Improvement of performance behavior of cellulosic fiber with polyurethane acrylate copolymers

Sultan, Misbah; Bhatti, Haq Nawaz; Zuber, Mohammad; Bhatti, Ijaz Ahmad; Sheikh, Munir A.

doi:10.1016/j.carbpol.2011.05.045

Cited by 16 publications

(8 citation statements)

References 28 publications

(23 reference statements)

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“…The peak at 3296.8 cm -1 is assigned to the N-H stretching vibrations [19,[23][24][25][26][27]. The peaks at 2971 and 2867 cm -1 are from the asymmetric and symmetric stretching vibrations of CH 2 , respectively [2,19,24]. The peak at *2270 cm -1 is assigned to the N=C=O group [1,2,19,28].…”

Section: Ft-irmentioning

confidence: 99%

“…The peaks at 2971 and 2867 cm -1 are from the asymmetric and symmetric stretching vibrations of CH 2 , respectively [2,19,24]. The peak at *2270 cm -1 is assigned to the N=C=O group [1,2,19,28]. The peak at *1717 cm -1 is assigned to the stretching vibrations of hydrogen-bonded C=O groups [17,19,24,[28][29][30][31].…”

Section: Ft-irmentioning

confidence: 99%

“…The peak at *1530 cm -1 is from amide II (urethane N-H bending ? C-N stretching) [2,25,26]. The peak at 1085 cm -1 is assigned to the C-O-C stretching vibrations [24,29,30].…”

Section: Ft-irmentioning

confidence: 99%

“…These materials are also commonly used in mattresses and upholstery foams. FPF have many advantages, such as a wide range of flexibility and hardness, good cushioning, high durability during use, good thermal and acoustic insulation properties, resistance to chemicals, low price and low density [1][2][3]. The main disadvantage of FPF is their high flammability.…”

Section: Introductionmentioning

confidence: 99%

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Thermal and mechanical behaviour of flexible polyurethane foams modified with graphite and phosphorous fillers

2012

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Flexible polyurethane foams (FPF) are polymer materials that have high flammability. Fyrol PNX (FPNX) and expandable graphite (EG), have been used to modify the properties of these materials. The aim of this study was to assess the possibility of improving the thermal stability and flame retardancy of FPF by the addition of FPNX and EG fillers. The prepared foams were characterised by their apparent density, hardness, flexibility, irreversible strain and linear flammability, as well as thermogravimetric analysis (TGA), dynamic mechanical analysis, Fourier transform infrared spectroscopy (FT-IR) and pyrolysis combustion flow calorimetry (PCFC) measurements. The apparent density, hardness, flexibility and irreversible strain results showed that the addition of graphite and phosphorous fillers to the FPF makes slight changes to the mechanical properties, which remain within the acceptable norms. It was also observed that reducing the amount of Fyrol PNX and replacing it with the same amount of EG allowed similar values of linear flammability to be obtained with a simultaneous increase in thermal stability, as shown in the TGA study and the PCFC test. Moreover, it was found that the modification of flexible polyurethane foam by the addition of a mixture of FPNX and EG fillers allows the best properties of this type of materials to be obtained. This result indicates that this type of modification could be an effective way to improve the thermal stability of FPF.

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Section: Ft-irmentioning

confidence: 99%

Section: Ft-irmentioning

confidence: 99%

“…The peak at *1530 cm -1 is from amide II (urethane N-H bending ? C-N stretching) [2,25,26]. The peak at 1085 cm -1 is assigned to the C-O-C stretching vibrations [24,29,30].…”

Section: Ft-irmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermal and mechanical behaviour of flexible polyurethane foams modified with graphite and phosphorous fillers

2012

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“…[4][5][6] However, FPUF readily ignites and burns rapidly with a high rate of heat release and evolution of a wide range of combustion products like, smoke and toxic gases, such as hydrocarbons, isocyanates, etc. [4][5][6] However, FPUF readily ignites and burns rapidly with a high rate of heat release and evolution of a wide range of combustion products like, smoke and toxic gases, such as hydrocarbons, isocyanates, etc.…”

Section: Introductionmentioning

confidence: 99%

A novel and effective method to fabricate flame retardant and smoke suppressed flexible polyurethane foam

et al. 2015

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In the present work, chitosan and magnesium hydroxide (MH) were successfully deposited on the surface of flexible polyurethane foam (FPUF). Due to the strong interaction, the coated foam with 10.3 wt% weightgain could be prepared by constructing one chitosan layer and one MH layer. Scanning electron microscopy images showed that this coating continuously covered the substrate. The combustion properties of FPUF were investigated by cone calorimeter and smoke density tests, and the gases released during the thermal degradation process were monitored by thermal gravimetric-Fourier transform infrared spectrometry. It was found that the FPUF with a chitosan/MH coating kept its shape and released less black smoke after being exposed to a butane flame for 10 s, while the pure foam was consumed completely. The cone calorimeter test data indicated that a reduction in the peak heat release rate of the foam with 10.3 wt% weight-gain achieved 52.6% relative to pure foam. Remarkably, the smoke density test results showed that the coating can significantly suppress the smoke production of FPUF. Moreover, the evolved gas products of FPUF during the thermal decomposition were effectively decreased after being covered with the hybrid coating.

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Structure and properties of polylactide toughened by polyurethane prepolymer

Zhang

Koranteng

et al. 2015

J of Applied Polymer Sci

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In this study, polyurethane prepolymer (PUP) was prepared by the reaction of Poly-1,4-butylene glycol adipate diol (PBA) and 4,4 0 -Methylenedi-p-phenyl diisocyanate (MDI). The as-prepared PUP was then blended with Polylactide (PLA), and the impact of the PUP on the blends regarding their structure and properties were thoroughly analyzed. Also, PLA was blended with PU powder without isocyanate groups (NCO) as an important control sample (PLAPW) to study the interface interaction of the blends. Obvious yield and neck stretch were obtained after the addition of PUP, and the elongation ratio at break increased from 2.9% to 231.5%. In contrast, the mechanical properties of PLAPW decreased significantly mainly due to the simple physical blending of the polymers without the formation of covalent bonds. Also, the results of the FTIR, SEM, DSC, and DMA analysis showed that the reactions of NCO groups in PUP with the terminal hydroxyl or carboxyl groups in PLA significantly improved the compatibility of the PUP and PLA blend. Compared to pristine PLA, the highest decomposition temperature of the PLA and PUP blend (PLAPU) increased from 359.38C to 362.68C. Additionally the thermal stability and mechanical properties of the blended materials were exceedingly improved even with only 5% of PUP in the blended materials.

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Improvement of performance behavior of cellulosic fiber with polyurethane acrylate copolymers

Cited by 16 publications

References 28 publications

Thermal and mechanical behaviour of flexible polyurethane foams modified with graphite and phosphorous fillers

Thermal and mechanical behaviour of flexible polyurethane foams modified with graphite and phosphorous fillers

A novel and effective method to fabricate flame retardant and smoke suppressed flexible polyurethane foam

Structure and properties of polylactide toughened by polyurethane prepolymer

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