title: Poly(2-vinylpyridine)-block -Poly(ϵ-caprolactone) single crystals in micellar solution.
abstract: Self-assembly of poly(2-vinylpyridine)-block-poly(ϵ-caprolactone) (P2VP-b-PCL) diblock copolymer in the presence of a selective solvent is investigated by transmission electron microscopy and atomic force microscopy. Addition of water into a P2VP-b-PCL solution in N,N-dimethylformamide at 20 °C produces elongated truncated lozenge shaped single crystals of uniform size and shape in large quantities. The single crystals are composed of PCL single-crystal layer sandwiched between two P2VP layers tethered on the top and bottom basal surfaces. The formation of the single crystals is found to depend on the temperature. These findings provide a facile approach to the preparation of uniform single crystals in large quantities.
authors: State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Graduate School of the Chinese Academy of Sciences, Changchun 130022, P. R. China.
authors: Mei
authors: M
authors: Su
authors: Haiying
authors: H
authors: Huang
authors: Xiaojing
authors: X
authors: Ma
authors: Qian
authors: Q
authors: Wang
authors: Zhaohui
authors: Z
authors: Su
mesh_terms: D003460:Crystallization; D004126:Dimethylformamide / Q000737:chemistry*; D008823:Micelles; D018625:Microscopy, Atomic Force; D046529:Microscopy, Electron, Transmission; D010316:Particle Size; D011091:Polyesters / Q000737:chemistry*; D011145:Polyvinyls / Q000737:chemistry*; D011725:Pyridines / Q000737:chemistry*; D012996:Solutions; D013499:Surface Properties; D013696:Temperature; D014867:Water / Q000737:chemistry*
chemical_list: D008823:Micelles; D011091:Polyesters; D011145:Polyvinyls; D011725:Pyridines; D012996:Solutions; D014867:Water; C016240:polycaprolactone; C058671:poly(2-vinylpyridine); D004126:Dimethylformamide
keywords: block copolymer; micelle; single crystal; temperature