Hydrophilic modification of polyvinyl chloride with polyacrylic acid using ATRP
Edina Rusen, Raluca Şomoghi, Cristina Busuioc, Aurel Diacon
Abstract
The aim of this paper was the synthesis of amphiphilic copolymers by employing an atom transfer radical polymerization (ATRP), control polymerization "grafting from" method, initiated both on the surface of an iodinated polyvinyl chloride (PVC-I) membrane and in solution. The iodination of PVC was performed through a Conant-Finkelstein reaction that afforded a 30% molar transformation. Using the contact angle measurements, we highlighted the higher degree of grafting polyacrylic acid (PAA) in the case of solution polymerization, the polar fraction increasing significantly. The micromembrane obtained by surface grafting has pores with a homogenous distribution, which contain -COOH functional groups and with a pore size that decreased about 10 times compared to the initial membrane. The TGA analysis highlighted the thermal resistance changes that the polymers registered.