標題: | Self-Assembly Structures through Competitive Interactions of Crystalline-Amorphous Diblock Copolymer/Homopolymer Blends: Poly(epsilon-caprolactone-b-4-vinyl pyridine)/Poly(vinyl phenol) |
作者: | Chen, Wan-Chun Kuo, Shiao-Wei Lu, Chu-Hua Jeng, U-Ser Chang, Feng-Chih 應用化學系 Department of Applied Chemistry |
公開日期: | 26-五月-2009 |
摘要: | A series of immiscible crystalline-amorphous diblock copolymers, poly(epsilon-caprolactone)-b-(4-vinyl pyridine) (PCL-b-P4VP), were synthesized through combination of sequential ring-opening and controlled living free radical (nitroxide-mediated) polymerizations and then blended with poly(vinyl phenol) (PVPh) homopolymer. Miscibility and self-assembly morphologies mediated by hydrogen-bonding interactions of this new A-B/C type polymer blend are discussed in detail. Self-assembly morphologies of these immiscible PCL-b-P4VP diblock copolymers change through competitive hydrogen-bonding interactions with the increase of PVPh contents The SAXS profiles also reveal a sharp primary peak and highly long-range order reflections such as cylinder or sphere structure at relatively lower PVPh content, which is consistent with TEM images. DSC, WAXD, and FT-IR analyses provide positive evidence that the pyridine group of P4VP is a significantly stronger hydrogen-bond acceptor than the carbonyl group of PCL with the hydroxyl group of PVPh and results in the excluded and confined PCL phase. |
URI: | http://dx.doi.org/10.1021/ma900080v http://hdl.handle.net/11536/7217 |
ISSN: | 0024-9297 |
DOI: | 10.1021/ma900080v |
期刊: | MACROMOLECULES |
Volume: | 42 |
Issue: | 10 |
起始頁: | 3580 |
結束頁: | 3590 |
顯示於類別: | 期刊論文 |