Microcrystalline parameters of polyurethane/polymethyl methacrylate semi interpenetrating polymer networks by WAXS

A series of polyurethane (PU) and polymethyl methacrylate (PMMA) semi interpenetrating polymer networks (SIPNs) in the weight percent ratios of 90/10, 70/30, 60/40 and 50/50 were synthesized. The obtained SIPNs were characterized for physico-mechanical properties. Wide angle X-ray scattering studies (WAXS) were made to know microcrystalline parameters such as crystal size (〈N〉), lattice disorder (g), surface (Ds) and volume (DvDv) weighted crystal size of SIPNs. These parameters were expressed using exponential, lognormal and Reinhold asymmetric column length distribution functions and results are compared.