Basalt-Fiber-Reinforced Polyvinyl Acetate Resin: A Coating for Ductile Plywood Panels

Kramár, Samuel; Trcala, Miroslav; Chitbanyong, Korawit; Král, Pavel; Puangsin, Buapan

doi:10.3390/ma13010049

Cited by 14 publications

(7 citation statements)

References 37 publications

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“…To assess whether covalent versions of common additives in polyethylenes can be installed on the oxygens of hydroxy- polyethylene 3 , we first evaluated methods to functionalize the alcohol groups in a manner that would render the polyethylene compatible with polar polymers. Polymers containing esters are prevalent in adhesives, coatings, , and membranes. , These esters could be designed to behave as dyes, plasticizers, or stabilizers for specific applications. Furthermore, covalently bound additives could prevent the leaching of additives from polyethylene …”

Section: Resultsmentioning

confidence: 99%

Chemical Modification of Oxidized Polyethylene Enables Access to Functional Polyethylenes with Greater Reuse

Shi,

Ciccia,

Pal

et al. 2023

J. Am. Chem. Soc.

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Polyethylene is a commodity material that is widely used because of its low cost and valuable properties. However, the lack of functional groups in polyethylene limits its use in applications that include adhesives, gas barriers, and plastic blends. The inertness of polyethylene makes it difficult to install groups that would enhance its properties and enable programmed chemical decomposition. To overcome these deficiencies, the installation of pendent functional groups that imbue polyethylene with enhanced properties is an attractive strategy to overcome its inherent limitations. Here, we describe strategies to derivatize oxidized polyethylene that contains both ketones and alcohols to monofunctional variants with bulk properties superior to those of unmodified polyethylene. Iridium-catalyzed transfer dehydrogenation with acetone furnished polyethylenes with only ketones, and ruthenium-catalyzed hydrogenation with hydrogen furnished polyethylenes with only alcohols. We demonstrate that the ratio of these functional groups can be controlled by reduction with stoichiometric hydride-containing reagents. The ketones and alcohols serve as sites to introduce esters and oximes onto the polymer, thereby improving surface and bulk properties over those of polyethylene. These esters and oximes were removed by hydrolysis to regenerate the original oxygenated polyethylenes, showing how functionalization can lead to materials with circularity. Waste polyethylenes were equally amenable to oxidative functionalization and derivatization of the oxidized material, showing that this low- or negative-value feedstock can be used to prepare materials of higher value. Finally, the derivatized polymers with distinct solubilities were separated from mechanically mixed plastic blends by selective dissolution, demonstrating that functionalization can lead to novel approaches for distinguishing and separating polymers from a mixture.

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Section: Resultsmentioning

confidence: 99%

Chemical Modification of Oxidized Polyethylene Enables Access to Functional Polyethylenes with Greater Reuse

Shi,

Ciccia,

Pal

et al. 2023

J. Am. Chem. Soc.

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“…Research on reinforcing wood-based products with primarily synthetic fiber-based fabrics to enhance mechanical properties date back to the 1960s [ 16 ]. The latest research regarding natural fiber reinforcement of plywood focuses strongly on the use of mineral-based basalt fiber [ 17 , 18 , 19 , 20 ]. Whereas the application of the fiber in wood-based composites is normally located at the surface due to the improvement for tensile strength compared to native wood under load barring induced static bending [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Cellulose and Flax Fiber Unidirectional Reinforced Plywood

et al. 2022

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This research presents the influence of two different cellulose (hydrophobic pretreated/non-pretreated) and one flax-fiber unidirectional nonwoven low areal weight fiber reinforcements on the mechanical properties of urea-formaldehyde bonded five layered beech (Fagus sylvatica L.) plywood as an alternative to commonly used synthetic fiber reinforcements. The results display divergent trends regarding the improvement of the mechanical properties—modulus of elasticity, modulus of rupture, tensile strength, shear strength, and screw withdrawal resistance. The non-treated cellulose and flax reinforcing nonwoven fabrics revealed similar mechanical behaviors. The hydrophobic pretreatment of cellulose nonwovens improved the performance of plywood regarding tensile strength (10–11%), shear strength (7–16%), screw withdrawal resistance (11–15%), and modulus of rupture (0–2%), but lowered modulus of elasticity (2–3%) compared to the reference.

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“…Additionally, sources of basalt are abundant [19]. Nowadays, basalt fibers are of interest for the reinforcement of wood-plastic composites [20,21] and the reinforcement of timber beams [22,23]. They have also been widely used for concrete reinforcement applications [24] The fiber-reinforced plywood composition has several combination possibilities.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Prestressing and Temperature on Tensile Strength of Basalt Fiber-Reinforced Plywood

et al. 2021

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The reinforcement of plywood is demonstrated by laminating pretensioned basalt fibers between veneer sheets, to fabricate so-called prestressed plywood. Belt type basalt fibers bearing a specific adhesion promoting silane sizing were aligned between veneer sheets with 20 mm spacing and were pretensioned at 150 N. Three-layer plywood samples were prepared and tested for tensile strength at room temperature and at 150 °C. The room temperature tensile tests revealed a 35% increase in tensile strength for prestressed plywood compared to that of the conventional specimen. The reinforcement effect deteriorated at 150 °C but was restored upon cooling to room temperature. The deterioration is attributed to the weakening of bonding between the basalt fibers and phenolic resin matrix at elevated temperatures due to the softening of the resin.

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Basalt-Fiber-Reinforced Polyvinyl Acetate Resin: A Coating for Ductile Plywood Panels

Cited by 14 publications

References 37 publications

Chemical Modification of Oxidized Polyethylene Enables Access to Functional Polyethylenes with Greater Reuse

Chemical Modification of Oxidized Polyethylene Enables Access to Functional Polyethylenes with Greater Reuse

Mechanical Properties of Cellulose and Flax Fiber Unidirectional Reinforced Plywood

The Effect of Prestressing and Temperature on Tensile Strength of Basalt Fiber-Reinforced Plywood

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