CO2-based poly (propylene carbonate) with various carbonate linkage content for reactive hot-melt polyurethane adhesives

Liu, Zenghe; Huang, Ji-Qing; Chen, Shuo; Huang, Yuancan; Ding, Fang; Guo, Weiqiang; Lei, Dong; Yang, Lei; Qing, Feng‐Ling; You, Zhengwei

doi:10.1016/j.ijadhadh.2019.102456

Cited by 33 publications

(16 citation statements)

References 24 publications

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“…Comparable shear strengths (2.84 MPa with high rate of substrate failure were reported by Tenorio-Alfonso and co-workers [ 22 ] for the adhesives derived from cellulose acetate, 1,6-hexamethylene diisocyanate and castor oil with renewable content as high as 70%. Similar results were achieved for hot melt reactive polyurethanes derived from CO 2 -based poly(propylene carbonate): Lap-shear tests performed after 7-day curing on aluminum and steel revealed maximum strengths, respectively, 5.5 MPa and 4.7 MPa [ 45 ] and 1.5–6.0 MPa for plastics [ 46 ]. PUR adhesives based on biopolyols from liquefied biomass were proved to exhibit comparable performance as the shear strengths ranged between 5.8 and 11.0 MPa [ 21 ].…”

Section: Resultssupporting

confidence: 67%

The Effect of Silica-Filler on Polyurethane Adhesives Based on Renewable Resource for Wood Bonding

2020

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The aim of the study was to evaluate the applicability and performance of polyglycerol- and sucrose-based polyols as components of a simplified formulation of polyurethane adhesives. Colloidal silica was used as a viscosity control and reinforcing agent. The adhesives were examined in terms of reactivity, thermal stability, viscosity, work of adhesion, wetting, surface energy, and bonding strength on wooden substrates. Silica was found to increase gelling time, but markedly improved bonding strength and adhesion with substrates. Bonded solid beech wood samples prepared at 80, 110, and 130 °C showed shear strengths between 7.1 MPa and 9.9 MPa with 100% wood failure. The renewable resource-based polyols were demonstrated to be useful in formulation of polyurethane adhesives for furniture industry—especially with silica as a filler.

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Section: Resultssupporting

confidence: 67%

The Effect of Silica-Filler on Polyurethane Adhesives Based on Renewable Resource for Wood Bonding

2020

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“…Samples with different degrees of saponification were obtained by controlling the concentration of sodium hydroxide and the reaction time in the saponification of PVAc. DP was determined by measuring the intrinsic viscosity of the fully acetylated specimen in benzene, and the degree of saponification was determined by 1 HNMR.…”

Section: Methodsmentioning

confidence: 99%

“…Hot melt adhesives (HMAs) widely used in various fields such as bookbinding, wood processing, packaging, cars are composed of a base polymer, a tackifier, waxes, and antioxidants 1–3 . EVA, a copolymer of ethylene and vinyl acetate (VAc), is most commonly used as the base polymer for HMAs.…”

Section: Introductionmentioning

confidence: 99%

Biodegradable hot melt adhesive based on partially saponified polyvinyl acetate/cellulose diacetate blend

Kim

Pak³

et al. 2021

J of Applied Polymer Sci

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Recycling the polymer material from the waste has a great advantage in reducing the cost of the biodegradable hot melt adhesive and solving environmental problems. Cellulose diacetate obtained from the acid hydrolysis of discarded cellulose triacetate‐based cinematographic films was blended with low molecular weight partially saponified polyvinyl acetate. The degree of substitution of cellulose diacetate and the degree of saponification of partially saponified polyvinyl acetate to obtain the binary blends having excellent compatibility were determined by FTIR and DSC. TGA showed that these blends have sufficient thermal stability for hot melt adhesive applications. The viscoelastic properties of the blends were evaluated by DMA and melt viscosity. The shear strength and the biodegradability of the final hot melt adhesive were examined according to the amount of cellulose diacetate in the blends. The results indicate that adding 20% of cellulose diacetate can reduce the cost of partially saponified polyvinyl acetate ‐based hot melt adhesive while improving the adhesive strength.

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“…Recently, adhesives prepared with CO 2 -derived poly(propylene carbonate) have been formulated. This could also contribute to climate change mitigation. − Preferentially, the resulting green formulations should be devoid of organic volatile solvents, which constitute an environmental hazard. Noteworthy in this context is that vegetable oils not only provide an integrative reactive component of bioadhesive formulations but also constitute the fluid medium for the polymerization processes that lead to the adhesive polymer network.…”

Section: Introductionmentioning

confidence: 99%

“…Polyurethanes that are derived from renewable resources exhibit suitable properties for using them as adhesives and coatings for wood and chipboard, plastic, or metal surfaces. − However, their functional performance has still ample room for improvement to turn them into serious alternatives to their purely synthetic counterparts. One of the most notorious technological aspects of successful adhesive formulations is the curing process.…”

Section: Introductionmentioning

confidence: 99%

Toward UV-Triggered Curing of Solvent-Free Polyurethane Adhesives Based on Castor Oil

Borrero-López

Guzmán

González‐Delgado

et al. 2021

ACS Sustainable Chem. Eng.

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An o-nitrobenzyl-protected precursor was used as a phototrigger for the release of the diamine cadaverine in polyurethane adhesives based on castor oil as a renewable source of polyol and organic diisocyanates. This resulted in formulations with suitably controlled curing by photoactivation. This material shows faster curing when UV light is applied as compared to curing in the absence of irradiation, which was in situ monitored by rheological measurements. In addition, the adhesion performance is superior, reaching lap shear strength values of up to 4600 kPa, which is unprecedented for bio-based adhesives. On one hand, the in-depth chemical characterization with FTIR spectroscopy revealed that the slow release of cadaverine yields a well-balanced urethane/urea composition with direct impact on adhesion properties. The photocured bioadhesive was shown to bond a variety of surfaces, such as polyethylene or even wood. On the other hand, the direct one-time addition of cadaverine yields a material with approximately the same viscoelastic properties, which were achieved almost immediately as a consequence of the favored fast formation of urea bonds in detriment of urethanes, however, lacking adhesion properties.

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CO2-based poly (propylene carbonate) with various carbonate linkage content for reactive hot-melt polyurethane adhesives

Cited by 33 publications

References 24 publications

The Effect of Silica-Filler on Polyurethane Adhesives Based on Renewable Resource for Wood Bonding

The Effect of Silica-Filler on Polyurethane Adhesives Based on Renewable Resource for Wood Bonding

Biodegradable hot melt adhesive based on partially saponified polyvinyl acetate/cellulose diacetate blend

Toward UV-Triggered Curing of Solvent-Free Polyurethane Adhesives Based on Castor Oil

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