Dynamic Mechanical Analysis of Synthetic epoxy (E) and Bio-epoxy Polymer Foam Integrated with Wood Filler Under 8000 hours Exposure to UV Irradiation
The most common sustainable solution for polyurethane (PU) materials is their production using renewable resources reducing the dependency on the consumption of petroleum-based oil products. This research presents results from an experimental study on the dynamic mechanical and viscoelastic properties such as storage modulus, E', loss modulus, E'' and damping coefficient, tan δ of syntactic epoxy (E) and bio-epoxy polymer foam loading with different ratio of flakes and powder filler 0, 5, 10, 15 and 20 %wt after exposed to UV irradiation for 8000 h. Dynamic mechanical analysis (DMA) of the blended were performed over a temperature range of 25–180°C for (E) and (B) polymer foam under frequency of 1 Hz. The results demonstrated that the E20L specimen with the highest filler ratio gives the maximum storage modulus and loss modulus value (0.3125 MPa), (0.0625 MPa) respectively among other filler ratio due to bonding between foam and filler resulting in increased viscosity of the synthetic-epoxy PUs foam. Among others, the bio-epoxy PUs foam (B5P) has the highest storage value (3.956 MPa) and loss modulus (17.213 MPa) indicating that bio-epoxy PU foams can dissipate energy faster than synthetic-epoxy polymer foams. TG analysis showed that the synthetic epoxy (E) polymer foam had higher Tg value and E5L (1.2) archived the highest value compared to the bio-epoxy foams which had much less repeatable results due to the less homogeneous structure of polyols.compulsory.