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Graphene oxide as a covalent-crosslink agent for EVM-g-PA6 thermoplastic elastomeric nanocomposites
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Wu, Wenjing, Wan, Chaoying and Zhang, Yong (2015) Graphene oxide as a covalent-crosslink agent for EVM-g-PA6 thermoplastic elastomeric nanocomposites. RSC Advances , Volume 5 (Number 49). pp. 39042-39051. doi:10.1039/c5ra03660g ISSN 2046-2069.
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Official URL: http://dx.doi.org/10.1039/C5RA03660G
Abstract
A novel polyamide 6 grafted ethylene-vinyl acetate rubber copolymer (EVM-g-PA6) was synthesized in the presence of graphene oxide (GO). The reaction mechanisms of a sequential ring-opening polymerisation and ester–amide exchange reaction between caprolactam (CL) monomer and acetate groups of EVM with and without GO were proposed and investigated. Under the reaction conditions, the yield of the copolymer out of the CL/EVM (60/40) mixture was 26.4 wt% at 15% of the conversion of CL. The graft PA6 content was determined to be 4–6 wt%, and the grafting efficiency was further enhanced up to 13.1 wt% with the incorporation of 0.7 wt% of GO. This suggested that the GO accelerated the polymerization reaction of CL, and also acted as a crosslinking agent to bridge homopolymerised PA6 with EVM-g-PA6 copolymer. In addition, GO was thermally reduced in situ during the reaction process, thus significantly enhancing both the volume conductivity and permittivity of the copolymers. The flexibility and tensile strength of the EVM-g-PA6 copolymer were enhanced as compared to the corresponding EVM/PA6 blend. With the addition of 2.3 wt% of GO, the stress at 100% extension of the copolymer was enhanced by 190%, and Young's modulus was improved by 109%. The EVM-g-PA6 copolymer and the GO reinforced copolymeric nanocomposites could be developed to a new type of engineered thermoplastic elastomers.
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): | Elastomer, Thermoplastics , Polymeric composites | ||||||||||
Journal or Publication Title: | RSC Advances | ||||||||||
Publisher: | Royal Society of Chemistry | ||||||||||
ISSN: | 2046-2069 | ||||||||||
Official Date: | April 2015 | ||||||||||
Dates: |
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Volume: | Volume 5 | ||||||||||
Number: | Number 49 | ||||||||||
Page Range: | pp. 39042-39051 | ||||||||||
DOI: | 10.1039/c5ra03660g | ||||||||||
Status: | Peer Reviewed | ||||||||||
Publication Status: | Published | ||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||
Funder: | Guo jia zi ran ke xue ji jin wei yuan hui (China) [National Natural Science Foundation of China] (NSFC) | ||||||||||
Grant number: | 51073092 (NSFC) |
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