The crosslinking of epoxidized sucrose esters of vegetable oil fatty acids with anhydrides was studied.  Sucrose esters of fatty acids (SEFAs) were epoxidized by peracetic acid generated in situ from hydrogen peroxide and acetic acid in the presence of an acidic ion exchange resin as catalyst. Crosslinked polyesters were prepared by curing epoxidized sucrose esters of fatty acids (ESEFAs) with 4-methyl-1,2-cyclohexanedicarboxylic anhydride (MCHDA), in the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) as curing catalyst. The mechanical properties of these thermosets were studied using tensile testing to determine Young's modulus, tensile stress, elongation at break and toughness. The dynamic mechanical properties were studied to determine the glass-transition temperature and the storage modulus in the rubbery plateau region. ESEFAs were used as the epoxy resins to prepare epoxy-anhydride coatings, and the properties of coatings were studied according to the ASTM methods. Commercial epoxidized soybean oil (ESO) was used as the control. Based on the comparison between ESO and ESEFAs, it observed that ESEFAs showed much better performance in mechanical and dynamic mechanical properties, as well as in the coating application. The advantages of ESEFAs in epoxy-anhydride curing were demonstrated in chemical and physical aspects, respectively.

Epoxy-anhydride curing of epoxidized sucrose esters of fatty acids

240th National Meeting (2010)

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