Effect of Graphene Nanofibers on the Morphological, Structural, Thermal, Phase Transitions and Mechanical Characteristics in Metallocene iPP Based Nanocomposites
Several nanocomposites were prepared by extrusion from a commercial metallocene-type isotactic polypropylene (iPP) and different amounts of two types of graphene (G) nanofibers: ones with a high specific surface, named GHS, and the others with a low specific surface, labeled as GLS. The number of gr...
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MDPI AG
2022-06-01
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| Series: | Journal of Composites Science |
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| Online Access: | https://www.mdpi.com/2504-477X/6/6/161 |
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| author | Sandra Novo Carmen Fonseca Rosario Benavente Enrique Blázquez-Blázquez María L. Cerrada Ernesto Pérez |
| author_facet | Sandra Novo Carmen Fonseca Rosario Benavente Enrique Blázquez-Blázquez María L. Cerrada Ernesto Pérez |
| author_sort | Sandra Novo |
| collection | DOAJ |
| description | Several nanocomposites were prepared by extrusion from a commercial metallocene-type isotactic polypropylene (iPP) and different amounts of two types of graphene (G) nanofibers: ones with a high specific surface, named GHS, and the others with a low specific surface, labeled as GLS. The number of graphene layers was found to be around eight for GLS and about five in the GHS. Scanning electron microscopy (SEM) images of the resultant iPP nanocomposites showed a better homogeneity in the dispersion of the GLS nanofibers within the polymeric matrix compared with the distribution observed for the GHS ones. Crystallinity in the nanocomposites turned out to be dependent upon graphene content and upon thermal treatment applied during film preparation, the effect of the nature of the nanofiber being negligible. Graphene exerted a noticeable nucleating effect in the iPP crystallization. Furthermore, thermal stability was enlarged, shifting to higher temperatures, with increasing nanofiber amount. The mechanical response changed significantly with nanofiber type, along with its content, together with the thermal treatment applied to the nanocomposites. Features of nanofiber surface played a key role in the ultimate properties related to superficial and bulk stiffness. |
| first_indexed | 2024-03-09T23:25:00Z |
| format | Article |
| id | doaj.art-06aa263b4bec4bba80be151da7b0d606 |
| institution | Directory Open Access Journal |
| issn | 2504-477X |
| language | English |
| last_indexed | 2024-03-09T23:25:00Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Composites Science |
| spelling | doaj.art-06aa263b4bec4bba80be151da7b0d6062023-11-23T17:18:28ZengMDPI AGJournal of Composites Science2504-477X2022-06-016616110.3390/jcs6060161Effect of Graphene Nanofibers on the Morphological, Structural, Thermal, Phase Transitions and Mechanical Characteristics in Metallocene iPP Based NanocompositesSandra Novo0Carmen Fonseca1Rosario Benavente2Enrique Blázquez-Blázquez3María L. Cerrada4Ernesto Pérez5Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), Juan de la Cierva 3, 28006 Madrid, SpainMechanical Engineering, Chemistry and Industrial Design Department, Escuela Técnica Superior de Ingeniería y Diseño Industrial, Universidad Politécnica de Madrid (ETSIDI-UPM), Ronda de Valencia 3, 28012 Madrid, SpainInstituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), Juan de la Cierva 3, 28006 Madrid, SpainInstituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), Juan de la Cierva 3, 28006 Madrid, SpainInstituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), Juan de la Cierva 3, 28006 Madrid, SpainInstituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), Juan de la Cierva 3, 28006 Madrid, SpainSeveral nanocomposites were prepared by extrusion from a commercial metallocene-type isotactic polypropylene (iPP) and different amounts of two types of graphene (G) nanofibers: ones with a high specific surface, named GHS, and the others with a low specific surface, labeled as GLS. The number of graphene layers was found to be around eight for GLS and about five in the GHS. Scanning electron microscopy (SEM) images of the resultant iPP nanocomposites showed a better homogeneity in the dispersion of the GLS nanofibers within the polymeric matrix compared with the distribution observed for the GHS ones. Crystallinity in the nanocomposites turned out to be dependent upon graphene content and upon thermal treatment applied during film preparation, the effect of the nature of the nanofiber being negligible. Graphene exerted a noticeable nucleating effect in the iPP crystallization. Furthermore, thermal stability was enlarged, shifting to higher temperatures, with increasing nanofiber amount. The mechanical response changed significantly with nanofiber type, along with its content, together with the thermal treatment applied to the nanocomposites. Features of nanofiber surface played a key role in the ultimate properties related to superficial and bulk stiffness.https://www.mdpi.com/2504-477X/6/6/161metallocene iPPgraphene nanofibersnanocompositescrystalline latticenucleating effectphase transitions |
| spellingShingle | Sandra Novo Carmen Fonseca Rosario Benavente Enrique Blázquez-Blázquez María L. Cerrada Ernesto Pérez Effect of Graphene Nanofibers on the Morphological, Structural, Thermal, Phase Transitions and Mechanical Characteristics in Metallocene iPP Based Nanocomposites Journal of Composites Science metallocene iPP graphene nanofibers nanocomposites crystalline lattice nucleating effect phase transitions |
| title | Effect of Graphene Nanofibers on the Morphological, Structural, Thermal, Phase Transitions and Mechanical Characteristics in Metallocene iPP Based Nanocomposites |
| title_full | Effect of Graphene Nanofibers on the Morphological, Structural, Thermal, Phase Transitions and Mechanical Characteristics in Metallocene iPP Based Nanocomposites |
| title_fullStr | Effect of Graphene Nanofibers on the Morphological, Structural, Thermal, Phase Transitions and Mechanical Characteristics in Metallocene iPP Based Nanocomposites |
| title_full_unstemmed | Effect of Graphene Nanofibers on the Morphological, Structural, Thermal, Phase Transitions and Mechanical Characteristics in Metallocene iPP Based Nanocomposites |
| title_short | Effect of Graphene Nanofibers on the Morphological, Structural, Thermal, Phase Transitions and Mechanical Characteristics in Metallocene iPP Based Nanocomposites |
| title_sort | effect of graphene nanofibers on the morphological structural thermal phase transitions and mechanical characteristics in metallocene ipp based nanocomposites |
| topic | metallocene iPP graphene nanofibers nanocomposites crystalline lattice nucleating effect phase transitions |
| url | https://www.mdpi.com/2504-477X/6/6/161 |
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