The frequency effects on fatigue threshold of PVC-M and PVC-U in air and water medium
The cyclic fatigue threshold value (�Kth) of PVC materials with (PVC-M) and without PVC-U) impact modifier was determined and compared in air and water environments. The PVCM specimens contain 6 pphr of chlorinated polyethylene (CPE) impact modifier. The testing was undertaken at a stress ratio of R...
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| Format: | Article |
| Language: | English |
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Trans Tech Publications Ltd., Switzerland
1998
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| Online Access: | http://irep.iium.edu.my/2836/1/advanced_mat.pdf |
| _version_ | 1825644354095546368 |
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| author | Samat, Noorasikin Whittle, Alan Hoffman, Mark |
| author_facet | Samat, Noorasikin Whittle, Alan Hoffman, Mark |
| author_sort | Samat, Noorasikin |
| collection | IIUM |
| description | The cyclic fatigue threshold value (�Kth) of PVC materials with (PVC-M) and without PVC-U) impact modifier was determined and compared in air and water environments. The PVCM specimens contain 6 pphr of chlorinated polyethylene (CPE) impact modifier. The testing was undertaken at a stress ratio of R=0.1 and fatigue threshold was evaluated at 3 different frequencies:1Hz, 7Hz and 20Hz. Frequency noticeably affected the fatigue threshold value; regardless of the testing environment; at low frequency the fatigue threshold of PVC-M was below PVC-U, however,this difference gradually decreased with increasing frequency as �Kth of PVC-M increased but �Kth of PVC-U remained constant. This trend was accelerated in water where a higher of fatigue
threshold, �Kth, was also observed. A lower fatigue threshold of PVC-M than PVC-U is associated with the presence of CPE particles. The absorption of water into the PVC matrix was evident with the formation of nodular structures observed on the fracture surface. The presence of the nodular structures (at regions close to the threshold) has retarded the fibrillation of crazes, which then blunted the crack propagation. |
| first_indexed | 2024-03-05T22:31:35Z |
| format | Article |
| id | oai:generic.eprints.org:2836 |
| institution | International Islamic University Malaysia |
| language | English |
| last_indexed | 2024-03-05T22:31:35Z |
| publishDate | 1998 |
| publisher | Trans Tech Publications Ltd., Switzerland |
| record_format | dspace |
| spelling | oai:generic.eprints.org:28362011-10-07T07:50:43Z http://irep.iium.edu.my/2836/ The frequency effects on fatigue threshold of PVC-M and PVC-U in air and water medium Samat, Noorasikin Whittle, Alan Hoffman, Mark TP1080 Polymers, plastics and their manufacture The cyclic fatigue threshold value (�Kth) of PVC materials with (PVC-M) and without PVC-U) impact modifier was determined and compared in air and water environments. The PVCM specimens contain 6 pphr of chlorinated polyethylene (CPE) impact modifier. The testing was undertaken at a stress ratio of R=0.1 and fatigue threshold was evaluated at 3 different frequencies:1Hz, 7Hz and 20Hz. Frequency noticeably affected the fatigue threshold value; regardless of the testing environment; at low frequency the fatigue threshold of PVC-M was below PVC-U, however,this difference gradually decreased with increasing frequency as �Kth of PVC-M increased but �Kth of PVC-U remained constant. This trend was accelerated in water where a higher of fatigue threshold, �Kth, was also observed. A lower fatigue threshold of PVC-M than PVC-U is associated with the presence of CPE particles. The absorption of water into the PVC matrix was evident with the formation of nodular structures observed on the fracture surface. The presence of the nodular structures (at regions close to the threshold) has retarded the fibrillation of crazes, which then blunted the crack propagation. Trans Tech Publications Ltd., Switzerland 1998-04 Article PeerReviewed application/pdf en http://irep.iium.edu.my/2836/1/advanced_mat.pdf Samat, Noorasikin and Whittle, Alan and Hoffman, Mark (1998) The frequency effects on fatigue threshold of PVC-M and PVC-U in air and water medium. Advanced Materials Research, 41-42. pp. 183-187. ISSN 1662-8985 http://www.scientific.net/AMR.41-42.183 10.4028/www.scientific.net/AMR.41-42.183 |
| spellingShingle | TP1080 Polymers, plastics and their manufacture Samat, Noorasikin Whittle, Alan Hoffman, Mark The frequency effects on fatigue threshold of PVC-M and PVC-U in air and water medium |
| title | The frequency effects on fatigue threshold of PVC-M and
PVC-U in air and water medium |
| title_full | The frequency effects on fatigue threshold of PVC-M and
PVC-U in air and water medium |
| title_fullStr | The frequency effects on fatigue threshold of PVC-M and
PVC-U in air and water medium |
| title_full_unstemmed | The frequency effects on fatigue threshold of PVC-M and
PVC-U in air and water medium |
| title_short | The frequency effects on fatigue threshold of PVC-M and
PVC-U in air and water medium |
| title_sort | frequency effects on fatigue threshold of pvc m and pvc u in air and water medium |
| topic | TP1080 Polymers, plastics and their manufacture |
| url | http://irep.iium.edu.my/2836/1/advanced_mat.pdf |
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