bio-based non-isocyanate polyurethanes: Efficient combination of cardanol and carbon dioxide with high fire safety and robust adhesion

Chemical Engineering Journal, Год журнала: 2024, Номер 482, С. 148846 - 148846

Опубликована: Янв. 18, 2024

Язык: Английский

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Covalent adaptive networks with repairable, reprocessable, reconfigurable, recyclable, and re-adhesive (5R) performance via dynamic isocyanate chemistry

Polymer Chemistry, Год журнала: 2023, Номер 14(38), С. 4381 - 4406

Опубликована: Янв. 1, 2023

Recent developments and challenges in covalent adaptive networks with repairable, reprocessable, reconfigurable, recyclable, re-adhesive (5R) performance via dynamic isocyanate chemistry are summarized this review article.

Язык: Английский

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Biobased, Biodegradable, and Water-Soluble Amine-Functionalized Non-Isocyanate Polyurethanes for Potential Home Care Application

ACS Applied Polymer Materials, Год журнала: 2023, Номер 5(7), С. 5503 - 5513

Опубликована: Июнь 15, 2023

Non-isocyanate polyurethanes (NIPUs) synthesized using bis–/poly(cyclic carbonate) and di-/polyamine monomers provide a safer alternative to conventional (PUs) produced from highly toxic di-/polyisocyanates di-/polyols. Water-based NIPUs could potentially substitute waterborne PUs, particularly, in applications where the presence of minute amounts isocyanate impurity final PU product might cause severe consequences. Nevertheless, direct syntheses water-soluble are uncommon. Herein, we report single-step synthesis bio-derived linear amine-NIPUs by polyaddition reaction succinic bis(cyclic (SuBCC) with different commercial polyamines. These contain secondary (−NH−) or tertiary (−NR−) amine groups their main chain imparting good water solubility/dispersibility. Consequently, were evaluated for function as anti-soil/dirt redepositioning agents, one key ingredients present laundry detergents used home care applications. It is demonstrated that this study effective retaining >90% whiteness (L*) cotton polyester cloths after model dirt deposition wash cycle. Remarkably, these polymers noncytotoxic when tested on human keratinocyte HaCaT cells non-skin irritants vitro skin irritation assay reconstructed epidermis, which emphasizes suitability further. The also found degrade slowly (65% 32 days) under hydrolytic conditions similar seawater (pH 8.4 at 23 °C) biodegradable activated sludge (up 66% 28 days), determined Zahn Wellens OECD-302-B assay. This work may pave way toward development utilization green, sustainable, other applications, replacing current toxic, nondegradable, petroleum-based ingredients.

Язык: Английский

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Recent Advances in the Synthesis and Polymerization of New CO₂‐Based Cyclic^†

Chinese Journal of Chemistry, Год журнала: 2023, Номер 42(4), С. 430 - 443

Опубликована: Окт. 10, 2023

Comprehensive Summary Carbon dioxide can be converted into functional heterocycles known as cyclic carbonates, whose recent reactivity has been expanded towards the formation of tailor‐made engineering polymers. This minireview gives an overview most topical developments in this area with a special focus on synthetic methods employed to prepare these CO 2 based synthons. In addition, their application potential polymer science using variety polymerization techniques is discussed that have common ring‐opening carbonate monomers. Future perspectives are provided provide impetus for scientific communities aligning research use sustainable processes polymers from recyclable carbon sources such .

Язык: Английский

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High strength and rapid self-healing daidzein-based polyhydroxyurethanes for high temperature-resistant adhesives

Polymer Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Polyhydroxyurethanes (PHUs) are considered a sustainable and safer alternative to traditional toxic isocyanate-based polyurethanes (PUs).

Язык: Английский

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Polyphenol lignin derived non-isocyanate polyurethane with mechanically robust and photothermal conversion performances

International Journal of Biological Macromolecules, Год журнала: 2025, Номер unknown, С. 143259 - 143259

Опубликована: Апрель 1, 2025

Язык: Английский

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Design of Plurifunctional Cyclocarbonates and their Use as Precursors of Poly(hydroxyurethane) Thermosets: A Review

Macromolecular Chemistry and Physics, Год журнала: 2023, Номер 224(23)

Опубликована: Окт. 18, 2023

Abstract Polyhydroxyurethanes (PHUs) are promising polymers to replace polyurethanes (PUs), classically obtained by the isocyanate‐alcohol route. Various application fields of PUs, for example, foams or coatings, require use thermosetting polymers. Hence, a great deal effort is devoted development PHU thermosets in recent literature. This review highlights different strategies developed through years synthesize plurifunctional cyclic carbonates, also called poly(cyclic carbonate)s, and whose functionality ≥3 prerequisite synthesis PHUs. A special emphasize accorded safe eco‐friendly synthetic approaches (e.g., phosgene‐free, renewable reactants). In addition, curing implemented overcome low reactivity monomers limitations related transitions growing networks (i.e., viscosification, gelation, vitrification) described. end, PHUs under mild thermal conditions, down room temperature, Such conditions uncommon paving way much anticipated applications such as adhesives, 3D‐printing.

Язык: Английский

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Reprocessable and chemically recyclable poly(acylhydrazone–imine) covalent adaptable networks with enhanced mechanical strength and creep resistance

Polymer Chemistry, Год журнала: 2023, Номер 15(3), С. 172 - 180

Опубликована: Дек. 11, 2023

A room temperature chemically recyclable poly(acylhydrazone–imine) covalent adaptable network with high mechanical strength and creep resistance was constructed by designing synergetic hydrogen bonds acylhydrazone in a single polymer network.

Язык: Английский

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