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. 2018 Nov 27;8:17409. doi: 10.1038/s41598-018-35663-2

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Effect of functionalization on nanocomposites based on DSC analysis and mathematical modeling. (a) Effect of filler loading on composite’s Tg in both non-functionalized BaSO₄/PLLA and functionalized SA-BaSO₄/PLLA. (b) Crystallinity of BaSO₄/PLLA and functionalized SA-BaSO₄/PLLA at different filler loading. * indicates a statistically different value of the SA-BaSO₄/PLLA compared to the BaSO₄/PLLA at the same filler loading, based on one-way ANOVA (p < 0.05). Error bar presents standard deviation. (c) Effect of SA functionalization on the reinforcing effect of the filler in BaSO₄/PLLA composites, based on Equation 4. (The results for 20% filler loadings were omitted for both systems due to the decrease in tensile strength which were unable to be represented accurately by the mathematical models).