Effect of polyol on physico-mechanical properties of polyurea film

Negim, El‐Sayed; Bekbayeva, Lyazzat; Omurbekova, Kymbat; Ibrahim, Mohamad Nasir Mohamad

doi:10.1063/1.5117111

Cited by 5 publications

(5 citation statements)

References 12 publications

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“…In the pure PUU reference sample, failure occurred at 17.13 MPa accompanied by an elongation at break of 1184%. Tensile strength of the PUU and percentage elongation at break was influenced by the cross‐linking of hydrogen boding between hard urea segments and soft PTMG segment in polymer 79 . However, when blended samples were tested, their maximum values were observed (as presented in Table 4), although the mechanical strength decreased, in line with the predicted reduction in tensile strength compared to the pure PUU.…”

Section: Resultsmentioning

confidence: 52%

“…Tensile strength of the PUU and percentage elongation at break was influenced by the cross-linking of hydrogen boding between hard urea segments and soft PTMG segment in polymer. 79 However, when blended samples were tested, their maximum values were observed (as presented in Table 4), although the mechanical S3) these are excellent anticorrosion coating systems that have developed so far and can be positioned as promising candidates for various anticorrosion applications.…”

Section: Mechanical Studiesmentioning

confidence: 99%

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Electroactive additives into polyurethanes for high corrosion resistance coatings for mild steel

Borah,

Palanisamy

et al. 2024

Polymers for Advanced Techs

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There is a demand for innovative coatings such as polyurethane (PU) in industrial and commercial sectors to effectively combat corrosion on mild steel substrates. In this work, novel redox‐active polyurea (PUr) additives such as PUr‐diamine capped trimer (DCTA) and PUr‐diamine‐capped tetraaniline (DCTAni), derived from DCTA and DCTAni, were synthesized to enhance the anticorrosion properties of PU coatings. These are characterized using 1H nuclear magnetic resonance spectroscopy, Fourier transformed infrared, and high‐resolution mass spectrometry technical methods. These additives (2, 5, and 10 wt%) were dispersed in a polyurethane‐urea (PUU) matrix, which was synthesized from PTMG‐2000, and IPDI with dihydrazide adipate as a chain extender. The electroactivity of the coatings were evaluated using cyclic voltammetry (CV) and ultraviolet–visible spectroscopy. Furthermore, anticorrosion performance was assessed through electrochemical impedance spectroscopy and Tafel potentiodynamic polarization measurements. The optimal corrosion protection was achieved with increasing weight percent (wt%) of additive in PUU, showing a trend of 10% > 5% > 2%. Coatings reported maximum polarization resistance (Rp) of 122.15 MΩ, with corrosion rates (CR) as low as 2.38 × 10−6 mm/year. Accelerated salt spray testing over 600 h in a 5 wt% NaCl salt fog confirmed the coatings' durability. The microstructures of PUr particles were determined through FESEM characterization. Additive‐blended PUUs exhibited moderate tensile strength and elongation at break compared to the reference PUU matrix. The hydrophobicity of both the reference sample (PUU) and the additive‐blended coatings was measured, with the highest recorded value being at 93.1 ± 0.048 for 10 wt%. Thermal gravimetric analysis demonstrated polymer degradation with a maximum of T5% observed at 304.1°C.

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Section: Resultsmentioning

confidence: 52%

Section: Mechanical Studiesmentioning

confidence: 99%

Electroactive additives into polyurethanes for high corrosion resistance coatings for mild steel

Borah,

Palanisamy

et al. 2024

Polymers for Advanced Techs

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“…Polyurea elastomer with collagen‐produced enzyme integration has been manufactured for membrane degradation. [ 9–15 ]…”

Section: Introductionmentioning

confidence: 99%

“…Polyurea elastomer with collagen-produced enzyme integration has been manufactured for membrane degradation. [9][10][11][12][13][14][15] Composite materials have been used to absorb blast energy and are considered useful materials for applications including explosive and ballistic impacts. Polyurea is relatively a recent concept when used for composites as a shock control material.…”

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confidence: 99%

Strength and durability that last—Mechanical properties of polyurea and polyurethane coated composites

et al. 2023

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Materials scientists are interested in the development of impact‐resistant materials for military and commercial products. Polyurea and polyurethane are utilized for impact absorption in numerous industries, however, hybrid polymers and their features are rarely explored. Due to their distinct chemical structures and cure kinetics, polyurea‐polyurethane hybrid materials are still in their infancy. The versatility of these materials drives the research to address this challenge. Small‐scale composite companies generally use spray guns to apply chemicals, raising costs. The current study focused on the development of coated composites for impact applications. Polyurea, polyurethane, and their hybrid were used as a coating material on the glass/epoxy composites. The flexural, impact (Charpy and Izod), and thermomechanical properties of these coated composites were investigated. It was observed that coating thickness enhanced impact properties of composite materials. The loss and storage modulus decreased with an increase in temperature for polyurea and polyurethane coated composites. The thermo‐mechanical analysis of hybrid coated composite showed the behavior to be dominantly similar to the polyurethane‐coated composite materials. The flexural strength of glass/epoxy composites increases with the coating, while increasing number of coating layers counters this effect.

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“…Polyurea (PU) coatings are gaining attention because of its rapid cure, even at low temperatures, water resistivity, outstanding mechanical properties, and chemical durability. [1][2][3] The fast reaction makes PU especially suitable for outdoor applications. [4][5][6] Due to its specific curing profile and exceptional film properties, PU materials are used in roof coatings, flat roof repair, pipe protection, tank coatings, etc.…”

Section: Introductionmentioning

confidence: 99%

Preparation, characterization, and influence of polyurea coatings on their layered composite materials based on flexible rebonded polyurethane

Temizkan¹,

Eroğlu²,

Ergün

et al. 2021

Polymer Engineering & Sci

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Preparation and characterization of a series of polyurea (PU) coatings and their influences on layered composite materials based on rebonded polyurethane (PUr) for floor application are described in terms of the raw materials, formulation, and application performance. While PU coatings show almost the same FTIR peaks, thermogravimetric analyses results reveal that thermal stabilities of the PU coatings are slightly enhanced with the use of trifunctional polyamine compound and one step degradation takes place beyond 300 C. All PU coatings have very dense, smooth, and bubble-free surfaces whereas the cross-sectional SEM images exhibit pores of different sizes. Contact angle values of all PU coatings are bigger than 90 indicating that the surfaces are hydrophobic. Using propylene carbonate in the preparation of methylene diphenyl diisocyanate (MDI) prepolymer and the chain extender in the PU coating formulation impacts the mechanical and electrical properties of the PU coatings as well as layered PU/PUr composite materials. In conclusion, not only the controllable physicochemical and mechanical properties of layered PUr/PU composites but also the usage potential of recycled PU scraps in these layered composites are very promising for better floor applications.

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Effect of polyol on physico-mechanical properties of polyurea film

Cited by 5 publications

References 12 publications

Electroactive additives into polyurethanes for high corrosion resistance coatings for mild steel

Electroactive additives into polyurethanes for high corrosion resistance coatings for mild steel

Strength and durability that last—Mechanical properties of polyurea and polyurethane coated composites

Preparation, characterization, and influence of polyurea coatings on their layered composite materials based on flexible rebonded polyurethane

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