Test Method for Determination of Retained Blowing Agent in Extruded Polystyrene Foam

2013 ◽  
Author(s):  
Keyword(s):  
Test Method ◽  
Polystyrene Foam ◽  
Blowing Agent ◽  
Extruded Polystyrene Foam

scholarly journals Determination of Hexabromocyclododecane in Expanded Polystyrene and Extruded Polystyrene Foam by Gas Chromatography-Mass Spectrometry

Molecules ◽  
2021 ◽  
Vol 26 (23) ◽  
pp. 7143
Author(s):  
Tianao Mao ◽  
Haoyang Wang ◽  
Zheng Peng ◽  
Taotao Ni ◽  
Tianqi Jia ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Solid Phase ◽  
Expanded Polystyrene ◽  
Gas Chromatography Mass Spectrometry ◽  
Polystyrene Foam ◽  
Chromatography Mass Spectrometry ◽  
Relative Standard ◽  
Extruded Polystyrene Foam

A gas chromatography-mass spectrometry (GC/MS) method for the determination of hexabromocyclododecane (HBCD) in expanded polystyrene and extruded polystyrene foam (EPS/XPS) was developed. The EPS/XPS samples were ultrasonically extracted with acetone and the extracts were purified by filtration through a microporous membrane (0.22 μm) and solid-phase extraction. The samples were analyzed using a GC/MS using the selected ion monitoring mode. The ions 157, 319 and 401 were selected as the qualitative ions, while ion 239 was chosen as the quantitative ion. An HBCD standard working solution with a concentration range of 1.0–50.0 mg/L showed good linearity. The detection limit of HBCD was 0.5 mg/kg, meeting the LPC limit (<100 or 1000 mg/kg). Six laboratories were selected to verify the accuracy of the method, and 10 samples were tested. The interlaboratory relative standard deviation range was 3.68–9.80%. This method could play an important role in controlling HBCD contamination in EPS/XPS.

The Development of a Non-Fluorocarbon-Based Extruded Polystyrene Foam Which Contains a Halogen-Free Blowing Agent

2004 ◽  
Vol 77 (4) ◽  
pp. 599-605 ◽  
Author(s):  
Youichi Ohara ◽  
Kenkichi Tanaka ◽  
Takahiro Hayashi ◽  
Haruo Tomita ◽  
Shigeru Motani
Keyword(s):  
Polystyrene Foam ◽  
Blowing Agent ◽  
Halogen Free ◽  
Extruded Polystyrene Foam

Effects of surfactants on mechanical and thermal properties of soy-based polyurethane foams

2020 ◽  
Vol 56 (6) ◽  
pp. 611-629
Author(s):  
Gurjot S Dhaliwal ◽  
Sudharshan Anandan ◽  
Mousumi Bose ◽  
K Chandrashekhara ◽  
Paul Nam
Keyword(s):  
Thermal Properties ◽  
Mineral Wool ◽  
Polyurethane Foams ◽  
Mechanical And Thermal Properties ◽  
Polystyrene Foam ◽  
Blowing Agent ◽  
Fold Reduction ◽  
High Insulation ◽  
Extruded Polystyrene Foam ◽  
Scanning Electron

Polyurethane foams are widely used for insulation applications due to their high insulation properties as compared to conventional materials such as extruded polystyrene foam and mineral wool. In this study, soy-based polyurethane foams were prepared using five different surfactants while keeping other components such as soy-based polyol, diisocyanate, catalyst, and blowing agent (water) constant. Prepared samples were tested for mechanical and thermal properties to evaluate the effect of different surfactants used in varying quantities. The morphology of the foam samples was observed using a scanning electron microscope. Seventeen fold reduction in the cell size was observed with an increase in the amount of surfactant from 0.5 to 5.0 g. Samples with higher amounts of surfactant also exhibited a higher number of closed cells. Better thermal insulation was observed for samples with 2.0 and 5.0 g of surfactant as compared to samples with 0.5 g of surfactant. A similar trend was observed in the mechanical strength, moisture absorbance, and density of the fabricated foam samples.

Building Systems Based on Foamed Modified Polymers

2021 ◽  
Vol 887 ◽  
pp. 446-452
Author(s):  
Igor V. Bessonov ◽  
L.K. Bogomolova ◽  
Alexey D. Zhukov ◽  
E.A. Zinoveva
Keyword(s):  
Flame Retardants ◽  
High Strength ◽  
Optimal Consumption ◽  
Polystyrene Foam ◽  
Modified Polymers ◽  
Building Systems ◽  
Mineral Additive ◽  
Crystalline Water ◽  
Extruded Polystyrene Foam

Systems of floor insulation on the ground, isolation of roads and shallow foundations suggest the use of heat-insulating products resistant to moisture, the minerals contained in it, having low heat conductivity and water absorption and relatively high strength for compressive loads.The aim of the research was to study the possibility of using mineral substances containing crystalline water as a dispersed component. Firstly, such compounds as a reinforcing component increase the strength characteristics of products. Secondly, being flame retardants, they contribute to increasing the fire safety of materials and building systems in which these materials are used. To achieve this goal, two particular tasks were set: determination of the optimal consumption of mineral modifying additives; assessment of exploitative stability of the received products. It was found that the introduction of a mineral modifying additive can significantly increase the compressive strength by 10% deformation of samples from extruded polystyrene foam. The exploitative stability of products with a mineral additive varies slightly and depends on its consumption and uniform distribution in the product matrix. The effect of additive consumption on the change in the thermal conductivity of products has not been established. A nomogram has been built which allows one to evaluate the properties of products and determine the optimal consumption of a modifying additive.Systems of using products from modified extruded polystyrene foam in monolithic foundations with insulation for buildings erected on problem soils are considered.

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