Review of moisture behavior and thermal performance of polystyrene insulation in building applications

Cai, Shanshan; Zhang, Boxiong; Cremaschi, Lorenzo

doi:10.1016/j.buildenv.2017.06.034

Cited by 84 publications

(29 citation statements)

References 23 publications

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“…It is generally known that the microlevel pore cell diameter changes between 100 and 300 μm for the expanded polystyrene and the diameters of the pores decrease with the increase in density [8,17]. When the internal structures for the expanded polystyrene with different density values was examined, it was detected that the pore dimensions decrease because of the increase in density, as in the literature, as seen in Figure 6.…”

Section: Resultssupporting

confidence: 59%

“…Insulation boundary conditions were given to the upper and lower walls, and 3 International Journal of Polymer Science International Journal of Polymer Science one-dimensional solutions were realized. The transport and heat transmissions are negligible in the event that the cell diameter is approximately 4 mm less [8]. As a result, neglecting the heat transfer because it is much lower with natural transport was not a mistaken acceptance in terms of the correctness of the results.…”

Section: Methodsmentioning

confidence: 97%

“…Investigation of the thermal conductivity of insulation materials in different temperatures is important for efficient energy use. Recently, foam insulation materials have become especially popular due to their low thermal conductivity, and they are commonly used because the production technology of expanded polystyrene is easy, production cost is low [4], the pores of the material are closed, the material is waterproof, and they have low thermal conductivity due to the air contained within them [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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The Numerical and Experimental Investigation of the Change of the Thermal Conductivity of Expanded Polystyrene at Different Temperatures and Densities

Doğan¹,

Tan

2019

International Journal of Polymer Science

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The determination of the thermal conductivity of insulation materials depending on which parameters in the application as well as the production is very important. In this direction, the parameters affecting thermal conductivity should be determined to improve the efficiency of the insulation materials. It is also a fact that expanded polystyrene blocks have different thermal conductivities at the same density value depending on the production process. In this study, it was determined, experimentally and numerically, that the thermal conductivity of expanded polystyrene material at different densities is dependent on which parameters and changes in temperature. Expanded polystyrene materials consist of blocks of 30×30 cm with density of 16, 21, and 25 kg/m3 and a thickness of 20 mm. Thermal conductivity measurements were performed in FOX 314 (Laser Comp., USA) operating in accordance with ISO 8301 and EN 12667 standards. The measurements were made for expanded polystyrene blocks at the average temperatures of 10°C, 20°C, 30°C, and 40°C. The numerical study has three stages as the acquisition of electron microscope images (SEM) of expanded polystyrene blocks, modeling of internal structure geometry with CAD program, and realization of solutions with a finite element-based ANSYS program. Findings from experimental and numerical studies and the parameters affecting thermal conductivity were determined. Finally, it is thought that numerical methods can be used to obtain a preliminary idea for EPS material in determining thermal conductivity by comparing the findings of experimental and numerical studies.

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Section: Resultssupporting

confidence: 59%

Section: Methodsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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The Numerical and Experimental Investigation of the Change of the Thermal Conductivity of Expanded Polystyrene at Different Temperatures and Densities

Doğan¹,

Tan

2019

International Journal of Polymer Science

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“…In addition to environmental protection, it is very important to meet the expectations of ordinary building users, who in general are not experts in the field of energy saving [2]. In building envelope insulation systems, we very often apply such insulation materials as expanded polystyrene (EPS) and extruded polystyrene (XPS) [3], or their modifications [4][5][6][7]. Such systems can be used on building envelopes as insulation from the inside, which is often applied in buildings having historical character [8].…”

Section: Introductionmentioning

confidence: 99%

Experimental Studies Involving the Impact of Solar Radiation on the Properties of Expanded Graphite Polystyrene

Krause¹,

Nowoświat²

2019

Energies

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This article presents the research studies aimed at identifying the behavior of expanded polystyrene with the addition of graphite in the conditions of exposure to solar radiation. For this purpose, a series of in situ tests and laboratory studies were carried out. Three types of material were tested, i.e. expanded polystyrene (EPS) (white polystyrene), polystyrene with the addition of graphite (gray polystyrene) and two-layer polystyrene (gray bottom layer and white top layer). Temperature distributions on the surfaces of the panels in field and laboratory conditions were determined. The distributions of temperature were recorded at varied wind impact (field conditions and laboratory conditions) and at varied impact of solar radiation (laboratory conditions). Based on the conducted experiments, differences in temperature distribution on the surfaces of the tested panels were determined. In addition, geometric changes and deformation levels of the tested white and gray expanded polystyrene panels exposed to artificial sun radiation were determined in laboratory conditions.

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“…Over decades, styrene (ST) monomer has been employed to manufacture important commercial commodities such as acrylonitrile butadiene styrene (ABS), and styrene butadiene rubber (SBR) [1][2][3][4]. However, during distillation, storage, and transportation of ST, undesired polymer (UP) formation or organic peroxides fouling can presumably occur in the processing equipment, which reduces the heat transfer rate and increases the required time of cleaning [5,6].…”

Section: Introductionmentioning

confidence: 99%

A Theoretical and Experimental Study for Screening Inhibitors for Styrene Polymerization

2019

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Styrene is one of the most important monomers utilized in the synthesis of various polymers. Nevertheless, during distillation, storage, and transportation of ST, undesired polymer (i.e., UP) formation can take place. Thus, the control of undesired polymerization of styrene is a challenging issue facing industry. To tackle the mentioned issue, the antipolymer and antioxidant activity of stable nitroxide radicals (i.e., SNRs) and phenolics in styrene polymerization were studied by density functional theory (DFT) calculation and experimental approach. The electrophilicity index and growth percentage have been determined by DFT calculation and experimental approach, respectively. It is depicted that 2,6-di-tert-butyl-4-methoxyphenol (DTBMP) and 2,6-di-tert-butyl-4-methylphenol (BHT) from phenolics, and 4-hydroxy-2,2,6,6-tetramethyl piperidine 1-Oxyl (4-hydroxy-TEMPO) and 4-oxo-2,2,6,6-tetramethylpiperidine 1-Oxyl (4-oxo-TEMPO) from stable nitroxide radicals were the most effective inhibitors. Also, the growth percentage of DTMBP, BHT, 4-hydroxy-TEMPO, and 4-oxo-TEMPO after 4 h were 16.40, 42.50, 24.85, and 46.8, respectively. In addition, the conversion percentage of DTMBP, BHT, 4-hydroxy-TEMPO, and 4-oxo-TEMPO after 4 h were obtained to be 0.048, 0.111, 0.065, and 0.134, respectively. Furthermore, the synergistic effect of these inhibitors was investigated experimentally, indicating that DTMBP/4-hydroxy-TEMPO exerted the best synergistic effects on the inhibition of polymerization. The optimum inhibition effect was observed at the blend of 4-hydroxy-TEMPO (25 wt.%) and DTMBP (75 wt.%,) corresponding to 6.8% polymer growth after 4 h.

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Review of moisture behavior and thermal performance of polystyrene insulation in building applications

Cited by 84 publications

References 23 publications

The Numerical and Experimental Investigation of the Change of the Thermal Conductivity of Expanded Polystyrene at Different Temperatures and Densities

The Numerical and Experimental Investigation of the Change of the Thermal Conductivity of Expanded Polystyrene at Different Temperatures and Densities

Experimental Studies Involving the Impact of Solar Radiation on the Properties of Expanded Graphite Polystyrene

A Theoretical and Experimental Study for Screening Inhibitors for Styrene Polymerization

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