Influences of turkey feather fiber loading on significant characteristics of rigid polyurethane foam: Thermal degradation, heat insulation, acoustic performance, air permeability and cellular structure

2021 ◽  
Vol 308 ◽  
pp. 125014
Author(s):  
Mustafa Khaleel ◽  
Ugur Soykan ◽  
Sedat Çetin
Keyword(s):  
Thermal Degradation ◽  
Polyurethane Foam ◽  
Cellular Structure ◽  
Heat Insulation ◽  
Air Permeability ◽  
Rigid Polyurethane Foam ◽  
Acoustic Performance ◽  
Fiber Loading ◽  
Feather Fiber

scholarly journals Density Effect on Flame Retardancy, Thermal Degradation, and Combustibility of Rigid Polyurethane Foam Modified by Expandable Graphite or Ammonium Polyphosphate

Polymers ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 668 ◽  
Author(s):  
Yang ◽  
Liu ◽  
Jiang ◽  
Chen ◽  
Wan
Keyword(s):  
Weight Loss ◽  
Thermal Degradation ◽  
Heat Release ◽  
Polyurethane Foam ◽  
Apparent Density ◽  
Flame Retardancy ◽  
Ammonium Polyphosphate ◽  
Expandable Graphite ◽  
Rigid Polyurethane Foam ◽  
Combustion Behaviors

The current study aims at comparatively investigating the effect of apparent density on flame retardancy, thermal degradation and combustion behaviors of rigid polyurethane foam (RPUF), RPUF/ expandable graphite (EG) and RPUF/ ammonium polyphosphate (APP). A series of RPUF, RPUF/EG and RPUF/APP samples with different apparent densities (30, 60 and 90 kg/m3) were prepared. The flame retardancy, thermal degradation, and combustion behaviors of each sample were investigated. Limiting oxygen index (LOI) results indicated that increasing apparent density was beneficial to the flame retardancy of all foam systems. The effect of apparent density on the enhancement of flame retardancy followed the sequence of RPUF < RPUF/APP < RPUF/EG. Thermogravimetric analysis (TGA) results showed that an increase in the apparent density can cause more weight loss in the first degradation stage and less weight loss in the second degradation stage for all foam systems. The combustion behaviors also showed significant differences. The samples with a higher apparent density showed a longer duration of heat release and higher total heat release (THR). The findings in this study demonstrated that apparent density played an important role in flame retardancy, thermal degradation, and combustion behaviors of RPUF, which must be paid more attention in the studies of flame-retardant RPUF.

Cyanide toxicity from the thermal degradation of rigid polyurethane foam

AIHAJ ◽  
1979 ◽  
Vol 40 (9) ◽  
pp. 757-762 ◽  
Author(s):  
R. HAYS BELL ◽  
KLAUS L. STEMMER ◽  
WILLIAM BARKLEY ◽  
LOIS D. HOLLINGSWORTH
Keyword(s):  
Thermal Degradation ◽  
Polyurethane Foam ◽  
Rigid Polyurethane Foam ◽  
Cyanide Toxicity

scholarly journals Bio-Based Rigid Polyurethane Foam Composites Reinforced with Bleached Curauá Fiber

2021 ◽  
Vol 22 (20) ◽  
pp. 11203
Author(s):  
Sylwia Członka ◽  
Eduardo Fischer Kerche ◽  
Roberta Motta Neves ◽  
Anna Strąkowska ◽  
Krzysztof Strzelec
Keyword(s):  
Mechanical Properties ◽  
Polyurethane Foam ◽  
Cellular Structure ◽  
Cell Structure ◽  
Rigid Polyurethane Foam ◽  
Processing Times ◽  
Civil Aircraft ◽  
Viscoelastic Characteristics ◽  
Vegetable Fiber ◽  
Curauá Fiber

This study aims to evaluate the influence of using a bleached Curauá fiber (CF) as filler in a novel rigid polyurethane foam (RPUF) composite. The influence of 0.1, 0.5 and 1 wt.% of the reinforcements on the processing characteristics, cellular structure, mechanical, dynamic-mechanical, thermal, and flame behaviors were assessed and discussed for RPUF freely expanded. The results showed that the use of 0.5 wt.% of CF resulted in RPUF with smoother cell structure with low differences on the processing times and viscosity for the filled pre-polyol. These morphological features were responsible for the gains in mechanical properties, in both parallel and perpendicular rise directions, and better viscoelastic characteristics. Despite the gains, higher thermal conductivity and lower flammability were reported for the developed RPUF composites, related to the high content of cellulose and hemicellulose on the bleached CF chemical composition. This work shows the possibility of using a Brazilian vegetable fiber, with low exploration for the manufacturing of composite materials with improved properties. The developed RPUF presents high applicability as enhanced cores for the manufacturing of structural sandwich panels, mainly used in civil, aircraft, and marine industries.

