Plasticized polylactide/clay nanocomposites. II. The effect of aging on structure and properties in relation to the filler content and the nature of its organo-modification
Abstract
Plasticized polylactide (PLA) – layered silicate nanocomposites were obtained by melt blending PLA with polyethylene glycol as plasticizer (20 wt %) and with different montmorillonite fillers: Cloisite® 20A, Cloisite® 25A, and Cloisite® 30B (from 1 to 10 wt %). Comparative samples of melt‐blended polylactide (without filler) and plasticized PLA with 20 wt % PEG were considered as well. Samples have been aged for 1 and 4 years and their chemical and physical characteristics were compared with not aged reference ones. It was found that molecular weight of the PLA decreased upon melt‐processing and aging, particularly when the Cloisite content increased, without a clear relation to the nature of the organo‐modifier. On the contrary, the PEG plasticizer was practically undegraded upon melt processing and aging. Structural studies revealed that plasticized PLA and plasticized PLA‐based nanocomposites are unstable in time of aging and undergo deplasticization. They showed, after aging, the presence of a thin PEG crystalline layer at the surface of the samples and improved the order in the PLA matrix to a higher extent in plasticized polylactide than in plasticized nanocomposite (due to clay stabilization effect). The amount of PEG diffusing toward sample surface was correlated with aging time, molecular weight of PLA matrix, and Cloisite® type, in clear relation to the extent of intercalation with PLA and PEG. Some modifications of the viscoelastic properties of PLA matrix, induced by the presence of both the nanoparticlate filler and the plasticizer, as well as a deterioration of the mechanical properties upon aging were observed. © 2005 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 44: 312–325, 2006
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PLA has good biocompatibility and degradability, which has led to its being widely used in the medical field.
“Polylactic acid has good biocompatibility and degradability, which has led to its being widely used in the medical field [40,70,71,72].”
From Synthesis and Biological Application of Polylactic Acid (2020) · cites this paper as [71]
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- Authors
- Pluta, M., Paul, M., Alexandre, M., & Dubois, P.
- Affiliations
- Centrum Badań Molekularnych i Makromolekularnych Polskiej Akademii Nauk (PL)
- University of Mons (BE)
- Corresponding author
- Pluta, Miroslaw
- Venue
- Journal of Polymer Science Part B: Polymer Physics
- Publisher
- Wiley
- Published
- 2005-11-29
- Volume
- 44
- Issue
- 2
- Pages
- 312-325
- ISSN
- 0887-6266 (ISSN-L)
- 1099-0488
- OpenAlex
- W2124776469
- Cited by
- 66
- References
- 21
- Citations by year
- 2025: 3 · 2024: 2 · 2023: 1 · 2022: 1 · 2021: 1 · 2020: 2 · 2019: 2 · 2018: 8 · 2017: 2 · 2016: 2 · 2015: 5 · 2014: 6 · 2013: 4 · 2012: 4
- FWCI
- 2.48
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Polymer Science Part B Polymer Physics (publishedVersion)
- ORBi UMONS (submittedVersion)
- Topics
- Physical Sciences › Materials Science › Polymers and Plastics › Polymer Nanocomposites and Properties
- Physical Sciences › Materials Science › Biomaterials › biodegradable polymer synthesis and properties
- Physical Sciences › Materials Science › Polymers and Plastics › Polymer Science and PVC
- Keywords
- clay nanocomposites, montmorillonite, cloisite, polyethylene glycol plasticizer, aging materials, molecular weight degradation, intercalation, clay stabilization, viscoelasticity, mechanical properties
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