Emulsion Polymerization of Vinyl Acetate in the Presence of a New Cationic Surfactant

Ayfer Saraç ,Bahire Filiz Şenkal ,Murat Onur Yildirim

doi:10.4236/ajac.2014.51003

Abstract

In this study, the emulsion homopolymerization system containing vinyl acetate, potassium persulfate, a new cationic polymeric surfactant and water was studied by the applying semi-continuous emulsion polymerization process. The effects of new polymeric emulsifier on the physicochemical properties of obtained vinyl acetate latexes were investigated depending on vinyl acetate percentage in the polymerization recipe, and two thermal initiators in homopolymerization.

Highlights

The stability of polymeric dispersions is a property of practical importance and the search for an optimized strategy to equip polymer dispersions with sufficient stability is a matter of continuous research during the past years
Chemical structure of synthesized new cationic surfactant was given in Scheme 1
The polymeric product was characterized by FT-IR, viscosity measurements and critical micelle concentration

Summary

Introduction

The stability of polymeric dispersions is a property of practical importance and the search for an optimized strategy to equip polymer dispersions with sufficient stability is a matter of continuous research during the past years. The kernel is to reach a sufficient stability, as it is required during polymerization, conditioning, or storage and to allow coagulation or coalescence of particles when it is needed, such as during separation of polymer from latex or during film formation. Stability is an important topic in the field of polymer colloid research such as under the conditions of the polymerization process [1]. Small amounts of surfactant are enough to self-assemble into micellar microaggregates [2]. Particle stabilization is achieved by the use of various surfactants which are employed in emulsion polymerization formulations. The anionic and nonionic surfactants are the most widely utilized because of en-

Objectives

Results

Conclusion