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Data from: NIMS polymer database PoLyInfo (III): modularizing ShEx schemas...
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pngUpdated Sep 11, 2025
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EmailClick to copy linkLink copiedCiteKoichi Sakamoto; Masashi Ishii (2025). NIMS polymer database PoLyInfo (III): modularizing ShEx schemas for descriptors and properties in PoLyInfoRDF [Dataset]. http://doi.org/10.6084/m9.figshare.30104840.v1pngAvailable download formatsUnique identifierhttps://doi.org/10.6084/m9.figshare.30104840.v1Dataset updatedSep 11, 2025Dataset provided byTaylor & FrancisAuthorsKoichi Sakamoto; Masashi IshiiLicenseAttribution 4.0 (CC BY 4.0)https://creativecommons.org/licenses/by/4.0/
License information was derived automaticallyDescriptionPoLyInfo is a polymer database of the National Institute for Materials Science (NIMS) of Japan. In our previous work, to make the PoLyInfo data machine-readable and further machine-understandable, we built PoLyInfoRDF to store these data in the standard Resource Description Framework (RDF) format and then defined its schema in the Shape Expressions (ShEx) language. When designing the schema, it is important to modularize the schema such that the common components are reusable. This is the objective of this study and is essential for efficiently defining schemas of the descriptors and properties, which constitute the core of PoLyInfo, a large collection of experimentally measured polymer characteristics. As an example of modularization, descriptors of the source-based name and molecular formula both include a string value, hence their schemas may well share (‘inherit’) the schema for string values, which would be defined once and subsequently reused throughout the entire set of schemas. Actually we noticed a considerable amount of common portions among schemas of descriptors and properties, and clarified a ‘schema hierarchy’ to reflect the above ‘inheritance’ relationships, separately from the ontological ‘concept hierarchy’. We then investigated the extent to which the adapted strategy was able to successfully define the PoLyInfoRDF schema. Under this schema hierarchy, inheritance mechanisms in ShEx played a significant role in sharing common portions effectively in a well-organized manner. We expect future developments based on our approach to contribute to the standardization of scientific data representation in RDF by providing a library of reusable schemas.
GENEPI project ANR JCJC - Piezoelectric biobased polymers - Data set n°1 -...
- zenodo.org
Updated Apr 17, 2025ShareFacebookTwitterEmailClick to copy linkLink copiedCiteHui Shen; Sébastien Charlon; Sébastien Charlon; Cédric Samuel; Cédric Samuel; Hui Shen (2025). GENEPI project ANR JCJC - Piezoelectric biobased polymers - Data set n°1 - Role the oriented amorphous phase on piezoelectric properties of PLA [Dataset]. http://doi.org/10.5281/zenodo.15237061Unique identifierhttps://doi.org/10.5281/zenodo.15237061Dataset updatedApr 17, 2025AuthorsHui Shen; Sébastien Charlon; Sébastien Charlon; Cédric Samuel; Cédric Samuel; Hui ShenLicenseAttribution 4.0 (CC BY 4.0)https://creativecommons.org/licenses/by/4.0/
License information was derived automaticallyDescriptionGENEPI Project – Micro Energy Generators Based on Bio-Based and Piezoelectric Materials – Financed by ANR (French National Agency) under the JCJC program - Grant number ANR-21-CE06-003
The objective of the GENEPI project is to convert poly(L-lactide) (PLA), a bio-based thermoplastic material, into an efficient piezoelectric and ferroelectric material that can compete with traditional piezoelectric ceramics and fluorinated polymers, which have negative environmental impacts. GENEPI aims to advance scientific understanding of shear-mode piezoelectricity in PLA, particularly the relationships between processing, structure, and properties. Several challenges need to be addressed in terms of formulation, processing, and characterization of piezoelectric PLA. The CERI MP at IMT Nord Europe is specifically working on an extrusion-orientation process to manufacture piezoelectric PLA films, a process that is easily scalable for industrial use. To assess the potential of these PLA-based piezoelectric technologies, GENEPI also focuses on developing functional devices (mechanical sensors, vibration energy harvesters, and actuators). Additional innovative proof-of-concept devices are currently under development, such as piezoelectric effect-based chemical reactors.
Project Website: https://anr.fr/Projet-ANR-21-CE06-0003
Funding: French National Research Agency (ANR) – AAPG 2021 – CE06 “Polymers, composites, soft matter physics and chemistry, processes” – “Young Researchers” (JCJC) program
Principal Investigator: Cédric Samuel
Duration: 2022 – 2025
Data set n°1 - Role the oriented amorphous phase on piezoelectric properties of PLA - This dataset includes physico-chemical properties for oriented films made from PLA LX975 (amorphous grade of PLA). It includes extrusion conditions, MDO conditions, stretching / dimensional analysis, DSC, DMA, FTIR (non polarized and polarized) and shear piezoelectric properties. The related article "Unveiling the Amorphous Phase Contribution to Shear Piezoelectric of Polylactide" will be published soon.
The study highlights :
- Amorphous and piezoelectric PLA films were produced by extrusion followed by machine-direction orientation (MDO) using a specific PLA grade with D-content 12%.
- The orientation factor of PLA films is controlled by the draw ratio imposed during MDO in agreement with classical deformation theories of rubber networks.
- Shear piezoelectric properties up to 2 pC/N are detected with a linearly coupling to the orientation factor of PLA films.
- Based on recent structural models, the intrinsic piezoelectricity of the amorphous phase of PLA is estimated to 7 pC/N, a pioneer value in the scientific literature that help future optimization strategies.
- High draw rates imposed by MDO favor high orientation factors of PLA films and enhanced piezoelectric properties due to inactive chain relaxation phenomena in these conditions.
- The impact of the optical purity on the piezoelectric characteristics of the amorphous phase is low within commercial D-content ranges below 10 %.
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Attribution 4.0 (CC BY 4.0)https://creativecommons.org/licenses/by/4.0/
License information was derived automatically
PoLyInfo is a polymer database of the National Institute for Materials Science (NIMS) of Japan. In our previous work, to make the PoLyInfo data machine-readable and further machine-understandable, we built PoLyInfoRDF to store these data in the standard Resource Description Framework (RDF) format and then defined its schema in the Shape Expressions (ShEx) language. When designing the schema, it is important to modularize the schema such that the common components are reusable. This is the objective of this study and is essential for efficiently defining schemas of the descriptors and properties, which constitute the core of PoLyInfo, a large collection of experimentally measured polymer characteristics. As an example of modularization, descriptors of the source-based name and molecular formula both include a string value, hence their schemas may well share (‘inherit’) the schema for string values, which would be defined once and subsequently reused throughout the entire set of schemas. Actually we noticed a considerable amount of common portions among schemas of descriptors and properties, and clarified a ‘schema hierarchy’ to reflect the above ‘inheritance’ relationships, separately from the ontological ‘concept hierarchy’. We then investigated the extent to which the adapted strategy was able to successfully define the PoLyInfoRDF schema. Under this schema hierarchy, inheritance mechanisms in ShEx played a significant role in sharing common portions effectively in a well-organized manner. We expect future developments based on our approach to contribute to the standardization of scientific data representation in RDF by providing a library of reusable schemas.