Interpenetrating polymer network structured thermosets prepared from epoxidized soybean oil/diglycidyl ether of bisphenol A

Epoxidized soybean oil (ESO)/diglycidyl ether of bisphenol A (DGEBA) in various blend ratios (i.e. 100/0, 90/10, 80/20, 70/30, 60/40, 50/50) was thermally cured using methylhexahydrophthalic anhydride in the presence of 2‐ethyl‐4‐methylimidazole catalyst. The tensile properties and fracture toughnes...

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Bibliographic Details
Published in:Polymer international 2014-02, Vol.63 (2), p.273-279
Main Authors: Tan, Seah Guan, Ahmad, Zulkifli, Chow, Wen Shyang
Format: Article
Language:English
Subjects:
Applied sciences
Bisphenol A
Blending
Blends
Chemical properties
crosslink density
epoxidized soybean oil
epoxy
Ethers
Exact sciences and technology
Interpenetrating networks
mechanical properties
Polymer industry, paints, wood
Properties and testing
Soybeans
Technology of polymers
Thermal properties
Thermosetting resins
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Summary:Epoxidized soybean oil (ESO)/diglycidyl ether of bisphenol A (DGEBA) in various blend ratios (i.e. 100/0, 90/10, 80/20, 70/30, 60/40, 50/50) was thermally cured using methylhexahydrophthalic anhydride in the presence of 2‐ethyl‐4‐methylimidazole catalyst. The tensile properties and fracture toughness of the ESO/DGEBA thermoset blends were determined. Thermal properties of the blends were characterized using dynamic mechanical analysis, differential scanning calorimetry and thermogravimetric analysis. Blending of ESO and DGEBA gave synergistic effects on the modulus, strength, glass transition temperature and thermal stability. However, the fracture toughness and elongation at break of ESO/DGEBA blends are lower than those of ESO, as expected. The enhancement in certain mechanical and thermal properties of ESO/DGEBA can be associated with the crosslink density, gel content and possible interpenetrating network of the resulting thermoset blends. © 2013 Society of Chemical Industry Miscible ESO/DGEBA blends with a single glass transition temperature value were produced. Blending of ESO and DGEBA proved to be a good strategy to develop ESO thermoset with higher performance.
ISSN:0959-8103
1097-0126
DOI:10.1002/pi.4501