Rheological Properties of Compositions Based on Modified Polyvinyl Alcohol

Lviv Polytechnic National University, Department of Chemical Technology and Plastics Processing, Bandera 12 St., 79013 Lviv, Ukraine
Lublin University of Technology, Faculty of Mechanical Engineering, Department of Polymer Processing, Nadbystrzycka 36 St., 20-618 Lublin, Poland
Adv. Sci. Technol. Res. J. 2017; 11(3):304–309
Publish date: 2017-09-03
The paper is dedicated to development of a method for producing structured waterproof films based on polyvinyl alcohol (PVA) and montmorillonite-polyvinylpyrrolidone mixture (MPM) to research the impact of borax, pH-environment and MPM content on the rheological properties PVA solutions and water absorption capacity of films based on them. By experimental studies have been established that the montmorillonite- polyvinylpyrrolidone mixture significantly affects on viscosity the characteristics of the solution polyvinyl alcohol provided their mixing in the ultrasonic field. Composition of traces of sodium tetraborate in the aqueous solution eminent by the highest rates of viscosity. Also, designed compositions considerable influence pH at the viscosity, particularly compositions obtained in weakly alkaline environment with higher values of relative viscosity than compositions obtained in neutral and acidic environments. Simultaneously, is the best water resistance and mechanical properties of films obtained in an acidic environment. The optimum from the standpoint of durability and water resistance is a composition of PVA:MPM = 12:1 and because, depending on the contents of the MPM and pH characteristics films based on PVA can be adjusted over a wide range, which would expand the scope.
Tomasz Jachowicz   
Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland