| DOI | Resolve DOI: https://doi.org/10.1007/s10965-012-9827-3 |
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| Author | Search for: Liao, Xia1; Search for: Nawaby, Arghavan V.1 |
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| Affiliation | - National Research Council of Canada. NRC Institute for Chemical Process and Environmental Technology
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| Format | Text, Article |
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| Subject | Poly(L-lactic acid) (PLLA); CO2; Retrograde behavior; crystallization; foam morphology |
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| Abstract | The sorption behavior, physical properties, and foam morphologies in poly(L-lactic acid) (PLLA)-CO2 system were studied in this paper. The solubility and diffusion coefficient of CO2 in PLLA in the range of 0 °C to 45 °C and pressure up to 5.5 MPa were investigated. The diffusion coefficients were analyzed to determine the plasticization glass transition temperature (T g ) of the PLLA-CO2 systems. The data of T g s of PLLA at various CO2 pressures demonstrated that PLLA-CO2 system exhibited a retrograde vitrification behavior, which has never been reported on semi-crystalline polymer-gas system by systematic measurement of solubility data. The sorption curves of PLLA at certain temperatures and pressures exhibited a characteristic keen which indicated the rejection of CO2 from the polymer matrix due to CO2-induced crystallization. The fundamental understanding of PLLA-CO2 interactions was utilized to control the CO2 solubility and crystallinity in PLLA thus the physical properties, in order to develop various unique foam structures. |
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| Publication date | 2012-03-01 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Identifier | 9827 |
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| NPARC number | 21268391 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | cd9f5238-1bc6-4d40-8d2b-7152a442134d |
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| Record created | 2013-07-09 |
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| Record modified | 2020-04-21 |
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