Single‐phase product obtained via crude glycerine depolymerisation of polyurethane elastomer: structure characterisation and rheological behaviour

Kopczyńska, Patrycja; Datta, Janusz

doi:10.1002/pi.5128

Cited by 36 publications

(27 citation statements)

References 28 publications

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“…Also, to minimize the reduction of luminous efficacy, the selected polymers should be transparent, such as poly(vinyl chloride), poly(methyl methacrylate), polycarbonate and polyurethane (PU). Among these polymers, PU has found extensive commercial and industrial applications due to its virtue of easiness of preparation and appealing mechanical properties . Of late, some work has been published relating to luminescent PU; however, to the best of our knowledge, sunlight‐activated long persistent luminescent polyurethane (LPLPU) has been scarcely reported to date.…”

Section: Introductionmentioning

confidence: 99%

Sunlight‐activated long persistent luminescent polyurethane incorporated with amino‐functionalized SrAl₂O₄:Eu²⁺,Dy³⁺ phosphor

Tian

Wen

Fan

et al. 2016

Polymer International

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An amino‐terminated long persistent luminescent phosphor (Amino‐SrAl2O4:Eu2+,Dy3+) was prepared based on inorganic SrAl2O4:Eu2+,Dy3+ phosphor, chemically modified with 3‐aminopropyltriethoxysilane (KH550). Fourier transform infrared and X‐ray photoelectron spectral, thermogravimetric and scanning electron microscopic measurements confirmed the successful synthesis of Amino‐SrAl2O4:Eu2+,Dy3+. Then this amino‐functionalized phosphor was introduced into polyurethane (PU) through urea linkages, and the effects of the chemical combination of Amino‐SrAl2O4:Eu2+,Dy3+ and PU on the morphology, structure, storage stability, and mechanical, thermal and luminescent properties of the resultant long persistent luminescent polyurethane (LPLPU) were investigated. Compared with SrAl2O4:Eu2+,Dy3+/PU composites prepared by physical blending, the LPLPU shows better mechanical properties and storage stability due to the good compatibility of Amino‐SrAl2O4:Eu2+,Dy3+ with PU. More residues and higher initial decomposition temperature are observed because the interaction of the amino‐phosphor and PU delays the degradation. Study of the luminescent effect reveals that the LPLPU shows more than 10 h afterglow after cessation of the excitation light, and the brightness of green light in darkness is basically the same as that of LPLPU and SrAl2O4:Eu2+,Dy3+/PU. © 2016 Society of Chemical Industry

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Section: Introductionmentioning

confidence: 99%

Sunlight‐activated long persistent luminescent polyurethane incorporated with amino‐functionalized SrAl₂O₄:Eu²⁺,Dy³⁺ phosphor

Tian

Wen

Fan

et al. 2016

Polymer International

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“…Kopczyńska and Datta [31] presented a method of polyurethane thermo-chemical recycling, glycerolysis by means of crude glycerol. Authors used the crude glycerol as a decomposing agent for PU recycling.…”

Section: Recent Developments In Polyurethane Foams Containing Low-cosmentioning

confidence: 99%

Recent Developments in Polyurethane Foams Containing Low-Cost and Pro-Ecological Modifiers

Kosmela¹,

Zedler²,

Formela³

et al. 2016

ChChT

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Abstract. Diversity of the polyurethane (PU) foams applications cause that investigation of the relationships between their structure and properties is currently very popular topic among the many research institutions and companies. At the turn of the last years many scientific papers about PU foams and their composites were published. The one of the main research trends in this field is related to the reduction of production costs of PU foams. This aim can be successfully achieved through the incorporation of raw materials of natural origin or the utilization of waste materials. This work reviews the progress and recent developments in area of PU foams containing low-cost and pro-ecological modifiers, such as crude glycerol, liquefied biomass, ground tire rubber, etc.

