Microstructure measurement and microgeometric packing characterization of rigid polyurethane foam defects
Streak and blister cell defects pose extensive surface problems for rigid polyurethane foams. In this study, these morphological anomalies were visually inspected using 2D optical techniques, and the cell microstructural coefficients including degree of anisotropy, cell circumdiameter, and the volum...
| Main Authors: | , , , , , |
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| Format: | Article |
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Smithers Rapra
2017
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| Online Access: | https://eprints.nottingham.ac.uk/41129/ |
| _version_ | 1848796202971168768 |
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| author | Xu, Jie Wu, Tao Zhang, Jianwei Chen, Hao Sun, Wei Peng, Chuang |
| author_facet | Xu, Jie Wu, Tao Zhang, Jianwei Chen, Hao Sun, Wei Peng, Chuang |
| author_sort | Xu, Jie |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Streak and blister cell defects pose extensive surface problems for rigid polyurethane foams. In this study, these morphological anomalies were visually inspected using 2D optical techniques, and the cell microstructural coefficients including degree of anisotropy, cell circumdiameter, and the volumetric isoperimetric quotient were calculated from the observations. A geometric regular polyhedron approximation method was developed based on relative density equations, in order to characterize the packing structures of both normal and anomalous cells. The reversely calculated cell volume constant, Cc, from polyhedron geometric voxels was compared with the empirical polyhedron cell volume value, Ch. The geometric relationship between actual cells and approximated polyhedrons was characterized by the defined volumetric isoperimetric quotient. Binary packing structures were derived from deviation comparisons between the two cell volume constants, and the assumed partial relative density ratios of the two individual packing polyhedrons. The modelling results show that normal cells have a similar packing to the Weaire-Phelan model, while anomalous cells have a dodecahedron/icosidodecahedron binary packing. |
| first_indexed | 2025-11-14T19:44:14Z |
| format | Article |
| id | nottingham-41129 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:44:14Z |
| publishDate | 2017 |
| publisher | Smithers Rapra |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-411292020-05-04T18:46:46Z https://eprints.nottingham.ac.uk/41129/ Microstructure measurement and microgeometric packing characterization of rigid polyurethane foam defects Xu, Jie Wu, Tao Zhang, Jianwei Chen, Hao Sun, Wei Peng, Chuang Streak and blister cell defects pose extensive surface problems for rigid polyurethane foams. In this study, these morphological anomalies were visually inspected using 2D optical techniques, and the cell microstructural coefficients including degree of anisotropy, cell circumdiameter, and the volumetric isoperimetric quotient were calculated from the observations. A geometric regular polyhedron approximation method was developed based on relative density equations, in order to characterize the packing structures of both normal and anomalous cells. The reversely calculated cell volume constant, Cc, from polyhedron geometric voxels was compared with the empirical polyhedron cell volume value, Ch. The geometric relationship between actual cells and approximated polyhedrons was characterized by the defined volumetric isoperimetric quotient. Binary packing structures were derived from deviation comparisons between the two cell volume constants, and the assumed partial relative density ratios of the two individual packing polyhedrons. The modelling results show that normal cells have a similar packing to the Weaire-Phelan model, while anomalous cells have a dodecahedron/icosidodecahedron binary packing. Smithers Rapra 2017-05-24 Article PeerReviewed Xu, Jie, Wu, Tao, Zhang, Jianwei, Chen, Hao, Sun, Wei and Peng, Chuang (2017) Microstructure measurement and microgeometric packing characterization of rigid polyurethane foam defects. Cellular Polymers, 36 (4). pp. 183-204. ISSN 0262-4893 Microstructure Microgeometry Relative density Polyhedrons Anisotropy Cell volume constant Isoperimetric quotient |
| spellingShingle | Microstructure Microgeometry Relative density Polyhedrons Anisotropy Cell volume constant Isoperimetric quotient Xu, Jie Wu, Tao Zhang, Jianwei Chen, Hao Sun, Wei Peng, Chuang Microstructure measurement and microgeometric packing characterization of rigid polyurethane foam defects |
| title | Microstructure measurement and microgeometric packing characterization of rigid polyurethane foam defects |
| title_full | Microstructure measurement and microgeometric packing characterization of rigid polyurethane foam defects |
| title_fullStr | Microstructure measurement and microgeometric packing characterization of rigid polyurethane foam defects |
| title_full_unstemmed | Microstructure measurement and microgeometric packing characterization of rigid polyurethane foam defects |
| title_short | Microstructure measurement and microgeometric packing characterization of rigid polyurethane foam defects |
| title_sort | microstructure measurement and microgeometric packing characterization of rigid polyurethane foam defects |
| topic | Microstructure Microgeometry Relative density Polyhedrons Anisotropy Cell volume constant Isoperimetric quotient |
| url | https://eprints.nottingham.ac.uk/41129/ |