English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  Structure and dynamics of nondilute polyfluorene solutions

Fytas, G., Nothofer, H. G., Scherf, U., Vlassopoulos, D., & Meier, G. (2002). Structure and dynamics of nondilute polyfluorene solutions. Macromolecules, 35(2), 481-488.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-66AB-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-6936-C
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Fytas, G.1, Author              
Nothofer, H. G.1, Author              
Scherf, Ullrich1, Author              
Vlassopoulos, D., Author
Meier, G.1, Author              
Affiliations:
1MPI for Polymer Research, Max Planck Society, ou_1309545              

Content

show
hide
Free keywords: -
 Abstract: The rotational and translational diffusion dynamics of newly synthesized polyfluorenes were studied by dynamic light scattering over a broad concentration range up to the lyotropic state. On the basis of small-angle neutron scattering and translational diffusion measurements in dilute solutions. the single polymers were described as wormlike chains with a low persistent length l = 7 +/- 0.5 nm and cross-section diameter d = 1.8 +/- 0.5 nm. In the semidilute concentration regime, the rate of increase of the cooperative diffusion and the osmotic pressure with c/c* (c* being the overlap concentration) was lower than for linear flexible chains in good solvent. The intermediate scattering function displayed a second process assigned to chain relaxation, in reasonable agreement with the longest relaxation time obtained from shear rheometry. The bimodal shape of the orientation correlation function, which is a characteristic feature of shape persistent polymers and exhibits a peculiar dependence on the scattering angle, was also observed in this model system. The fuzzy cylinder model adequately represented the concentration dependence of the osmotic modulus and the chain orientation time, conforming to the wormlike nature of these polymers.

Details

show
hide
Language(s): eng - English
 Dates: 2002-01-15
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: No review
 Identifiers: eDoc: 28565
ISI: 000173229600025
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Macromolecules
  Alternative Title : Macromolecules
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 35 (2) Sequence Number: - Start / End Page: 481 - 488 Identifier: ISSN: 0024-9297