Effect of gas saturation conditions on the expansion ratio of microcellular poly(lactic acid)/wood-flour composites
Poly(lactic acid) or PLA and PLA/wood-flour composites were microcellular foamed with CO2 through a batch foaming process. Specifically, the gas saturation pressure and time varied during processing to produce PLA foams with a high expansion ratio. A ten fold expansion ratio resulted in microcellula...
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| Format: | Article |
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| Language: | English |
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Budapest University of Technology and Economics
2010-10-01
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| Series: | eXPRESS Polymer Letters |
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| Online Access: | http://www.expresspolymlett.com/letolt.php?file=EPL-0001615&mi=cd |
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| collection | DOAJ |
| description | Poly(lactic acid) or PLA and PLA/wood-flour composites were microcellular foamed with CO2 through a batch foaming process. Specifically, the gas saturation pressure and time varied during processing to produce PLA foams with a high expansion ratio. A ten fold expansion ratio resulted in microcellular foamed PLA over unfoamed counterpart. The foaming conditions associated with such a high expansion ratio involved a lower gas saturation pressure up to 2.76 MPa, which corresponds to a critical gas concentration of approximately 9.4%. Beyond this critical value, foam expansion decreased significantly. Investigations also studied the effect of incorporating wood flour on the foamability of the resulting PLA/wood-flour composites. The addition of wood flour into the PLA matrix significantly affected the expansion ratio of PLA/wood-flour composite foams. |
| format | Article |
| id | doaj-art-c335eb26cf344d19986a1d33d18a595b |
| institution | DOAJ |
| issn | 1788-618X |
| language | English |
| publishDate | 2010-10-01 |
| publisher | Budapest University of Technology and Economics |
| record_format | Article |
| series | eXPRESS Polymer Letters |
| spelling | doaj-art-c335eb26cf344d19986a1d33d18a595b2025-08-20T03:20:30ZengBudapest University of Technology and EconomicseXPRESS Polymer Letters1788-618X2010-10-0141062163110.3144/expresspolymlett.2010.77Effect of gas saturation conditions on the expansion ratio of microcellular poly(lactic acid)/wood-flour compositesPoly(lactic acid) or PLA and PLA/wood-flour composites were microcellular foamed with CO2 through a batch foaming process. Specifically, the gas saturation pressure and time varied during processing to produce PLA foams with a high expansion ratio. A ten fold expansion ratio resulted in microcellular foamed PLA over unfoamed counterpart. The foaming conditions associated with such a high expansion ratio involved a lower gas saturation pressure up to 2.76 MPa, which corresponds to a critical gas concentration of approximately 9.4%. Beyond this critical value, foam expansion decreased significantly. Investigations also studied the effect of incorporating wood flour on the foamability of the resulting PLA/wood-flour composites. The addition of wood flour into the PLA matrix significantly affected the expansion ratio of PLA/wood-flour composite foams.http://www.expresspolymlett.com/letolt.php?file=EPL-0001615&mi=cdBiopolymers, biocompositesMicrocellular foamWood plastic compositesCell morphology |
| spellingShingle | Effect of gas saturation conditions on the expansion ratio of microcellular poly(lactic acid)/wood-flour composites eXPRESS Polymer Letters Biopolymers, biocomposites Microcellular foam Wood plastic composites Cell morphology |
| title | Effect of gas saturation conditions on the expansion ratio of microcellular poly(lactic acid)/wood-flour composites |
| title_full | Effect of gas saturation conditions on the expansion ratio of microcellular poly(lactic acid)/wood-flour composites |
| title_fullStr | Effect of gas saturation conditions on the expansion ratio of microcellular poly(lactic acid)/wood-flour composites |
| title_full_unstemmed | Effect of gas saturation conditions on the expansion ratio of microcellular poly(lactic acid)/wood-flour composites |
| title_short | Effect of gas saturation conditions on the expansion ratio of microcellular poly(lactic acid)/wood-flour composites |
| title_sort | effect of gas saturation conditions on the expansion ratio of microcellular poly lactic acid wood flour composites |
| topic | Biopolymers, biocomposites Microcellular foam Wood plastic composites Cell morphology |
| url | http://www.expresspolymlett.com/letolt.php?file=EPL-0001615&mi=cd |