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In situester-amide exchange reaction between polyamide 6 and ethylene-vinyl acetate rubber during melt blending
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Wu, Wenjing, Wan, Chaoying, Zhang, Hongmei and Zhang, Yong (2014) In situester-amide exchange reaction between polyamide 6 and ethylene-vinyl acetate rubber during melt blending. Journal of Applied Polymer Science, Volume 131 (Number 10). Article number 40272. doi:10.1002/app.40272 ISSN 0021-8995.
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Official URL: http://dx.doi.org/10.1002/app.40272
Abstract
The ester–amide exchange reaction between polyamide 6 (PA6) and ethylene-vinyl acetate rubber (EVM) with dibutyltin oxide (DBTO) as a catalyst took place during melt blending, leading to the formation of PA6-grafted EVM copolymer (EVM-g-PA6) and acetamide-terminated PA6. The exchange reaction extent, expressed by the percentage content of the acetate groups taking part in the exchange reaction, was 5.9 mol %, and the yield of EVM-g-PA6 copolymer was 6.8 wt % for PA6/EVM/DBTO (60/40/1) blend at 230°C for 60 min. The number-average molecular weight of PA6 branches in EVM-g-PA6 was ∼278 g/mol as evaluated from nuclear magnetic resonance spectra. The reaction kinetic parameters were calculated according to a second-order reversible reaction mechanism. The rate constant was dependent on the catalyst concentration, PA6/EVM ratio, and shearing conditions. In this article, the characterized ester–amide exchange reaction between PA6 and EVM will guide the fabrication of novel EVM-based graft copolymers and high-performance PA6/EVM thermoplastic elastomers for engineering applications.
Item Type: | Journal Article | ||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||||
Journal or Publication Title: | Journal of Applied Polymer Science | ||||||||
Publisher: | John Wiley & Sons, Inc. | ||||||||
ISSN: | 0021-8995 | ||||||||
Official Date: | 14 February 2014 | ||||||||
Dates: |
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Volume: | Volume 131 | ||||||||
Number: | Number 10 | ||||||||
Article Number: | Article number 40272 | ||||||||
DOI: | 10.1002/app.40272 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
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