Abstract
Spirulina Platensis (SP) reinforced semi-interpenetrating polymer networks (S-IPN) were developed using unsaturated polyester (USP) and polyurethane (PU). The concentrations of SP were varied in the polymer matrix. Characterization of the polymer matrix has been carried out using Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). Identified urethane linkages decreased with increase in SP content. Thermal stability, swelling behavior, water absorption, all increased with an increase in SP content. The biocomposites showed good chemical resistance.