Improving and predicting the mechanical properties of foamed and stretched composite poly(lactic acid) films
Foamed poly(lactic acid) films reinforced with micro-crystalline cellulose (MCC), were uniaxially stretched to different ratios. At 10% (weight) loading MCC particles gave an approximately 3.5 times improvement in stiffness over unreinforced foams. X-ray tomography and image analysis showed that mos...
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| Format: | Article |
| Language: | English |
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Budapest University of Technology and Economics
2019-01-01
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| Series: | eXPRESS Polymer Letters |
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| Online Access: | http://www.expresspolymlett.com/letolt.php?file=EPL-0009316&mi=cd |
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| author | S. Hussain A. R. Dickson |
| author_facet | S. Hussain A. R. Dickson |
| author_sort | S. Hussain |
| collection | DOAJ |
| description | Foamed poly(lactic acid) films reinforced with micro-crystalline cellulose (MCC), were uniaxially stretched to different ratios. At 10% (weight) loading MCC particles gave an approximately 3.5 times improvement in stiffness over unreinforced foams. X-ray tomography and image analysis showed that most MCC particles had low aspect ratios, were randomly oriented and well distributed. Stretching did not change the orientation of the MCC particles. Increases in stiffness with stretching were due to the alignment of the foam cell walls. Electron microscopy and image analysis showed that the foam cells were elongated and the walls aligned in the stretch direction. There was a good fit between measured stiffness and micro-mechanical modelling based on a variation of the Mori-Tanaka model for reinforcing particles randomly oriented in 3 dimensions. |
| format | Article |
| id | doaj-art-54e0439b0a8b4492bcde58e005af14a1 |
| institution | Kabale University |
| issn | 1788-618X |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Budapest University of Technology and Economics |
| record_format | Article |
| series | eXPRESS Polymer Letters |
| spelling | doaj-art-54e0439b0a8b4492bcde58e005af14a12025-08-20T03:58:25ZengBudapest University of Technology and EconomicseXPRESS Polymer Letters1788-618X2019-01-01131182610.3144/expresspolymlett.2019.3Improving and predicting the mechanical properties of foamed and stretched composite poly(lactic acid) filmsS. HussainA. R. DicksonFoamed poly(lactic acid) films reinforced with micro-crystalline cellulose (MCC), were uniaxially stretched to different ratios. At 10% (weight) loading MCC particles gave an approximately 3.5 times improvement in stiffness over unreinforced foams. X-ray tomography and image analysis showed that most MCC particles had low aspect ratios, were randomly oriented and well distributed. Stretching did not change the orientation of the MCC particles. Increases in stiffness with stretching were due to the alignment of the foam cell walls. Electron microscopy and image analysis showed that the foam cells were elongated and the walls aligned in the stretch direction. There was a good fit between measured stiffness and micro-mechanical modelling based on a variation of the Mori-Tanaka model for reinforcing particles randomly oriented in 3 dimensions.http://www.expresspolymlett.com/letolt.php?file=EPL-0009316&mi=cdMechanical propertiesPLA foamX-ray tomographyReinforcementsModelling and simulation |
| spellingShingle | S. Hussain A. R. Dickson Improving and predicting the mechanical properties of foamed and stretched composite poly(lactic acid) films eXPRESS Polymer Letters Mechanical properties PLA foam X-ray tomography Reinforcements Modelling and simulation |
| title | Improving and predicting the mechanical properties of foamed and stretched composite poly(lactic acid) films |
| title_full | Improving and predicting the mechanical properties of foamed and stretched composite poly(lactic acid) films |
| title_fullStr | Improving and predicting the mechanical properties of foamed and stretched composite poly(lactic acid) films |
| title_full_unstemmed | Improving and predicting the mechanical properties of foamed and stretched composite poly(lactic acid) films |
| title_short | Improving and predicting the mechanical properties of foamed and stretched composite poly(lactic acid) films |
| title_sort | improving and predicting the mechanical properties of foamed and stretched composite poly lactic acid films |
| topic | Mechanical properties PLA foam X-ray tomography Reinforcements Modelling and simulation |
| url | http://www.expresspolymlett.com/letolt.php?file=EPL-0009316&mi=cd |
| work_keys_str_mv | AT shussain improvingandpredictingthemechanicalpropertiesoffoamedandstretchedcompositepolylacticacidfilms AT ardickson improvingandpredictingthemechanicalpropertiesoffoamedandstretchedcompositepolylacticacidfilms |