Does Styrofoam have a high thermal conductivity?
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| Papers (17) | Insight |
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| The results indicate that the thermal conductivity reduces by decreasing the cell size but there is an optimum foam density for achieving the smallest thermal conductivity. | |
| Among its many useful properties is its high thermal conductivity, which makes it advantageous for thermal management applications. | |
136 Citations | It was established that the thermal conductivity parallel to the stratification is more informative for petrophysical investigations than the thermal conductivity perpendicular to the layering. |
31 Citations | Our results are at variance with some literature that indicate a ‘strongly’ decreasing thermal conductivity above 3000°K or a ‘constant’ thermal conductivity with a ‘strong’ electronic conduction at up to 3300 °K. |
107 Citations | The thermoreflectance thermal conductivity values are in good agreement with the Wiedemann–Franz results for all the films at least 30 nm thick, indicating that our method can be used to estimate electrical conductivity along with thermal conductivity for sufficiently thick films. |
| We show that the high performance of these materials derives mainly from a low thermal conductivity. | |
350 Citations | The measured experimental thermal conductivity is supported by first-principles calculations, which suggest that the anisotropy in thermal conductivity is due to the differences of the speed of sound along different crystal directions. |
| The measurements show that both purity and thermal treatment strongly influence the value of thermal conductivity. | |
| The results indicate that the effective thermal conductivity increases with either the particle volume fraction or the conductivity ratio in general. | |
| At high temperatures, our results are at variance with some literature that indicate a ‘strongly’ decreasing thermal conductivity or an essentially ‘temperature independent’ thermal conductivity. | |
| Our findings provide hints for exploring new materials with low thermal conductivity. | |
| This could explain its relatively large values of thermal conductivity. | |
67 Citations | The experimental results show that the effective thermal conductivity increases as the temperature increases. |
47 Citations | The derived analytical expressions show that the effective thermal conductivity of the multilayered str... |
196 Citations | This model of diffuson-mediated thermal conductivity may thus help explain experimental results of ultralow thermal conductivity. |
| The predicted effective thermal conductivity agrees well with the experimental data. | |
| The results indicate that the thermal conductivity play a major role in all considered distributions. |
Related Questions
What is Styrofoam commonly used for?5 answersStyrofoam is commonly used for various purposes such as protective electronic devices, food packaging, craft materials, decoration, building materials, and manufacturing production equipment as packaging tools to absorb vibration during handling and transportation processes. It is lightweight, efficient, and can withstand temperatures, making it a widely used material. However, the disposal of styrofoam waste poses environmental pollution concerns. Efforts are being made to recycle styrofoam waste in order to reduce pollution and waste volume. Styrofoam has also been explored as a potential replacement for coarse aggregates in concrete, but further improvements are needed for structural applications. Additionally, styrofoam has been used in the design of fashion products and turbine blades for wind turbines.
How does styrofoam affect the environment?2 answersStyrofoam has negative effects on the environment. When burned, it releases toxic gases and smoke, causing air pollution and potential fire hazards. Additionally, waste styrofoam can contribute to environmental pollution due to difficulties in processing and disposal. However, there are methods being developed to address these issues. For example, a method for manufacturing an environment-friendly incombustible insulation board using waste styrofoam has been proposed, which is biodegradable and does not cause environmental pollution when buried in the ground. Furthermore, there are machines available that can process styrofoam waste by cutting and separating foreign materials, allowing for recycling and reducing waste. These advancements aim to mitigate the negative impact of styrofoam on the environment.
What are the thermal characteristics of polystyrene using a thermogravimetric Analysis?2 answersThe thermal characteristics of polystyrene were studied using thermogravimetric analysis (TGA). The study found that the thermal degradation of polystyrene occurred in a two-step process, with the degradation shifting to higher temperatures as the particle size increased. The activation energy of thermal degradation was higher for polystyrene composites compared to pure polystyrene. The kinetic parameters of the thermal decomposition of polystyrene were found to be dependent on the molecular weight, with higher molecular weights resulting in higher activation energies. The decomposition patterns of polystyrene followed a first-order kinetic model. The maximum rate, average specific rate, and activation energy of decomposition increased up to a certain molecular weight and then leveled off. Overall, TGA analysis provided insights into the thermal behavior and decomposition kinetics of polystyrene.
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