Piezoresistive and compression resistance relaxation behavior of water blown carbon nanotube/polyurethane composite foam
The in-situ bulk polycondensation process in combination with a ball milling dispersion process was used to prepare the water blown multiwall carbon nanotubes (CNT)/polyurethane (PU) composite foam. The mechanical properties, piezoresistive properties, strain sensitivity, stress and resistance relax...
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| Veröffentlicht in: | Composites. Part A, Applied science and manufacturing Applied science and manufacturing, 2015-05, Vol.72, p.108-114 |
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| container_title | Composites. Part A, Applied science and manufacturing |
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| creator | Zhai, Tianliang Li, Dongxu Fei, Guoxia Xia, Hesheng |
| description | The in-situ bulk polycondensation process in combination with a ball milling dispersion process was used to prepare the water blown multiwall carbon nanotubes (CNT)/polyurethane (PU) composite foam. The mechanical properties, piezoresistive properties, strain sensitivity, stress and resistance relaxation behaviors of the composite foams were investigated. The results show that the CNT/PU composite foam has a better compression strength than the unfilled polyurethane foams and a negative pressure coefficient behavior under uniaxial compression. The resistance response of CNT/PU nanocomposites foam under cyclic compressive loading was quite stable. The nanocomposite foam containing a weight fraction of carbon nanotubes close to the percolation threshold presents the largest strain sensitivity for the resistance. The characteristic of resistance relaxation of CNT/PU composite foam is different from the stress relaxation due to the different relaxation mechanism. During compressive stress relaxation, the CNT/PU foam composites have excellent resistance recoverability while poor stress recoverability. |
| doi_str_mv | 10.1016/j.compositesa.2015.02.003 |
| format | Article |
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The mechanical properties, piezoresistive properties, strain sensitivity, stress and resistance relaxation behaviors of the composite foams were investigated. The results show that the CNT/PU composite foam has a better compression strength than the unfilled polyurethane foams and a negative pressure coefficient behavior under uniaxial compression. The resistance response of CNT/PU nanocomposites foam under cyclic compressive loading was quite stable. The nanocomposite foam containing a weight fraction of carbon nanotubes close to the percolation threshold presents the largest strain sensitivity for the resistance. The characteristic of resistance relaxation of CNT/PU composite foam is different from the stress relaxation due to the different relaxation mechanism. During compressive stress relaxation, the CNT/PU foam composites have excellent resistance recoverability while poor stress recoverability.</description><identifier>ISSN: 1359-835X</identifier><identifier>EISSN: 1878-5840</identifier><identifier>DOI: 10.1016/j.compositesa.2015.02.003</identifier><language>eng</language><publisher>Elsevier Ltd</publisher><subject>A. Foams ; A. Polymer-matrix composites (PMCs) ; B. Electrical properties ; Carbon nanotubes ; Compressive strength ; Foams ; Plastic foam ; Polymer matrix composites ; Polyurethane foam ; Polyurethane resins ; Stress relaxation</subject><ispartof>Composites. 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Part A, Applied science and manufacturing</title><description>The in-situ bulk polycondensation process in combination with a ball milling dispersion process was used to prepare the water blown multiwall carbon nanotubes (CNT)/polyurethane (PU) composite foam. The mechanical properties, piezoresistive properties, strain sensitivity, stress and resistance relaxation behaviors of the composite foams were investigated. The results show that the CNT/PU composite foam has a better compression strength than the unfilled polyurethane foams and a negative pressure coefficient behavior under uniaxial compression. The resistance response of CNT/PU nanocomposites foam under cyclic compressive loading was quite stable. The nanocomposite foam containing a weight fraction of carbon nanotubes close to the percolation threshold presents the largest strain sensitivity for the resistance. The characteristic of resistance relaxation of CNT/PU composite foam is different from the stress relaxation due to the different relaxation mechanism. During compressive stress relaxation, the CNT/PU foam composites have excellent resistance recoverability while poor stress recoverability.</description><subject>A. Foams</subject><subject>A. Polymer-matrix composites (PMCs)</subject><subject>B. Electrical properties</subject><subject>Carbon nanotubes</subject><subject>Compressive strength</subject><subject>Foams</subject><subject>Plastic foam</subject><subject>Polymer matrix composites</subject><subject>Polyurethane foam</subject><subject>Polyurethane resins</subject><subject>Stress relaxation</subject><issn>1359-835X</issn><issn>1878-5840</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNqNkE1LxDAQhoMoqKv_Id68tOaj7bZHWfwCQQ8K3sJ0OsUs3WZNsuvHrzdlRTx6mmHed15mHsbOpMilkNXFMke3WrtgIwXIlZBlLlQuhN5jR7Ke11lZF2I_9bpsslqXL4fsOISlSA7dyCP28Wjpy3kKNkS7JQ5jx6fENAnWjXynwIiU2gE-IE7Tll5ha53nrufvEMnzdnDvI0fwbZJHGF3ctHSxdsPnxlN8hZH476G8d7A6YQc9DIFOf-qMPV9fPS1us_uHm7vF5X2GuixiVnZVVWAt561WGpD6ogRsFQnSdUGoOxBJVyhVi10lW9E0fQe6VyAQqwb1jJ3vctfevW0oRLOyAWkY0kluE4ycz4WqpVBNsjY7K3oXgqferL1dgf80UpiJtlmaP7TNRNsIZSaWM7bY7VL6ZWvJm4CWErbOesJoOmf_kfINs22ULw</recordid><startdate>20150501</startdate><enddate>20150501</enddate><creator>Zhai, Tianliang</creator><creator>Li, Dongxu</creator><creator>Fei, Guoxia</creator><creator>Xia, Hesheng</creator><general>Elsevier Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>JG9</scope></search><sort><creationdate>20150501</creationdate><title>Piezoresistive and compression resistance relaxation behavior of water blown carbon nanotube/polyurethane composite foam</title><author>Zhai, Tianliang ; Li, Dongxu ; Fei, Guoxia ; Xia, Hesheng</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c354t-5d664c817b323acef45acb2e0e384ec3da064c2c12bcd61b099fda3f2a0cc69c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>A. 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| ispartof | Composites. Part A, Applied science and manufacturing, 2015-05, Vol.72, p.108-114 |
| issn | 1359-835X 1878-5840 |
| language | eng |
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| source | Elsevier ScienceDirect Journals Complete |
| subjects | A. Foams A. Polymer-matrix composites (PMCs) B. Electrical properties Carbon nanotubes Compressive strength Foams Plastic foam Polymer matrix composites Polyurethane foam Polyurethane resins Stress relaxation |
| title | Piezoresistive and compression resistance relaxation behavior of water blown carbon nanotube/polyurethane composite foam |
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