BROWSE

Related Researcher

Author

Park, Soojin
Nano-Functional Materials Lab
Research Interests
  • Block Copolymers, nanostructured materials for Lithium-Ion batteries, wearable and stretchable energy storage applications

ITEM VIEW & DOWNLOAD

Property of diblock copolymer having extremely narrow molecular weight distribution

Cited 18 times inthomson ciCited 20 times inthomson ci
Title
Property of diblock copolymer having extremely narrow molecular weight distribution
Author
Park, SoojinRyu, Du YeolKim, Jin KonRee, MoonhorChang, Taihyun
Keywords
HPLC fractionation; Microphase; Polystyrene-block-polyisoprene
Issue Date
200804
Publisher
ELSEVIER SCI LTD
Citation
POLYMER, v.49, no.8, pp.2170 - 2175
Abstract
Molecular weight distribution effect on the morphological behavior of polystyrene-block-polyisoprene (PS-b-PI) diblock copolymers was investigated. PS-b-PI samples were prepared by anionic polymerization and further fractionated by HPLC to obtain the fractions of similar average molecular weight and composition but of narrower distributions in both molecular weight and composition. The strategy is to use reversed-phase LC to fractionate the PI block and normal phase LC to fractionate the PS block with a minimal effect on the other blocks. The interfacial thickness, grain size and the phase transition behavior of the unfractionated and fractionated PS-b-PI were compared by X-ray reflectivity, small angle X-ray scattering, transmission electron microscopy and rheological measurements. The fractionated PS-b-PI with more homogeneous molecular weight and composition exhibits a narrower interface, larger grain size and a sharper morphological transition compared to the unfractionated PS-b-PI.
URI
Go to Link
DOI
http://dx.doi.org/10.1016/j.polymer.2008.03.009
ISSN
0032-3861
Appears in Collections:
ECHE_Journal Papers

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qr_code

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU