期刊
JOURNAL OF APPLIED POLYMER SCIENCE
卷 138, 期 20, 页码 -出版社
WILEY
DOI: 10.1002/app.50417
关键词
biopolymers and renewable polymers; composites; glass transition; mechanical properties; thermosets
资金
- Engineering and Physical Sciences Research Council [EP/R513052/1]
- EPSRC [2149496] Funding Source: UKRI
Manufacturers are considering bio-based alternatives to petroleum-derived epoxies due to environmental concerns, but a lack of information hinders this substitution. Commercially available bio-based epoxy systems are being compared, with high bio-based content resins used for vacuum infusion composites, showing promising mechanical properties comparable to conventional epoxies.
Environmental concerns about fiber composites are leading manufacturers to consider bio-based alternatives to petroleum-derived epoxies. Such a substitution is hindered by a lack of information, so commercially available bio-based epoxy systems have been compared, their mechanical properties measured, and fiber composites produced by vacuum infusion. Most high bio-based content resins for infusion use conventional curing agents. Bio-based content is generally added using Epicerol, but also other bio-based precursors. A diglycidyl ether of bisphenol A system produced using Epicerol achieves 20 % bio-based content, but achieves higher contents when Epicerol is used in diluents. Fully bio-based monomers can be deleterious to the mechanical properties and glass transition temperature (T-g), so are used sparingly. The most-promising systems (28 % to 43 % bio-based) compare well to conventional epoxies, possessing good strength, stiffness, toughness, and a reasonable T-g. These partially bio-based epoxies offer an immediate lower-carbon alternative for vacuum-infused composites in marine, sports equipment, and wind energy.
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