We report on the preparation of nanoporous films based on an amphiphilic graft copolymer of poly(vinyl chloride-graft-methyl methacrylate), i. e., PVC-g-PMMA. The PVC-g-PMMA graft copolymer was synthesized via atom transfer radical polymerization (ATRP), as confirmed by nuclear magnetic resonance spectroscopy ( 1H NMR), Fourier transform-infrared (FT-IR) spectroscopy, and gel permeation chromatography (GPC) analysis. The PVC-g-PMMA graft copolymer molecularly self-assembled into nanophase domains of PVC main chains and PMMA side chains, as revealed by wide angle X-ray scattering (WAXS) and transmission electron microscopy (TEM). The graft copolymer film prepared from tetrahydrofuran (THF), a good solvent for both chains, had a random microphase-separated morphology. However, when prepared from dimethyl sulfoxide (DMSO), a solvent selectively good for PVC, the film exhibited a micellar morphology consisting of a PMMA core and a PVC corona. Nanoporous films with different pore sizes and shapes were prepared through the selective etching of PMMA chains using a combined process of UV irradiation and acetic acid treatment.
Bibliographical noteFunding Information:
This work was supported by the Ministry of Knowledge Economy (MKE) through the Human Resources Development program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) (20104010100500), and Korea Institute for Advancement in Technology (KIAT) through the Workforce Development Program in Strategic Technology. This work was also supported by a National Research Foundation (NRF) grant funded by the Korean government (MEST) through the Korea Center for Artificial Photosynthesis (KCAP) at Sogang University (NRF-2009-C1AAA001-2009-0093879).
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)