TY  - EJOU
AU  - Sibaja, Bernal 
AU  - Matheus, Camila Pereira 
AU  - Mendez, Ricardo Ballestero 
AU  - Farag, Ramsis 
AU  - Vega-Baudrit, J. R. 
AU  - Auad, Maria L. 

TI  - Synthesis and Characterization of Interpenetrating Polymer Networks (IPNs) from Acrylated Soybean Oil a-Resorcylic Acid: Part 2. Thermo-Mechanical Properties and Linear Fracture Mechanics
T2  - Journal of Renewable Materials

PY  - 2017
VL  - 5
IS  - 3-4
SN  - 2164-6341

AB  - The thermo-mechanical properties and linear fracture mechanics of acrylated soybean oil and the triglycidylated ether of α-resorcylic acid interpenetrated networks as a function of their weight composition are the focus of Part 2 of this article. Thermo-mechanical characterization showed that the obtained materials behave as thermoset amorphous polymers, and that both the modulus and glass transition are extremely dependent on the epoxy/acrylate weight ratio. Modulus values ranged from 0.7 to 3.3 GPa at 30 °C, and glass transition temperatures ranged from around 58 °C to approx. 130 °C. No synergistic effect on these two properties was observed. Interpenetrating networks containing equivalent weight proportions of the parent resins showed the highest fracture toughness of the series, exhibiting a KIc value of around 2.1 MPa·m1/2. The results showed that the KIc values did not increase as Mc increased, which seems to suggest that a different mechanism is responsible for the increase in the fracture toughness displayed by IPNs. Also, there seems to be an exponential-type increase in the fracture energy with the Mc1/2 for the materials containing the epoxy phase.
KW  - Fracture toughness
KW  -  IPNs
KW  -  mechanical properties
KW  -  phenolic acids
KW  -  vegetable oils

DO  - 10.7569/JRM.2017.634114