scholarly journals Thermal Degradation and Flame Retardant Mechanism of the Rigid Polyurethane Foam Including Functionalized Graphene Oxide

Polymers ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 78 ◽  
Author(s):  
Xuexi Chen ◽  
Junfei Li ◽  
Ming Gao
Keyword(s):  
Graphene Oxide ◽  
Thermal Degradation ◽  
Flame Retardant ◽  
Polyurethane Foam ◽  
Main Stage ◽  
Rigid Polyurethane Foam ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide ◽  
Limiting Oxygen Index ◽  
Char Layer

A flame retardant rigid polyurethane foam (RPUF) system containing functionalized graphene oxide (fGO), expandable graphite (EG), and dimethyl methyl phosphonate (DMMP) was prepared and investigated. The results show that the limiting oxygen index (LOI) of the flame-retardant-polyurethane-fGO (FRPU/fGO) composites reached 28.1% and UL-94 V-0 rating by adding only 0.25 g fGO. The thermal degradation of FRPU samples was studied using thermogravimetric analysis (TG) and the Fourier transform infrared (FT-IR) analysis. The activation energies (Ea) for the main stage of thermal degradation were obtained using the Kissinger equation. It was found that the fGO can considerably increase the thermal stability and decrease the flammability of RPUF. Additionally, the Ea of FRPU/fGO reached 191 kJ·mol−1, which was 61 kJ·mol−1 higher than that of the pure RPUF (130 kJ·mol−1). Moreover, scanning electron microscopy (SEM) results showed that fGO strengthened the compactness and the strength of the “vermicular” intumescent char layer improved the insulation capability of the char layer to gas and heat.

scholarly journals Nitrogen/phosphorus synergistic flame retardant-filled flexible polyurethane foams: microstructure, compressive stress, sound absorption, and combustion resistance

RSC Advances ◽  
2019 ◽  
Vol 9 (37) ◽  
pp. 21192-21201 ◽  
Author(s):  
Ting-Ting Li ◽  
Mengfan Xing ◽  
Hongyang Wang ◽  
Shih-Yu Huang ◽  
Chengeng Fu ◽  
...  
Keyword(s):  
Flame Retardant ◽  
Polyurethane Foam ◽  
Sound Absorption ◽  
Heat Insulation ◽  
Polyurethane Foams ◽  
Rigid Polyurethane Foam ◽  
Flexible Polyurethane Foam ◽  
Synergistic Flame Retardant ◽  
Flexible Polyurethane ◽  
Nitrogen Phosphorus

Compared with a rigid polyurethane foam, a flexible polyurethane foam (FPUF) has more diversified applications including filtration, sound absorption, vibration-proofing, decoration, packaging, and heat insulation.

Grey Relational Analysis and its C# Program in Analysis of Rigid Polyurethane Foam

2014 ◽  
Vol 1061-1062 ◽  
pp. 1167-1170
Author(s):  
Xiao Gang Zhao ◽  
Yi Zhou ◽  
Jian Yu Zhao ◽  
Xiao Yuan Yang ◽  
Xing Zheng
Keyword(s):  
Polyurethane Foam ◽  
Grey Relational Analysis ◽  
Heat Insulation ◽  
Impact Factors ◽  
Insulation Material ◽  
Rigid Polyurethane Foam ◽  
Relational Analysis ◽  
C Program ◽  
Grey Relational ◽  
The Impact

With the rapid development of petroleum industry in China, the electrical heat tracing becomes very important for viscous oil transportation, while the heat insulation acts as the key to the application of electrical heat tracing. Rigid polyurethane foam has been widely used in long-distance pipelines for its advantages as the heat insulation material. However, there is also a lack of systematic analysis on the impact factors of such material, thus it is urgent to find out a practical method to distinguish the major impact factors. This paper introduces the Grey Relational Analysis (GRA) with its C# program, and it is proposed to analyze the actual impact factors of rigid polyurethane foam. The application shows that this method is practical, simple, rapid and accurate, so it suitable for similar applications in other fields.

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