Polymers from Renewable Resources XX Interpenetrating Polymer Networks (IPNs) Derived from Castor Oil-Hexamethylene Diisocyanate and Polyacrylamide

摘要

Several castor oil-based polyurethanes (PUs) samples were synthesized using hexamethylene diisocyanate (HMDI) with varying NCO/OH ratios. The PUs were reacted with acrylamide (AM) using an ethylene glycol dimethacrylate (EGDM) crosslinker and benzoyl peroxide as an initiator to get the (IPNs) . Themogravimetric analysis of the polymers was followed using a computer analysis method for assigning the kinetic mechanism. The degradation steps are discussed in the light of kinetic parameters. The scanning electronic microscopy of some of the interpenetrating polymer networks (IPNs) were studied and the morphology was examined. The samples were subjected to wide-angle X-ray diffraction analysis. Ruland and Vonk's method was used to calculate the degree of crystallinity.