Journal
POLYMERS
Volume 10, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/polym10040439
Keywords
cross-linking; thiol-Michael; soybean oil; bio-based polymer
Categories
Funding
- Research Council of Lithuania [S-LAT-17-2]
- MINECO (Ministerio de Economia, Industria y Competitividad) [MAT2017-82849-C2-1-R]
- AGAUR [2017-SGR-77]
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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.
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