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Experimental results show higher tensile strength and improved mechanical properties in UV-LED cured epoxy soybean oil films with varying carbon double bond functionality.
Over the past few decades, ultraviolet (UV) cured bio‐based resins have been widely applied in UV cured. However, most UV cured bio‐based resins are plagued by issues such as excessively high viscosity and poor mechanical properties. Epoxy soybean oil acrylate (AESO) is environmentally friendly. A series of AESOs with different contents of carbon–carbon double bonds functionality (from 2.28 to 4.32) were obtained through ring‐opening reactions using acrylic acid and Epoxy soybean oil (ESO). The photo curing resins were obtained by mixing AESO with hexanediol diacrylate (HDDA), dicyclopentadieneoxyethyl acrylate (DCPEA), and diphenyl (2,4, 6‐trimethylbenzoyl) phosphine oxide (TPO). The resins were rapidly cured under a 395 nm ultraviolet light‐emitting diode (UV‐LED) light source to form cured films. The cured film from AESO with functionality of 4.32 has good mechanical strength, with a tensile strength of 18.73 MPa and an elongation at break of 13.12%. The performance far exceeds that of the pure AESOcured film reported in the literature. This work provides a highly meaningful solution for the development of solvent‐free epoxy soybean oil‐based UV‐LED cured films.
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Zhang et al. (2026) studied this question.
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