Green PU resin from an accelerated Non-isocyanate process with microwave radiation

Hwang, Jing-Zhong; Chen, Chieh-Ling; Huang, Chi‐Yuan; Yeh, Jen‐Taut; Chen, Kan-Nan

doi:10.1007/s10965-013-0195-4

Cited by 11 publications

(12 citation statements)

References 51 publications

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“…Up to now, it has been widely used in daily life, industrial and agricultural production, medicine and other fields. [46,47] As one of the fastest growing thermoplastic elastomers, thermoplastic polyurethane (TPU) is the first elastomer that can be thermoplastic processed. TPU is a block copolymer composed of diisocyanate, polyether (or polyester) and other oligomeric diols, and small molecule chain extender.…”

Section: Polyurethanementioning

confidence: 99%

“…However, the incomplete nature of the chemical reaction results in the synthesis of polyurethane materials with residual isocyanate, which is highly toxic and hinders the development of polyurethane materials in the field of bioengineering. [47,60] Based on this, researchers have optimized the synthesis process of conventional polyurethanes to achieve isocyanate-free polyurethanes. Pyo et al [98] reported a method for the fabrication of isocyanate-free polyurethanes based on methacrylate cyclic carbonates and biogenic amines.…”

Section: Biomedical Applicationsmentioning

confidence: 99%

“…Up to now, it has been widely used in daily life, industrial and agricultural production, medicine and other fields. [ 46,47 ]…”

Section: Polyurethane and Photosensitive Polyurethanementioning

confidence: 99%

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Progress in Photocurable 3D Printing of Photosensitive Polyurethane: A Review

Fei

Rong

Zhu

et al. 2023

Macromol. Rapid Commun.

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In recent years, as a class of advanced additive manufacturing (AM) technology, photocurable 3D printing has gained increasing attention. Based on its outstanding printing efficiency and molding accuracy, it is employed in various fields, such as industrial manufacturing, biomedical, soft robotics, electronic sensors. Photocurable 3D printing is a molding technology based on the principle of area‐selective curing of photopolymerization reaction. At present, the main printing material suitable for this technology is the photosensitive resin, a composite mixture consisting of a photosensitive prepolymer, reactive monomer, photoinitiator, and other additives. As the technique research deepens and its application gets more developed, the design of printing materials suitable for different applications is becoming the hotspot. Specifically, these materials not only can be photocured but also have excellent properties, such as elasticity, tear resistance, fatigue resistance. Photosensitive polyurethanes can endow photocured resin with desirable performance due to their unique molecular structure including the inherent alternating soft and hard segments, and microphase separation. For this reason, this review summarizes and comments on the research and application progress of photocurable 3D printing of photosensitive polyurethanes, analyzing the advantages and shortcomings of this technology, also offering an outlook on this rapid development direction.

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Section: Polyurethanementioning

confidence: 99%

Section: Biomedical Applicationsmentioning

confidence: 99%

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Progress in Photocurable 3D Printing of Photosensitive Polyurethane: A Review

Fei

Rong

Zhu

et al. 2023

Macromol. Rapid Commun.

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“…A typical and one of the most extensively investigated bis(cyclic carbonate) is a derivative of bisphenol A bearing two glycerol carbonate units attached to the phenol OH groups via methylene groups (Scheme ) …”

Section: Synthesis Of Nipu By Step‐growth Polyadditionmentioning

confidence: 99%

“…Such difunctional monomer is easily available from 2,2‐bis(4‐glycidyloxyphenyl)propane via a CO 2 addition. The procedure reported by Hwang et al used LiCl (5 mol%) as a catalyst and ethyl lactate as a solvent . The reaction proceeded for 24 hr at 100°C under atmospheric pressure.…”

Section: Synthesis Of Nipu By Step‐growth Polyadditionmentioning

confidence: 99%

Non‐isocyanate polyurethanes: synthesis, properties, and applications

Rokicki

Parzuchowski

Mazurek

2015

Polymers for Advanced Techs

338

233

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Conventional polyurethanes are typically obtained from polyisocyanates, polyols, and chain extenders. The main starting materials-isocyanates used in this process-raise severe health hazard concerns. Therefore, there is a growing demand for environment-friendly processes and products. This review article summarizes progress that has been made in recent years in the development of alternative methods of polyurethane synthesis. In most of them, carbon dioxide is applied as a sustainable feedstock for polyurethane production directly or indirectly. The resulting nonisocyanate polyurethanes are characterized by a solvent-free synthesis, resistance to chemical degradation, 20% more wear resistance than conventional polyurethane, and can be applied on wet substrates and cured under cold conditions. Three general polymer synthetic methods, step-growth polyaddition, polycondensation, and ring-opening polymerization, are presented in the review. Much attention is given to the most popular and having potential industrial importance method of obtaining non-isocyanate polyurethanes, poly(hydroxy-urethane)s, based upon multicyclic carbonates and aliphatic amines. It is evident from the present review that considerable effort has been made during the last years to develop environmentally friendly methods of obtaining polyurethanes, especially those with the use of carbon dioxide or simple esters of carbonic acid. Scheme 1. [n,m]-Polyurethane synthesis from alkylene bis(chloroformate)s and diamines. Scheme 2. Synthesis of NIPU in the reaction of alkylene bis(phenyl carbonate) with diamine. Scheme 3. Synthesis of [n]-polyurethane from aminoalkyl chloroformate.Scheme 4. Synthesis of [6]-polyurethane from 6-amino-1-hexanol. Scheme 5. Synthesis of allylcarbamate monomer and poly(thioether-urethane).708 Scheme 8. Synthesis of NIPU via AB-type self-polycondensation.Scheme 7. Multistep synthesis of isosorbide-based polyurethane (polycondensation mode). Scheme 6. Multistep synthesis of isosorbide-based polyurethane (polyaddition mode).

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Synthesis and characterization of partially hydrolyzed polyacrylamide nanocomposite weak gels with high molecular weights

Chen

et al. 2015

J of Applied Polymer Sci

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High-molecular-weight partially hydrolyzed polyacrylamide nanocomposite (HPAMNC) weak gels were synthesized and evaluated for their flooding behaviors in oil-recovery applications. The structure, morphology, and properties of the obtained HPAMNC samples and their weak gels were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). XRD patterns clearly proved the exfoliation of the montmorillonite (MMT) layers in the polymer matrix; this was consistent with TEM analysis. The morphology of the HPAMNC was proven to be in a cross-wire aggregated form by SEM analysis. The viscosity-average molecular mass of the obtained HPAMNC was approximately 8.51 3 10 6 under the optimized MMT load at 1.0 wt %. The flooding experiments showed that the oil-recovery rates in sand pack tubes with low and high permeability were enhanced by approximately 35.1 and 46.2%, respectively.

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Green PU resin from an accelerated Non-isocyanate process with microwave radiation

Cited by 11 publications

References 51 publications

Progress in Photocurable 3D Printing of Photosensitive Polyurethane: A Review

Progress in Photocurable 3D Printing of Photosensitive Polyurethane: A Review

Non‐isocyanate polyurethanes: synthesis, properties, and applications

Synthesis and characterization of partially hydrolyzed polyacrylamide nanocomposite weak gels with high molecular weights

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