Molar-mass dependence of the lamellar thickness in symmetric diblock copolymers

C. M. Papadakis, K. Almdal, D. Posselt

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

A homologous series of nine symmetric poly(styrene)-block-poly(butadieme) diblock copolymers was synthesized and characterized. The scaling of the lamellar thickness, D, with the chain length N(DαN δ ) was investigated with small-angle X-ray scattering. Different sample preparation methods were used: annealing, solvent-casting and shear alignment. We find that the lamellar thickness and thus the value of the exponent δ depends on the preparation method used, i.e. care must be taken to ensure that the samples investigated are in thermodynamic equilibrium.

Original languageEnglish
Pages (from-to)835-842
Number of pages8
JournalIl Nuovo Cimento D
Volume16
Issue number7
DOIs
StatePublished - Jul 1994
Externally publishedYes

Keywords

  • Conference proceedings
  • Layer structures, intercalation compounds, and superlattices: growth, structure, and nonelectronic properties
  • Order-disorder and statistical mechanics of model systems
  • Polymers, elastomers, and plastic
  • Small-angle scattering, EDXD, EXAFS, and other techniques

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