Abstract
To functionalize poly(vinyl chloride) (PVC) for various applications, monomers containing tertiary amine group are incorporated into PVC via atom transfer radical polymerization (ATRP) initiated by the labile chlorines in their backbones. The kinetics of synthesis was carefully investigated, and it is proven that the grafting polymerization process can be effectively controlled by regulating the reaction time. The membranes are fabricated using PVC and copolymers by non-solvent induced phase separation (NIPS) process. The hydrophilicity and pore structure of copolymer membranes were enhanced as well, these membranes are endowed with positive charge. When PDMA% (i.e., the PDMA weight percentage in copolymer) is 31.1%, the flux and Victoria blue B rejection are 26.0 L·m-2·h-1 (0.5 MPa) and 91.2%, respectively. Thus, the newly synthesized polymer is proven to be a promising material for dye separation with positive charges.
Highlights
Poly(vinyl chloride) (PVC) is one of the most important commercial plastics in the world
The membrane is made up of a novel PVC based copolymer, which is synthesized by grafting poly(N,N-dimethylaminoethyl methacrylate) (PDMA) chains onto PVC by atom transfer radical polymerization (ATRP) process, which has been adopted as the common technique for polymer synthesis and membrane modification[21 26]
These results suggest that the grafting copolymerization process is controllable within a predefined time period, which accords to the live character of ATRP process at low conversions
Summary
Poly(vinyl chloride) (PVC) is one of the most important commercial plastics in the world. The membrane is made up of a novel PVC based copolymer, which is synthesized by grafting poly(N,N-dimethylaminoethyl methacrylate) (PDMA) chains onto PVC by ATRP process, which has been adopted as the common technique for polymer synthesis and membrane modification[21 26]. Synthesis of Graft Copolymer PVC-g-PDMA PVC-g-PDMA has been synthesized via a single-step ATRP process utilizing the labile chlorines (i.e. allylic and tertiary chlorines) (Fig. 1).
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