Novel PVA/Methoxytrimethylsilane elastic composite membranes: preparation, characterization and DFT computation

摘要: Abstract A modified composite membranes (PVA/SiOH/SiOC) were made via solution-casting process using different 1:1, 1:2, 1:3 and 1:4 volume ratios of polyvinyl alcohol (PVA):methoxytrimethylsilane (MTMS). Moreover, FT-infrared energy-dispersive X-ray spectroscopy (EDX) mesured to account for the network structural rearrangements involving silicon within PVA matrices. The addition MTMS has improved thermal mechanical properties as compared pristine PVA. In addition, crystallinity morphological changes PVA/MTMS composites was studied diffraction (XRD) scanning electron microscope (SEM), respectively. Three structures suggested based on trimethyl silanol (I) wet out condensation (II III) with dopped followed by H-bonding interactions (IV). outcomes B3LYP/6-31G(d) frequency calculations favors a three-dimensional SiOC linked (III). Nevertheless, EDX reveals, 3D links are not observed surface membranes, however, is found dominant in bulk, [(CH3)3SiOCH2CH2CH2O]n. solubility, density, refractive index synthesized measured depended ratio membranes. current results that published earlier including dimethoxydimethylsilane at same conditions.