Flame Retardant Properties of Polyurethane/Expandable Praphite Composites

Jin, Jing; Dong, Quanxiao; Zhong-jun, Shu; Wan-jin, Wang; He, Kui

doi:10.1016/j.proeng.2014.04.044

Cited by 36 publications

(19 citation statements)

References 30 publications

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“…Some studies on the combustion and thermal degradation of different kinds of PU are listed in Table 1. From the already published literature [25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41] on the thermogravimetric analysis of PU materials, thermal degradation usually occurs in two or three steps. The rst mass loss peak is observed at about 200-350 C, and the second and third at about 350-600 C. The temperature and stages of thermal degradation not only depended on the chemical structure of the polyol and isocyanate components of the PU, but also on the test conditions, such as combustion atmosphere, temperature and heating rate.…”

Section: Combustion and Thermal Degradation Of Pumentioning

confidence: 99%

Recent studies on the decomposition and strategies of smoke and toxicity suppression for polyurethane based materials

2016

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Section: Combustion and Thermal Degradation Of Pumentioning

confidence: 99%

Recent studies on the decomposition and strategies of smoke and toxicity suppression for polyurethane based materials

2016

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“…Data were collected and processed using IR solution software. Shimadzu Prestige-21 (200VCE) spectrophotometer operating at 300 MHz and 75 MHz, respectively was used for 1 H, 13 C NMR and 31 PNMR study. VNMR 6.1 C software was used for data processing.…”

Section: Characterization Techniquesmentioning

confidence: 99%

Intrinsically Flame Retardant Polyurethane Prepared with Epoxidized Soybean Oil and Vinylphosphonic Acid

Özşeker¹,

Karadeniz²,

Yılmaz³

2018

Croat. Chem. Acta

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The synthesis of novel polyol was carried out by the reaction of epoxidized soy-bean oil (ESBO) throught ring opening reaction with vinyl phosphonic acid (VPA) bearing two functional groups, vinyl and phosphonic acid. The synthesized polyol (PolP) and 4,4´-methylenebis(phenyl isocyanate) (MDI) were reacted to prepare biobased and inherently flame retardant polyurethane foam (PPPU). FTIR, 1 H, 13 C and 31 P NMR spectroscopy confirmed that the epoxy ring of ESBO was opened by phosphonic acid group of VPA, and vinyl group was not involved in the ring opening. The prepared polyurethane was characterized using fourier transformed infrared spectroscopy ( FTIR) and thermal properties were measured using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). XRD was used for crystallografic structure and SEM image of polyurethane showed smooth surface. When compared to phosphorous-free polyurethanes derived from soybean oil based polyols, PPUP exibited better flame retardant property with a limiting oxygen value index of 26.4.

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“…Current environmental issues require intensive research on energy efficiency and energy savings in buildings to reduce consumption of conventional fuel and CO2 emissions that generate greenhouse effect (Paraschiv et al, 2017). Therefore, the use of rigid polyisocyanurate-polyurethane foam (PIR/PUR) in construction has recently significantly increased due to its excellent mechanical properties and low thermal conductivity (Jin et al, 2014). However, changes in the thermal properties of this thermal insulation material due to environmental influences have not been sufficiently investigated.…”

Section: Introductionmentioning

confidence: 99%

“…During the winter, when the temperature falls below 0 ºC and the time when a PIR-insulated roof is heated by the sun and the material temperature rises higher than 45 ºC, the R-value of the thermal resistance decreases (Building Science Corporation, 2013). However, Finch et al (2014) noted that in roof assembly using other insulation materials, such as mineral wool, together with PIR may significantly improve the effective R-value of the polyisocyanurate as it keeps it near optimum temperatures (near room temperature). Berardi (2019) performed an experiment with several foam materials showing that the aging of the foams and the operating temperatures have higher impacts on the polyisocyanurates than on polyurethanes.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Variation of Thermal Conductivity of Rigid Polyisocyanurate Foam (PIR) in The Context of Aging

Makaveckas¹,

Bliūdžius²,

Levinskytė³

2020

XV International Conference on Durability of Building Materials and Components. eBook of Proceedings

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For most building insulation materials, dependency of the thermal conductivity on temperature is close to linear, and it increases with rising materials temperature, but the thermal conductivity of the polyisocyanurate foam (PIR) increases in the lower temperature range, so the heat transfer through the partition insulated with this material is increased in the cold season. The thermal conductivity of PIR also increases during the aging process, especially during the later operating period, which is not covered by the standard aging procedure used to determine the declared thermal conductivity value. Also, there is a lack of information how PIR reacts to the certain temperatures and other climate conditions, and how fast it loses its thermal properties. The aim of this experimental research was to analyse the change of the thermal conductivity depending on aging temperature. 30, 50 mm thick PIR samples were prepared for the test, and the thermal conductivity of all specimens was measured at the standard conditions prior to the start of the test using the heat flow meter FOX 314, and again after each stage of aging, when the samples were kept at the certain temperature for 21 days. The results showed that the thermal conductivity of PIR increases more (up to 10 %) when kept at higher temperatures (+50 °C, and +70 °C), and after specimens undergo negative temperatures (-18 °C) it has a minor influence to the change of thermal conductivity of PIR.

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Flame Retardant Properties of Polyurethane/Expandable Praphite Composites

Cited by 36 publications

References 30 publications

Recent studies on the decomposition and strategies of smoke and toxicity suppression for polyurethane based materials

Recent studies on the decomposition and strategies of smoke and toxicity suppression for polyurethane based materials

Intrinsically Flame Retardant Polyurethane Prepared with Epoxidized Soybean Oil and Vinylphosphonic Acid

Analysis of the Variation of Thermal Conductivity of Rigid Polyisocyanurate Foam (PIR) in The Context of Aging

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