The effects of weathering exposure on the physical, mechanical, and thermal properties of high-density polyethylene and poly (vinyl chloride)
This paper presents results describing the physical, mechanical, and thermal properties (melt flow index - MFI and oxidative induction time - OIT) of high density polyethylene and poly (vinyl chloride) after weathering exposure (6, 12, 18, and 30 months). The materials exposed were geomembranes of t...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
2013-08-01
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| Series: | Materials Research |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000600016&tlng=en |
| _version_ | 1818719712412958720 |
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| author | Paulo César Lodi Benedito de Souza Bueno Orencio Monje Vilar |
| author_facet | Paulo César Lodi Benedito de Souza Bueno Orencio Monje Vilar |
| author_sort | Paulo César Lodi |
| collection | DOAJ |
| description | This paper presents results describing the physical, mechanical, and thermal properties (melt flow index - MFI and oxidative induction time - OIT) of high density polyethylene and poly (vinyl chloride) after weathering exposure (6, 12, 18, and 30 months). The materials exposed were geomembranes of two thicknesses: 1.0 and 2.0 mm (PVC) and 0.8 and 2.5 mm (HDPE). The climate parameters (average) obtained were 25 ºC (temperature), 93 mm (precipitation), 66% (relative humidity), and 19 MJ/m².day (intensity of global radiation). Some results showed, for instance, that the behavior of the geomembranes changed after the exposures. A few minor variations in physical properties occurred. The density and thickness, for instance, varied 0.5-1.0% (average) for both the PVC and HDPE geomembranes. The mechanical properties changed as a function of the period of exposure. In general, some decreases were verified by the deformation of PVC. The samples became more rigid. In contrast, HDPE geomembranes became more ductile. Despite the variations in elasticity, some increases in deformability were verified. An MFI test showed some degradation in HDPE geomembranes. OIT tests revealed small values for both intact and exposed samples. |
| first_indexed | 2024-12-17T20:11:18Z |
| format | Article |
| id | doaj.art-c8cba37e7b9e4932908c2b5af74431ee |
| institution | Directory Open Access Journal |
| issn | 1516-1439 |
| language | English |
| last_indexed | 2024-12-17T20:11:18Z |
| publishDate | 2013-08-01 |
| publisher | Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol) |
| record_format | Article |
| series | Materials Research |
| spelling | doaj.art-c8cba37e7b9e4932908c2b5af74431ee2022-12-21T21:34:13ZengAssociação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)Materials Research1516-14392013-08-011661331133510.1590/S1516-14392013005000137The effects of weathering exposure on the physical, mechanical, and thermal properties of high-density polyethylene and poly (vinyl chloride)Paulo César Lodi0Benedito de Souza Bueno1Orencio Monje Vilar2Universidade Estadual PaulistaUniversidade de São PauloUniversidade de São PauloThis paper presents results describing the physical, mechanical, and thermal properties (melt flow index - MFI and oxidative induction time - OIT) of high density polyethylene and poly (vinyl chloride) after weathering exposure (6, 12, 18, and 30 months). The materials exposed were geomembranes of two thicknesses: 1.0 and 2.0 mm (PVC) and 0.8 and 2.5 mm (HDPE). The climate parameters (average) obtained were 25 ºC (temperature), 93 mm (precipitation), 66% (relative humidity), and 19 MJ/m².day (intensity of global radiation). Some results showed, for instance, that the behavior of the geomembranes changed after the exposures. A few minor variations in physical properties occurred. The density and thickness, for instance, varied 0.5-1.0% (average) for both the PVC and HDPE geomembranes. The mechanical properties changed as a function of the period of exposure. In general, some decreases were verified by the deformation of PVC. The samples became more rigid. In contrast, HDPE geomembranes became more ductile. Despite the variations in elasticity, some increases in deformability were verified. An MFI test showed some degradation in HDPE geomembranes. OIT tests revealed small values for both intact and exposed samples.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000600016&tlng=enHDPE and PVC geomembranesweathering exposurephysical and mechanical propertiesoxidative degradation |
| spellingShingle | Paulo César Lodi Benedito de Souza Bueno Orencio Monje Vilar The effects of weathering exposure on the physical, mechanical, and thermal properties of high-density polyethylene and poly (vinyl chloride) Materials Research HDPE and PVC geomembranes weathering exposure physical and mechanical properties oxidative degradation |
| title | The effects of weathering exposure on the physical, mechanical, and thermal properties of high-density polyethylene and poly (vinyl chloride) |
| title_full | The effects of weathering exposure on the physical, mechanical, and thermal properties of high-density polyethylene and poly (vinyl chloride) |
| title_fullStr | The effects of weathering exposure on the physical, mechanical, and thermal properties of high-density polyethylene and poly (vinyl chloride) |
| title_full_unstemmed | The effects of weathering exposure on the physical, mechanical, and thermal properties of high-density polyethylene and poly (vinyl chloride) |
| title_short | The effects of weathering exposure on the physical, mechanical, and thermal properties of high-density polyethylene and poly (vinyl chloride) |
| title_sort | effects of weathering exposure on the physical mechanical and thermal properties of high density polyethylene and poly vinyl chloride |
| topic | HDPE and PVC geomembranes weathering exposure physical and mechanical properties oxidative degradation |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000600016&tlng=en |
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