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Reactive extrusion of biodegradable PGA/PBAT blends to enhance flexibility and gas barrier properties
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Ellingford, Christopher, Samantaray, Paresh Kumar, Farris, Stefano, McNally, Tony, Tan, Bowen, Sun, Zhaoyang, Huang, Weijie, Ji, Yang and Wan, Chaoying (2022) Reactive extrusion of biodegradable PGA/PBAT blends to enhance flexibility and gas barrier properties. Journal of Applied Polymer Science, 139 (6). e51617. doi:10.1002/app.51617
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WRAP-reactive-extrusion-biodegradable-PGA-PBAT-blends-enhance-flexibility-gas-barrier-properties-2021.pdf - Accepted Version Embargoed item. Restricted access to Repository staff only until 4 September 2022. Contact author directly, specifying your specific needs. - Requires a PDF viewer. Download (1744Kb) |
Official URL: http://dx.doi.org/10.1002/app.51617
Abstract
Among commercial biodegradable polyesters, poly(glycolic acid) (PGA) has been rarely investigated for packaging applications, despite its unique advantages such as 100% compostability, high degree of crystallinity, high thermal stability and high gas barrier properties. The application of PGA has been limited by its mechanical brittleness, moisture sensitivity, and high melting temperature (~240 oC), restricting its processing and applications for film packaging. In this study, PGA was modified by blending with poly (butylene adipate-co-terephthalate) (PBAT) via melt-extrusion. A commercial terpolymer of ethylene, acrylic ester and glycidyl methacrylate (EMA-GMA) was selected for compatibilization. The phase morphology, rheology, thermal, mechanical and gas barrier properties of the blends were investigated. With addition of 20 wt. % EMA-GMA, the elongation of PGA/PBAT (50/50 wt. %) blends was improved from 10.7 to 145%, the oxygen permeability was reduced from 125 to 103 (cm3mm) / (m224h atm), and the water vapour barrier performance was improved by ~47%. The enhancement in ductility, oxygen and water vapor barrier properties of the flexible blends were ascribed to the interfacial bonding between PBAT and PGA enabled by EMA-GMA. The compatibilized PGA/PBAT blends with high thermal stability up to 300 oC are preferable for high temperature or hot food packaging.
| Item Type: | Journal Article | ||||||||
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| Subjects: | T Technology > TP Chemical technology T Technology > TS Manufactures |
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| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||||
| Library of Congress Subject Headings (LCSH): | Biodegradable plastics, Polyesters, Plastics in packaging, Flexure, Melt spinning | ||||||||
| Journal or Publication Title: | Journal of Applied Polymer Science | ||||||||
| Publisher: | John Wiley & Sons, Inc. | ||||||||
| ISSN: | 0021-8995 | ||||||||
| Official Date: | 10 February 2022 | ||||||||
| Dates: |
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| Volume: | 139 | ||||||||
| Number: | 6 | ||||||||
| Article Number: | e51617 | ||||||||
| DOI: | 10.1002/app.51617 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Reuse Statement (publisher, data, author rights): | This is the peer reviewed version of the following article: Ellingford, C., Samantaray, P. K., Farris, S., McNally, T., Tan, B., Sun, Z., Huang, W., Ji, Y., Wan, C., J. Appl. Polym. Sci. 2021, e51617. https://doi.org/10.1002/app.51617. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. | ||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||
| RIOXX Funder/Project Grant: |
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