| DOI | Resolve DOI: https://doi.org/10.1002/app.41073 |
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| Author | Search for: Saeidlou, Sajjad; Search for: Huneault, Michel A.; Search for: Li, Hongbo1; Search for: Park, Chul B. |
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| Affiliation | - National Research Council of Canada. Automotive and Surface Transportation
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| Format | Text, Article |
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| Abstract | Poly(lactic acid) (PLA) stereocomplex formation in isothermal conditions in the absence and presence of a nucleating agent was studied from a rheological point of view due to sensitivity of viscoelastic properties to structural changes during this process. PDLA was melt blended in low concentrations with PLLA to produce a stereocomplex. Amorphous samples were prepared and crystallization was carried out in a rheometer at high temperatures to simulate melt processing conditions. Stereocomplexation was explored over time by measuring rheological parameters in small deformation oscillatory shear mode at a low frequency using parallel plate geometry. Kinetic data obtained by this means was compared to data from calorimetric studies, showing a different trend depending on the characterization method. Moreover, after the completion of crystallization, final crystalline structure was probed over a wide range of frequencies to investigate the rheological modification role of PDLA on PLLA major component. Differences in rheological characteristics of asymmetric PLLA/PDLA blends as compared to neat PLLA were associated to the structural changes happening because of the formation of the stereocomplex. |
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| Publication date | 2014-06-21 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 21275454 |
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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 | ab3a86d2-e750-43d6-9122-56d9b48c7c78 |
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| Record created | 2015-07-14 |
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| Record modified | 2020-04-22 |
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