Effect of 1,2-Glycol Structure and Stereoregularity of Poly(vinyl alcohol) on Poly(vinyl alcohol)–Iodine Reactions

Surface Adsorption of Polyethylene Glycol and Polyvinyl Alcohol with Variable Molecular Weights on Zinc Oxide Nanoparticles

The Effect of Adding Alginate Natural Polymer on the Structure of Polyvinyl Alcohol Biocompatible Nanofibers in Electrospinning Process

Background: Nowadays, in order to preserve the environment and sustainable development, the use of natural and renewable resources is a priority for industries. High performance and specific structure of nano-biocompatible materials has attracted researchers. In this research, alginate polymer, which is generally obtained from marine sources such as algae, was added to polyvinyl alcohol nanofi...

the effect of explicit teaching of metacognitive vocabulary learning strategies on recall and retention of idioms

چکیده ندارد.

EFFECT OF POLYVINYL ALCOHOL ON FLEXURAL STRENGTH AND SOME IMPORTANT PHYSICALPROPERTIES OFPORTLAND CEMENT PASTE

Abstract: This work was designed to investigate the simultaneous effect of both water-to-cement (W/C) and polymer-to-cement(P/C) ratios on flexural strength of type V Portland cement pastes containing polyvinyl alcohol. The obtained resultsconfirmed the strong effect of W/C-ratio on the effectiveness of the added polymer so that there exist optimum valuesfor both W/C and P/C-ratios. Pastes prep...

EFFECT OF OPERATING CONDITIONS ON THE DEHYDRATION OF TOLUENE BY PERVAPORATION USING A POLYVINYL ALCOHOL MEMBRANE

The effects of operating parameters such as feed temperature and permeate-side pressure on the performance of a commercial PVA membrane in the dehydration of toluene by a pervaporation (PV) membrane system is studied in the present work. The results obtained indicate that increasing temperature in the range of 40 to 70 °C and reducing permeate pressure in the range of 1 to 10 mmHg increase memb...