Mechanical and Thermal Properties of Functionally Graded Polyolefin Elastomer Foams
In this work, uniform and graded polyolefin elastomer (POE) foams were prepared using a single-step technology based on a fixed chemical blowing agent (azodicarbonamide) concentration of 4 phr (parts per hundred rubber). The effect of molding temperature, including the average temperature (<i>...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-10-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/14/19/4124 |
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| author | Ehsan Rostami-Tapeh-Esmaeil Sahar Shojaei Denis Rodrigue |
| author_facet | Ehsan Rostami-Tapeh-Esmaeil Sahar Shojaei Denis Rodrigue |
| author_sort | Ehsan Rostami-Tapeh-Esmaeil |
| collection | DOAJ |
| description | In this work, uniform and graded polyolefin elastomer (POE) foams were prepared using a single-step technology based on a fixed chemical blowing agent (azodicarbonamide) concentration of 4 phr (parts per hundred rubber). The effect of molding temperature, including the average temperature (<i>T<sub>avg</sub></i>) and temperature difference (Δ<i>T</i>), on the foams’ morphology, mechanical properties (tension, compression and hardness) and thermal conductivity was investigated. Two series of samples were produced by fixing <i>T<sub>avg</sub></i> with different Δ<i>T</i> or setting different Δ<i>T</i>, leading to different <i>T<sub>avg</sub></i>. The morphological analyses showed that two or three regions inside the foams were produced depending on the molding conditions, each region having different cellular structure in terms of cell size, cell density and cell geometry. The results obtained for the conditions tested showed a range of density (0.55–0.72 g/cm<sup>3</sup>), tensile modulus (0.44–0.70 MPa) and compression elastic modulus (0.35–0.71 MPa), with a thermal conductivity between 0.125 and 0.180 W/m.K. Based on the information provided, it can be concluded that the foam’s properties can be easily controlled by the cellular structure and that graded samples are more interesting than uniform ones, especially for thermal insulation applications, such as packaging, construction, transportation, automotive and aerospace industries. |
| first_indexed | 2024-03-09T21:15:35Z |
| format | Article |
| id | doaj.art-0efc8905b5ae426ca6ab9ed2b5c231a1 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T21:15:35Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-0efc8905b5ae426ca6ab9ed2b5c231a12023-11-23T21:34:41ZengMDPI AGPolymers2073-43602022-10-011419412410.3390/polym14194124Mechanical and Thermal Properties of Functionally Graded Polyolefin Elastomer FoamsEhsan Rostami-Tapeh-Esmaeil0Sahar Shojaei1Denis Rodrigue2Department of Chemical Engineering, Université Laval, Quebec, QC G1V 0A6, CanadaDepartment of Chemical Engineering, Université Laval, Quebec, QC G1V 0A6, CanadaDepartment of Chemical Engineering, Université Laval, Quebec, QC G1V 0A6, CanadaIn this work, uniform and graded polyolefin elastomer (POE) foams were prepared using a single-step technology based on a fixed chemical blowing agent (azodicarbonamide) concentration of 4 phr (parts per hundred rubber). The effect of molding temperature, including the average temperature (<i>T<sub>avg</sub></i>) and temperature difference (Δ<i>T</i>), on the foams’ morphology, mechanical properties (tension, compression and hardness) and thermal conductivity was investigated. Two series of samples were produced by fixing <i>T<sub>avg</sub></i> with different Δ<i>T</i> or setting different Δ<i>T</i>, leading to different <i>T<sub>avg</sub></i>. The morphological analyses showed that two or three regions inside the foams were produced depending on the molding conditions, each region having different cellular structure in terms of cell size, cell density and cell geometry. The results obtained for the conditions tested showed a range of density (0.55–0.72 g/cm<sup>3</sup>), tensile modulus (0.44–0.70 MPa) and compression elastic modulus (0.35–0.71 MPa), with a thermal conductivity between 0.125 and 0.180 W/m.K. Based on the information provided, it can be concluded that the foam’s properties can be easily controlled by the cellular structure and that graded samples are more interesting than uniform ones, especially for thermal insulation applications, such as packaging, construction, transportation, automotive and aerospace industries.https://www.mdpi.com/2073-4360/14/19/4124polyolefin elastomersgraded foamsmorphologymechanical propertiesthermal insulation |
| spellingShingle | Ehsan Rostami-Tapeh-Esmaeil Sahar Shojaei Denis Rodrigue Mechanical and Thermal Properties of Functionally Graded Polyolefin Elastomer Foams Polymers polyolefin elastomers graded foams morphology mechanical properties thermal insulation |
| title | Mechanical and Thermal Properties of Functionally Graded Polyolefin Elastomer Foams |
| title_full | Mechanical and Thermal Properties of Functionally Graded Polyolefin Elastomer Foams |
| title_fullStr | Mechanical and Thermal Properties of Functionally Graded Polyolefin Elastomer Foams |
| title_full_unstemmed | Mechanical and Thermal Properties of Functionally Graded Polyolefin Elastomer Foams |
| title_short | Mechanical and Thermal Properties of Functionally Graded Polyolefin Elastomer Foams |
| title_sort | mechanical and thermal properties of functionally graded polyolefin elastomer foams |
| topic | polyolefin elastomers graded foams morphology mechanical properties thermal insulation |
| url | https://www.mdpi.com/2073-4360/14/19/4124 |
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