UV resistance and fire retardant property enhancement of unsaturated polyester composite

Maheshwari, Nilesh; Thakur, Shaila; Neogi, Pooja; Neogi, Sudarsan

doi:10.1007/s00289-015-1346-z

Cited by 14 publications

(13 citation statements)

References 13 publications

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“…The addition of aluminum hydroxide surprisingly decreased the LOI value by over 2% for the 15% aluminum compound content (19.3% ± 0.151%). This result is not consistent with the literature results [ 31 , 32 ]. It shows its poor flammability properties for polyurea/polyurethane applications.…”

Section: Resultscontrasting

confidence: 99%

Flame Retardancy Properties and Physicochemical Characteristics of Polyurea-Based Coatings Containing Flame Retardants Based on Aluminum Hydroxide, Resorcinol Bis(Diphenyl Phosphate), and Tris Chloropropyl Phosphate

Dukarski

Krzyz̈anowski²,

Gonsior³

et al. 2021

Materials

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Polyurea is a synthetic material made by the reaction of isocyanate and polymer blend-containing amines. Due to its outstanding mechanical properties and fast curing, polyurea-based coatings have found dozens of applications, including waterproofing and anti-corrosion coatings. Further development of this material can create a flame-retardant product, a good alternative for common products available on the market, such as intumescent coatings. To improve the flame retardancy of polyurea, several flame retardants were investigated. The influence of aluminum hydroxide, resorcinol bis(diphenyl phosphate) (RDP), and tris chloropropyl phosphate (TCPP) on flame retardancy and morphology was studied. The following methods were used: infrared spectroscopy, scanning electron microscopy, thermogravimetric analysis, limiting oxygen index, and tensile strength. The examinations mentioned above showed the improvement of flame-retardancy of polyurea for two products: chlorinated organophosphate and organophosphate. Nevertheless, using the chlorinated organophosphate additive caused a rapid deterioration of mechanical properties.

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Section: Resultscontrasting

confidence: 99%

Flame Retardancy Properties and Physicochemical Characteristics of Polyurea-Based Coatings Containing Flame Retardants Based on Aluminum Hydroxide, Resorcinol Bis(Diphenyl Phosphate), and Tris Chloropropyl Phosphate

Dukarski

Krzyz̈anowski²,

Gonsior³

et al. 2021

Materials

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“…Adding ATH to UP resin composites increases both the limiting oxygen index (LOI) and ATH load, improving fire resistance [ 32 ]. Increased fire resistance indicates that ATH may prolong the time to ignition (TTI) and reduce the heat release rate (HRR) [ 33 ].…”

Section: Resultsmentioning

confidence: 99%

“…This indicates that decomposition did not continue even though the specimen temperatures increased. The final residue of these samples contained alumina which has a melting temperature of 2054 °C, much higher than the melting temperature of UP resin [ 32 , 33 ].…”

Section: Resultsmentioning

confidence: 99%

Industrial Implementation of Aluminum Trihydrate-Fiber Composition for Fire Resistance and Mechanical Properties in Glass-Fiber-Reinforced Polymer Roofs

et al. 2022

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It is difficult to obtain suitable fire resistance and mechanical properties for glass-fiber-reinforced polymer (GFRP) roof material in industrial applications. Although some efforts to improve the fire resistance properties of GFRP have been carried out, in practice this sometimes degrades the mechanical properties. Therefore, the base materials, such as filler and reinforcing fiber, must be appropriately combined to simultaneously improve both fire resistance and mechanical properties. The present study examines improvements in GFRP roof material by investigating the effect of aluminium trihydrate (ATH) as a filler and the combination of a chopped strand mat (CSM) with woven roving (WR) and stitched mat (STM) fibers as the reinforcement in a composite GFRP roof structure. The roof samples were prepared following industrial machine standards using the specified materials. The mechanical properties of GFRP were evaluated using tensile, flexural and impact tests, following ASTM D638, ASTM D790 and ASTM D256 standards, respectively. The fire properties were examined through fire tests following the ASTM D635 standard. The results show that the GFRP roof composed of CSM/WR fibers had a 40% higher tensile strength (103.5 MPa) compared with the GFRP roof without CSM fibers (73.8 MPa). The flexural strength of the GFRP roof with CSM/WR fibers was also 57% higher than the roof without fibers, with a ratio of 315.61 MPa to 201 MPa. With the use of CSM/WR fibers, the fire resistance also increased by 23%, resulting in a ratio of 4.31 mm/min to 5.32 mm/min. These results demonstrate that the combination of CSM/WR fibers as a reinforcement would be an excellent option for producing an improved GFRP roof with better industrial properties, especially when producing improved GFRP roofs using a continuous lamination machine.

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“…Given this issue, loading of the additives with UV absorption quality into UP matrix leads to strengthening and longevity of these polymers. 13 In order to strengthen and improve the various properties of the nanocomposite coatings such as thermal stability, mechanical features, viscoelastic characteristics, UVprotection and etcetera, one could benefit from organic and inorganic nanofillers such as ZnO, Fe 2 O 3 , TiO 2 , Al 2 O 3 , clay, graphene oxide, silica nanoparticles in addition to carbon nanotubes and carbon quantum dots. [14][15][16] During the past decades, usage of polymer substances has been rapidly increased, however it has been well proven that the fast optical degradation of these substances is possible when exposed to the natural air admission.…”

Section: Introductionmentioning

confidence: 99%

Green fluorescent unsaturated polyester/graphitic carbon nitride quantum dots nanocomposites: Preparation and study of UV-resistance, mechanical and viscoelastic properties

Madhi

2023

Journal of Composite Materials

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The present study has been conducted to investigate the protective effect of graphitic carbon nitride quantum dots (CNQDs) against high energetic and harmful ultraviolet (UV) rays in addition to strengthening impact of CNQDs over mechanical and viscoelastic properties of unsaturated polyester (UP). To achieve this purpose, CNQDs were synthesized using citric acid and extra urea via microwave-assisted method. Afterwards, several percentages of CNQDs (0.25, 0.5 and 0.75 wt%) were added to UP and after curing process, UP/CNQDs nanocomposites were obtained with different percentages. By certain microscopic and spectroscopic tests, correctness of CNQDs formation and various features of UP/CNQDs nanocomposites were examined. Adding CNQDs to the matrix of polyester resin allowed creation of nanocomposites with fluorescence emission ability, also blockage of UV rays by the strengthened samples. Strengthening UP by CNQDs resulted in growth of thermal stability, improvement of tensile strength, 10%–15% increase in flexibility, and progress in viscoelastic characteristics including storage modulus, Tg and cross-linking density.

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UV resistance and fire retardant property enhancement of unsaturated polyester composite

Cited by 14 publications

References 13 publications

Flame Retardancy Properties and Physicochemical Characteristics of Polyurea-Based Coatings Containing Flame Retardants Based on Aluminum Hydroxide, Resorcinol Bis(Diphenyl Phosphate), and Tris Chloropropyl Phosphate

Flame Retardancy Properties and Physicochemical Characteristics of Polyurea-Based Coatings Containing Flame Retardants Based on Aluminum Hydroxide, Resorcinol Bis(Diphenyl Phosphate), and Tris Chloropropyl Phosphate

Industrial Implementation of Aluminum Trihydrate-Fiber Composition for Fire Resistance and Mechanical Properties in Glass-Fiber-Reinforced Polymer Roofs

Green fluorescent unsaturated polyester/graphitic carbon nitride quantum dots nanocomposites: Preparation and study of UV-resistance, mechanical and viscoelastic properties

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