Effect of Selected Thiols on Cross-linking of Acrylated Epoxidized Soybean Oil and Properties of Resulting Polymers

Identificador:  imarina:5132043

Handle: https://hdl.handle.net/20.500.11797/imarina5132043

Autors:  Kasetaite, S; De la Flor, S; Serra, A; Ostrauskaite, J

Resum:
The effect of the chemical structure and functionality of three structurally different thiols on the cross-linking of acrylated epoxidized soybean oil and on the properties of the resulting polymers was investigated in this study. 1,3-Benzenedithiol, pentaerythritol tetra(3-mercaptopropionate), and an hexathiol synthesized from squalene were used in the cross-linking of acrylated epoxidized soybean oil by thiol¿Michael addition reaction. The reactivity of thiols determined from calorimetric curves followed the order: 1,3-benzenedithiol > pentaerythritol tetra(3-mercaptopropionate) > hexathiolated squalene. Thermal and mechanical properties and the swelling in different solvents of the cross-linked polymers were studied. The cross-linked polymer obtained from 1,3-benzenedithiol showed the highest swelling values in chloroform and toluene. The cross-linked polymer with pentaerythritol tetra(3-mercaptopropionate) fragments showed the best mechanical performance (highest mechanical strength and Young¿s modulus) and thermal stability. The cross-linked polymers from hexathiolated squalene showed the highest glass transition temperature.