Polymers from Renewable Resources. X. Semi-Interpenetrating Polymer Networks Based on Castor Oil Polyurethane and Cardanol-Furfural Resin: Scanning Electron Microscopy and XRD Studies

A number of semi-interpenetrating polymer networks (Semi-IPNs) were synthesized by reacting the polyurethane prepared from castor oil and diisocyanates and the resin prepared from cardanol and furfural. The physico-chemical properties of the semi-IPNs have been investigated. The scanning electron microscopy of some of the semi-IPNs have been studied and the morphology has been examined. The samples were subjected to wide angle X-ray diffraction analysis. The degree of crystallinity (Xcr) were computed on the basis of crystal defect concept developed by Roland and Vonk.