Nucleation and mechanical enhancements in polyethylene-graphene nanoplate composites.
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| Title: | Nucleation and mechanical enhancements in polyethylene-graphene nanoplate composites. |
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| Authors: | Bourque, Alexander J.1,2 ajules29@mit.edu, Locker, C. Rebecca1, Tsou, Andy H.3, Vadlamudi, Madhavi1 |
| Source: | Polymer. Sep2016, Vol. 99, p263-272. 10p. |
| Subjects: | Mechanical behavior of materials, Polyethylene, Nanocomposite materials, Crystallization, Graphene, Thermal stability |
| Abstract: | Graphene nanoplatelets (GNP) dispersed in high-density polyethylene (HDPE) were found to significantly enhance nucleation of PE crystallization, and thermal/mechanical properties of HDPE-GNP nanocomposites. Excellent dispersion of GNPs was achieved by combining solution blending and twin-screw extrusion homogenization. The dispersion state was confirmed by bimodal AFM and also by the resulting improvements in thermal, mechanical, and transport properties. The crystallization rates were shown to markedly increase at low GNP content (0.1 wt%) and continued to increase with GNP loading up to 15 wt%. The size of secondary structures, or spherulites, decreased with GNP loading. Smaller spherulite sizes and faster kinetics suggested enhanced nucleation with GNP addition. 30–40% reductions in permeability and up to 60% higher Young’s moduli were found in these HDPE-GNP nanocomposites. Restricted polyethylene mobility and enhanced thermal stability with increasing GNP loading were also indicated in these HDPE-GNP nanocomposites. [ABSTRACT FROM AUTHOR] |
| Copyright of Polymer is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Items | – Name: Title Label: Title Group: Ti Data: Nucleation and mechanical enhancements in polyethylene-graphene nanoplate composites. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Bourque%2C+Alexander+J%2E%22">Bourque, Alexander J.</searchLink><relatesTo>1,2</relatesTo><i> ajules29@mit.edu</i><br /><searchLink fieldCode="AR" term="%22Locker%2C+C%2E+Rebecca%22">Locker, C. Rebecca</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Tsou%2C+Andy+H%2E%22">Tsou, Andy H.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Vadlamudi%2C+Madhavi%22">Vadlamudi, Madhavi</searchLink><relatesTo>1</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Polymer%22">Polymer</searchLink>. Sep2016, Vol. 99, p263-272. 10p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Mechanical+behavior+of+materials%22">Mechanical behavior of materials</searchLink><br /><searchLink fieldCode="DE" term="%22Polyethylene%22">Polyethylene</searchLink><br /><searchLink fieldCode="DE" term="%22Nanocomposite+materials%22">Nanocomposite materials</searchLink><br /><searchLink fieldCode="DE" term="%22Crystallization%22">Crystallization</searchLink><br /><searchLink fieldCode="DE" term="%22Graphene%22">Graphene</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+stability%22">Thermal stability</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Graphene nanoplatelets (GNP) dispersed in high-density polyethylene (HDPE) were found to significantly enhance nucleation of PE crystallization, and thermal/mechanical properties of HDPE-GNP nanocomposites. Excellent dispersion of GNPs was achieved by combining solution blending and twin-screw extrusion homogenization. The dispersion state was confirmed by bimodal AFM and also by the resulting improvements in thermal, mechanical, and transport properties. The crystallization rates were shown to markedly increase at low GNP content (0.1 wt%) and continued to increase with GNP loading up to 15 wt%. The size of secondary structures, or spherulites, decreased with GNP loading. Smaller spherulite sizes and faster kinetics suggested enhanced nucleation with GNP addition. 30–40% reductions in permeability and up to 60% higher Young’s moduli were found in these HDPE-GNP nanocomposites. Restricted polyethylene mobility and enhanced thermal stability with increasing GNP loading were also indicated in these HDPE-GNP nanocomposites. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Polymer is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.polymer.2016.07.025 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 10 StartPage: 263 Subjects: – SubjectFull: Mechanical behavior of materials Type: general – SubjectFull: Polyethylene Type: general – SubjectFull: Nanocomposite materials Type: general – SubjectFull: Crystallization Type: general – SubjectFull: Graphene Type: general – SubjectFull: Thermal stability Type: general Titles: – TitleFull: Nucleation and mechanical enhancements in polyethylene-graphene nanoplate composites. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Bourque, Alexander J. – PersonEntity: Name: NameFull: Locker, C. Rebecca – PersonEntity: Name: NameFull: Tsou, Andy H. – PersonEntity: Name: NameFull: Vadlamudi, Madhavi IsPartOfRelationships: – BibEntity: Dates: – D: 02 M: 09 Text: Sep2016 Type: published Y: 2016 Identifiers: – Type: issn-print Value: 00323861 Numbering: – Type: volume Value: 99 Titles: – TitleFull: Polymer Type: main |
| ResultId | 1 |
