Reaction kinetics during non-isothermal solid-state synthesis of boron trioxide via boric acid dehydration

Kaur, Gagandeep; Kainth, Shagun; Kumar, Rohit; Sharma, Piyush; Pandey, O. P.

doi:10.1007/s11144-021-02084-8

Cited by 19 publications

(5 citation statements)

References 45 publications

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“…52,55 Furthermore, the synergism of boric acid and APP-THEIC involves the chemical routes of APP-THEIC decomposes to polyphosphoric acid and build up polyphosphate. 56 After combining with boric acid it undergoes to build borophosphate 57,58 that expand when exposed to heat, forming a protective layer (as mentioned at equation ( 3)). This layer insulates the material from heat and slows the spread of fire.…”

Section: Bn-gbc Sample (Almost 2%mentioning

confidence: 99%

Effect of fire-retardant coating on bamboo and banana-based biocomposites: A comparative study thermogravimetric analysis and cone calorimeter tests

Melati

Settar

Rashid

et al. 2023

Journal of Thermoplastic Composite Materials

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In this work, a thermal behaviour comparison of a new bamboo-based and banana-based Green Bio-Composites (GBC) is conducted using thermogravimetric analysis (TGA) and cone-calorimeter experiments. An Intumescent Fire-Retardant (IFR) coating (a mixture of Exolit IFR36 and boric acid) has been applied on the investigated GBC materials in order to explore the flammability resistance of such GBCs. Vacuum Bag Resin Transfer Moulding (VBRTM) technique has been used to manufacture the samples. TGA test have been conducted under oxidative atmosphere with three different heating rates while cone calorimeter tests have been performed with a horizontally exposure on the top surface of the sample. The outcomes of TGA revealed that Bamboo-based (BM-GBC) and Banana-based (Bn-GBC) materials exhibited similar thermal degradation patterns. However, BM-GBC outperformed Bn-based in the cone calorimetry analysis, this is proven by the fire reaction parameters as well as the higher char residue. In addition, IFR coating improved the flame retardancy of both GBCs, reduced the Peak Heat Release Rate (PHRR) by approximately 40–50% and smoke production (SEA) by 26%. SEM and EDS analysis of char residue were performed to deeply investigate the effectiveness of the IFR as a protecting layer.

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Section: Bn-gbc Sample (Almost 2%mentioning

confidence: 99%

Effect of fire-retardant coating on bamboo and banana-based biocomposites: A comparative study thermogravimetric analysis and cone calorimeter tests

Melati

Settar

Rashid

et al. 2023

Journal of Thermoplastic Composite Materials

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“…The TGA test performed at temperatures ranging from 30°C to 900°C shows that boric acid undergoes at three stages reaction process, with the loss of one water molecule at 140°C (Equation ), followed by a reaction at 180°C (Equation ) that replaces another water molecule and forms tetra boric acid (proboric‐acid/H2B4O7), and a reaction at 530°C (Equation ) that leads to boron trioxide 52,54 . The synergism between boric acid and APP–THEIC involves the chemical decomposition of APP–THEIC into polyphosporic acid, which then forms polyphosphate upon the combination with boric acid to form borophosphate, which expands when subjected to heat, a protective layer is formed (as described in Equation ) 64–66 . This layer insulates the material from heat and slows down the propagation of fire.…”

Section: Resultsmentioning

confidence: 99%

“…52,54 The synergism between boric acid and APP-THEIC involves the chemical decomposition of APP-THEIC into polyphosporic acid, which then forms polyphosphate upon the combination with boric acid to form borophosphate, which expands when subjected to heat, a protective layer is formed (as described in Equation 3). [64][65][66] This layer insulates the material from heat and slows down the propagation of fire. Exolit IFR26 functions as a blowing fire-retardant agent, while boric acid act as char-forming agents, helping to form protective char layer on the surface of the samples.…”

Section: Fire Retardant Mechanismmentioning

confidence: 99%

Experimental analysis of the effect of natural fibers and SiC filler on the thermal behavior of green biocomposites

Melati

Settar

Chetehouna

et al. 2023

J of Applied Polymer Sci

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The present work deals with the thermal behavior investigation of new biocomposite materials intended to be used for process engineering applications. Particular attention is given to the thermal degradation of such materials. Thermal characterization at different scales is performed using thermogravimetric analysis (TGA) and cone calorimeter experiments. The main purpose is to compare the thermal behavior of new bamboo‐based and banana‐based Green Biocomposites (GBCs). An intumescent fire retardant (IFR) coating, which is a mixture of APP and boric acid was applied on the GBC sample surface to study the flame retardancy. The GBC samples was first manufactured using a vacuum resin transfer molding. TGA results showed that bamboo‐based (BM‐GBC) and banana‐based (Bn‐GBC) materials exhibits similar thermal degradation pattern. While cone calorimeter experiments revealed that BM‐GBC outperforms than Bn‐GBC. The IFR coating improved the flame retardancy of both GBCs by reducing the heat release rate as well as a noticeable reduction in terms of smoke emission. Finally, to improve the thermal stability of Bn‐GBC material, SiC powder is added as a filler. The IFR coating and SiC powder addition promotes considerably the thermal behavior of Bn‐GBC materials.

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“…To design an efficient pyrolysis reactor, it is crucial to investigate thermal kinetics involved during pyrolysis of plastics [10]. Several research groups studied thermal kinetics of various materials by using thermal analysis techniques [11][12][13][14][15][16][17][18][19][20]. They determined kinetic triplets (activation energy, pre-exponential factor and reaction mechanism) by following different integral as well differential kinetic models.…”

Section: Introductionmentioning

confidence: 99%

Non-isothermal kinetic analysis of UHMWPE sheet

Jagriti,

Khattar,

Kainth

et al. 2024

Preprint

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Thermal decomposition behavior of ultra high molecular weight polyethylene (UHMWPE) is studied through thermogravimetric analysis technique. Thermograms are recorded at four different heating rates (2.5, 5, 10, 15 and 20 ℃/min) in nitrogen environment. These thermograms revealed that the thermal decomposition of UHMWPE occurred in three different stages. Among these stages, second stage of decomposition is highly complex. Therefore, deconvoluted into two peaks by using bi-Gaussian asymmetric function. Kinetic triplets related to these peaks are determined by adopting two iso-conversional kinetic models (Starink (SR) and Friedman (FR)). The reaction mechanism is also identified by using integral master plot method. Finally, thermodynamic parameters viz. change in entropy (∆S), change in enthalpy (∆H) and change in Gibbs free energy (∆G) are estimated at considered heating rates.

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Reaction kinetics during non-isothermal solid-state synthesis of boron trioxide via boric acid dehydration

Cited by 19 publications

References 45 publications

Effect of fire-retardant coating on bamboo and banana-based biocomposites: A comparative study thermogravimetric analysis and cone calorimeter tests

Effect of fire-retardant coating on bamboo and banana-based biocomposites: A comparative study thermogravimetric analysis and cone calorimeter tests

Experimental analysis of the effect of natural fibers and SiC filler on the thermal behavior of green biocomposites

Non-isothermal kinetic analysis of UHMWPE sheet

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