Structure · dataset · 2018
Influence of clay surfactants polarity on the crystallization and rheological behavior of nanocomposites of PDLLA
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The effect of clay hydrophobicity on the cold crystallization and rheological properties of nanocomposites of poly(D,L-lactic acid) (PDLLA) was investigated.
Description
Crystallization was evaluated by DSC for isothermal and non-isothermal conditions. The clay modified with a hydrophilic surfactant acts as a nucleating agent, while the clay modified with a hydrophobic surfactant acts in an opposite way.
The Avrami and Ozawa parameters showed a three-dimensional spherulitic growth for all samples and the activation energy increased for the hydrophobic clay and decrease for the hydrophilic one. The equilibrium melting point for the PDLLA was found at 161ºC, being slightly altered as function of the surfactant polarity. The rheological behavior was investigated in terms of Isothermal Flow-Induced Crystallization and Structural Recovery.
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The hydrophobic clay showed to reduce the mobility of chains and retard the chain relaxation, which is attributed to the formation of a network, while the hydrophilic clay increased the chain mobility.
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- Repository landing page scielo.figshare.com/articles/Influence_of_clay_surfactants_polarity_on_the_crystal… ↗
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- DOI doi.org/10.6084/m9.figshare.7215860 ↗
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- Creative Commons Attribution 4.0 International creativecommons.org/licenses/by/4.0/legalcode ↗
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- IsSupplementTo 10.1590/1980-5373-mr-2018-0059 doi.org/10.1590/1980-5373-mr-2018-0059 ↗
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Topics
- Stated by source
- Chemical engineering · Materials engineering
- Inferred from text
- Materials engineering 73%
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Provenance · 1 source records, 11 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| DataCite | 10.6084/m9.figshare.7215860 | 12 d ago | JSON v1 |
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| concepts[field].anzsrc:group:4016 | enrichment · DataCite | taxonomy-embedding@1.1.0 | title+keywords+description (73%) |
| concepts[field].fos:chemical-engineering | source · DataCite | connector:datacite@1.0.0 | |
| concepts[field].fos:materials-engineering | source · DataCite | connector:datacite@1.0.0 | |
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