%K Acetic acid; Glacial geology; Glass transition; Mechanical properties; pH; Polyvinyl alcohols; Scanning electron microscopy; Solubility; Thermoanalysis, Blend ratios; FTIR spectroscopy; Glacial acetic acid; Hydrogen bonding interactions; Nitrogen atom; Physicomechanical properties; Poly (vinyl alcohol) (PVA); Single glass transition, Hydrogen bonds
%I Institute of Physics Publishing
%O cited By 5; Conference of 5th International Conference on Fundamental and Applied Sciences, ICFAS 2018 ; Conference Date: 13 August 2018 Through 15 August 2018; Conference Code:142772
%L scholars9603
%D 2018
%V 1123
%X The present study investigates the effect of blend ratios on the miscibility and physico-mechanical properties of polyvinyl alcohol (PVA)/urea (U) blends. PVA/U blends were synthesized in aqueous solution with different blend ratios 65/35, 50/50 and 35/65 respectively, using glacial acetic acid as crosslinking. The properties of PVA/U blends examined included FT-IR, 1 H NMR, 13 C NMR, TGA, DSC and scanning electron microscopy (SEM). The obtained results showed that the miscibility and physico-mechanical properties of PVA/U blends are strongly dependent on PVA ratio in the blends. FT-IR spectroscopy was used to check the hydrogen bonding interaction between PVA and U in the blends. The formation of hydrogen bond was through the lone pair attraction from nitrogen atoms of U towards protonated hydroxyl of PVA. These blends have a single glass transition indicating that these blends are able to form a miscible phase due to the formation of hydrogen bonds. The addition of glacial acetic acid as cross-linking improved the thermal analysis of the blend. The scanning electron microscopy of PVA/U showed crystals of varying sizes with flake shapes compared to the pure PVA. © Published under licence by IOP Publishing Ltd.
%N 1
%R 10.1088/1742-6596/1123/1/012066
%T The effect of blend ratios on physico-mechanical properties and miscibility of cross-linked poly(vinyl alcohol)/urea blends
%J Journal of Physics: Conference Series
%A E.-S. Negim
%A L. Bekbayeva
%A H. Adam
%A G. Yeligbayeva
%A E. Ganjian
%A M. Saleh
%A B. Saad