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Composites of cysteamine functionalised graphene oxide and polypropylene
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Abbas, Syeda S. and McNally, Tony (2021) Composites of cysteamine functionalised graphene oxide and polypropylene. International Polymer Processing, 36 (3). pp. 297-313. doi:10.1515/ipp-2020-4079 ISSN 0930-777X.
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Official URL: https://doi.org/10.1515/ipp-2020-4079
Abstract
Cysteamine functionalised reduced graphene oxide (rGO) was grafted to polypropylene-graft-maleic anhydride (PP-g-MA) and subsequently melt blended with PP. The covalent bridging of rGO to PP-g-MA via the cysteamine molecule and co-crystallization are routes to promoting interfacial interactions between rGO and the PP matrix. A rheological percolation threshold was achieved for a nanofiller loading between 3 wt% and 5 wt%, but none detected for the composites prepared with un-functionalized rGO. At low loadings (0.1 wt%), functionalized rGO is well dispersed in the PP matrix, an interconnecting filler-filler, polymer-filler and polymer-polymer network is formed, resulting in increased tensile toughness (1 500%) and elongation at break (40%) relative to neat PP. Irrespective of whether the rGO was functionalised or not, it had a significant effect on the crystallization behavior of PP, inducing heterogeneous nucleation, increasing the crystallisation temperature (Tm) of PP by up to 10°C and decreasing the crystalline content (Xc) by ∼30% for the highest (5 wt%) filler loading. The growth of the monoclinic a-phase of PP is preferred on addition of functionalised rGO and b crystal growth suppressed.
| Item Type: | Journal Article | |||||||||
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| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TP Chemical technology |
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| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | |||||||||
| Library of Congress Subject Headings (LCSH): | Nanostructured materials, Graphene, Polypropylene, Polymers | |||||||||
| Journal or Publication Title: | International Polymer Processing | |||||||||
| Publisher: | De Gruyter | |||||||||
| ISSN: | 0930-777X | |||||||||
| Official Date: | 27 July 2021 | |||||||||
| Dates: |
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| Volume: | 36 | |||||||||
| Number: | 3 | |||||||||
| Page Range: | pp. 297-313 | |||||||||
| DOI: | 10.1515/ipp-2020-4079 | |||||||||
| Status: | Peer Reviewed | |||||||||
| Publication Status: | Published | |||||||||
| Access rights to Published version: | Open Access (Creative Commons) | |||||||||
| Date of first compliant deposit: | 19 May 2021 | |||||||||
| Date of first compliant Open Access: | 17 June 2022 | |||||||||
| RIOXX Funder/Project Grant: |
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