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“…Basically, a coating is mainly composed of film former, pigment, additives and dispersion medium. As regards film former, recently waterborne polyurethane (WPU) has become more and more popular because of its outstanding properties, such as non‐toxicity, non‐flammability, excellent flexibility and adhesion, inconstant hardness and so on . Nowadays, WPU is widely used in leather/synthetic leather finishing, textile laminating, automobiles and wood coatings .…”

Section: Introductionmentioning

confidence: 99%

“…As regards film former, recently waterborne polyurethane (WPU) has become more and more popular because of its outstanding properties, such as non-toxicity, non-flammability, excellent flexibility and adhesion, inconstant hardness and so on. [3][4][5][6] Nowadays, WPU is widely used in leather/synthetic leather finishing, textile laminating, automobiles and wood coatings. [7][8][9][10] With the improvement of people's lives as well as the transformation of their aesthetic concept, types of low-gloss coatings concurrently possessing excellent transmittance are enjoyed by people.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of self‐matting waterborne polyurethane coatings with excellent transmittance

Sun

Fan

Chen

et al. 2017

Polymer International

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The effect of structural factors, including the type of diisocyanates and glycols, degree of crosslinking, hard-segment content, crystallinity and hydrophilic group content, on optical properties of waterborne polyurethane (WPU) was investigated. Based on the relationship between structure and properties, a series of self-matting WPUs with excellent transmittance were synthesized. Results demonstrated that refractive index of constituent groups was an important factor to influence the optical properties of coatings. For multiphase polyurethane, aromatic ring, ester bond, -NH-COO-and urea groups with high refractive index could decrease the matting effect and transmittance. Higher hard-segment content resulting in an increase of the number of -NH-COO-or urea bonds also decreased the matting effect and transmittance. The aggregation structure of WPU was another factor to influence the optical properties of coatings. Crystalline soft and hard segment domains could decrease the transmittance and matting effect, whilst non-crystalline segments, pendent groups and crosslinking destroyed the regularity or crystallinity of macromolecules, behaving as an auxiliary function to improve the transmittance. The particle size of WPU was of great importance for the matting effect. Smaller particle size (<5.0 m) would endow the coating with a smoother surface and higher reflected light ratio, and thus the expected matting effect was hard to be achieved. A larger particle size could improve the matting effect but impart to the coating a coarse surface and hand-feel. When the 2,2-bis(hydroxymethyl)propionic acid content was 1.6 wt%, spherical particles with a size distribution of 7-8 m were aggregated on the coating surface, giving the coating an excellent matting effect and hand-feel.

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Single‐phase product obtained via crude glycerine depolymerisation of polyurethane elastomer: structure characterisation and rheological behaviour

Abstract: Crude glycerine was used as a decomposing agent in polyurethane recycling. The resulting semi‐products are valuable and can be used in polyurethane synthesis as replacement of polyols.

Cited by 36 publications

References 28 publications

Sunlight‐activated long persistent luminescent polyurethane incorporated with amino‐functionalized SrAl₂O₄:Eu²⁺,Dy³⁺ phosphor

Sunlight‐activated long persistent luminescent polyurethane incorporated with amino‐functionalized SrAl₂O₄:Eu²⁺,Dy³⁺ phosphor

Recent Developments in Polyurethane Foams Containing Low-Cost and Pro-Ecological Modifiers

Synthesis of self‐matting waterborne polyurethane coatings with excellent transmittance

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Single‐phase product obtained via crude glycerine depolymerisation of polyurethane elastomer: structure characterisation and rheological behaviour

Abstract: Crude glycerine was used as a decomposing agent in polyurethane recycling. The resulting semi‐products are valuable and can be used in polyurethane synthesis as replacement of polyols.

Cited by 36 publications

References 28 publications

Sunlight‐activated long persistent luminescent polyurethane incorporated with amino‐functionalized SrAl2O4:Eu2+,Dy3+ phosphor

Sunlight‐activated long persistent luminescent polyurethane incorporated with amino‐functionalized SrAl2O4:Eu2+,Dy3+ phosphor

Recent Developments in Polyurethane Foams Containing Low-Cost and Pro-Ecological Modifiers

Synthesis of self‐matting waterborne polyurethane coatings with excellent transmittance

Contact Info

Product

Resources

About

Sunlight‐activated long persistent luminescent polyurethane incorporated with amino‐functionalized SrAl₂O₄:Eu²⁺,Dy³⁺ phosphor

Sunlight‐activated long persistent luminescent polyurethane incorporated with amino‐functionalized SrAl₂O₄:Eu²⁺,Dy³⁺ phosphor