Synthesis and Characterization of Vegetable oil based Polyurethane derived from Biobased isocyanate

By : Swarnalata Sahoo, Hemjyoti Kalita, Smita Mohanty, S.K.Nayak

Page No: 601-613

Abstract
In the present work, biobased polyurethane (BPU) polymers at different NCO: OH molar ratio were synthesized using castor oil based polyol and palm oil derived partially biobased aliphatic isocyanate (PBAI) with and without catalyst. The curing time of BPUs was studied employing attenuated Fourier transform infrared spectroscopy (AT-FTIR). The glass transition temperature (Tg ) of the cured films of BPUs were evaluated using dynamic mechanical analysis (DMA) analysis. The higher glass transition temperature (Tg ) was observed in biobased polyurethane with catalyst (BPUW) as compared with biobased polyurethane without catalyst (BPUWT). Cross linking densities of the BPUs were calculated by utilizing kinetic theory of rubber elasticity and found be higher in presence of catalyst. Further, the surface properties were studied using contact angle measurement.

Authors :
Swarnalata Sahoo, Hemjyoti Kalita, Smita Mohanty and S.K.Nayak : Central Institute of Plastic Engineering and Technology (CIPET), Chennai, Tamilnadu,600032