Thermal degradation study of pure rigid polyurethane in oxidative and non-oxidative atmospheres

He, Jiajia; Jiang, Lin; Sun, Jinhua; Lo, Siuming

doi:10.1016/j.jaap.2016.05.015

Cited by 60 publications

(24 citation statements)

References 46 publications

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“…TGA curves of polyurethane samples obtained using 1 mol % and 2 mol % of Mo catalyst and literature procedure, analyzed by the first derivative (DTG), showed a multistep decomposition pattern in agreements with literature ( Figure 5 ) [ 40 , 41 , 42 , 43 ]. At temperature lower than 200 °C the weight loss was due to small molecule products (not reacted isocyanates, water, ethers, etc.).…”

Section: Resultssupporting

confidence: 84%

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One-Pot Conversion of Epoxidized Soybean Oil (ESO) into Soy-Based Polyurethanes by MoCl2O2 Catalysis

Pantone¹,

Annese

Fusco

et al. 2017

Molecules

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An innovative and eco-friendly one-pot synthesis of bio-based polyurethanes is proposed via the epoxy-ring opening of epoxidized soybean oil (ESO) with methanol, followed by the reaction of methoxy bio-polyols intermediates with 2,6-tolyl-diisocyanate (TDI). Both synthetic steps, methanolysis and polyurethane linkage formation, are promoted by a unique catalyst, molybdenum(VI) dichloride dioxide (MoCl2O2), which makes this procedure an efficient, cost-effective, and environmentally safer method amenable to industrial scale-up.

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Section: Resultssupporting

confidence: 84%

“…At the same time, the polyols segments decompose to same kinds of aliphatic alcohols and the products become more complex as the evolved products interact with each other. At temperature above 350 °C, primary and secondary amines, vinyl ethers, CO 2 , HCN, and nitriles are the decomposition products [ 42 , 43 ].…”

Section: Resultsmentioning

confidence: 99%

One-Pot Conversion of Epoxidized Soybean Oil (ESO) into Soy-Based Polyurethanes by MoCl2O2 Catalysis

Pantone¹,

Annese

Fusco

et al. 2017

Molecules

View full text Add to dashboard Cite

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“…The FTIR spectra of the evolved gasses detected the absorption bands of unsaturated and saturated hydrocarbons (2800-3100 cm −1 ), aromatics (1510 cm −1 ), amine derivatives (~3400,~1600, and 1510 cm −1 ) and ethers (1000-1300 cm −1 ), while the absorption bands of CO 2 , water, isocyanates and nitriles almost completely disappeared [33]. These findings are in good agreement with previous studies showing the formation of aromatic amines (derived from anilines) and random polyol chain scission [33,36].…”

Section: Symbolsupporting

confidence: 91%

Development and Characterization of “Green Open-Cell Polyurethane Foams” with Reduced Flammability

et al. 2020

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This work presents the cell structure and selected properties of polyurethane (PUR) foams, based on two types of hydroxylated used cooking oil and additionally modified with three different flame retardants. Bio-polyols from municipal waste oil with different chemical structures were obtained by transesterification with triethanolamine (UCO_TEA) and diethylene glycol (UCO_DEG). Next, these bio-polyols were used to prepare open-cell polyurethane foams of very low apparent densities for thermal insulation applications. In order to obtain foams with reduced flammability, the PUR systems were modified with different amounts (10–30 parts per hundred polyol by weight—php) of flame retardants: TCPP (tris(1-chloro-2-propyl)phosphate), TEP (triethyl phosphate), and DMPP (dimethyl propylphosphonate). The flame retardants caused a decrease of the PUR formulations reactivity. The apparent densities of all the foams were comparable in the range 12–15 kg/m3. The lowest coefficients of thermal conductivity were measured for the open-cell PUR foams modified with DMPP. The lowest values of heat release rate were found for the foams based on the UCO_TEA and UCO_DEG bio-polyols that were modified with 30 php of DMPP.

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“…As shown in Figure A, the peaks at 1160 to 1050 cm −1 were ascribed to C–O, which was a result of the decomposition of RPUF . It is reported that the decomposition of urethane link in RPUF starts at 170°C to 200°C and decomposes into isocyanates and polyols .…”

Section: Resultsmentioning

confidence: 86%

“…As shown in Figure 5A, the peaks at 1160 to 1050 cm −1 were ascribed to C-O, which was a result of the decomposition of RPUF. 32 It is reported that the decomposition of urethane link in RPUF starts at 170°C to 200°C and decomposes into isocyanates and polyols. 33 As the temperature increases, the evolved gas products of MAPP exhibited characteristic peaks of PO·free radical (1252-900 cm −1 ), NH 3 (964 cm −1 , 930 cm −1 ), and H 2 O (3500 cm −1 ) from 300°C to 500°C.…”

Section: Pyrolysis Behavior Of Rpuf Compositesmentioning

confidence: 99%

Bi‐phase flame‐retardant effect of dimethyl methylphosphonate and modified ammonium polyphosphate on rigid polyurethane foam

Chen

et al. 2019

Polymers for Advanced Techs

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The flame‐retardant rigid polyurethane foams (RPUFs) with dimethyl methylphosphonate (DMMP) and modified ammonium polyphosphate (MAPP) were prepared. The results showed that the limiting oxygen index (LOI) value was improved by adding DMMP into RPUF/MAPP composite; 10 wt% of DMMP addition can increase the LOI value from 24.3% to 26.0%, where the commercial application standard of RPUF is achieved. Further benefits of using DMMP/MAPP system included restraining of total heat and smoke release, improvement of thermal stability, and char yield of RPUF. The thermogravimetric analysis (TGA)‐gas chromatography‐mass spectrometer (GC‐MS) results indicated that DMMP/MAPP could continuously release PO2 and PO·free radicals in the gas phase. In addition, DMMP/MAPP exhibited the charring effect and barrier effect in the condensed phase, such bi‐flame retardant effect exerted by DMMP/MAPP resulted in the enhanced flame retardant property of RPUF.

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Thermal degradation study of pure rigid polyurethane in oxidative and non-oxidative atmospheres

Cited by 60 publications

References 46 publications

One-Pot Conversion of Epoxidized Soybean Oil (ESO) into Soy-Based Polyurethanes by MoCl2O2 Catalysis

One-Pot Conversion of Epoxidized Soybean Oil (ESO) into Soy-Based Polyurethanes by MoCl2O2 Catalysis

Development and Characterization of “Green Open-Cell Polyurethane Foams” with Reduced Flammability

Bi‐phase flame‐retardant effect of dimethyl methylphosphonate and modified ammonium polyphosphate on rigid polyurethane foam

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