Synthesis and morphological behavior of model 6-miktoarm star copolymers, PS(P2MP) 5, of Styrene (S) and 2-Methyl-1,3-Pentadiene (P2MP)

Anastasios Mavroudis, Apostolos Avgeropoulos, Nikolaos Hadjichristidis*, Edwin L. Thomas, David J. Lohse

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


Three 6-miktoarm star (6μ-star) copolymers [PS(P2MP) 5] of styrene (S) and 2-methyl-1,3-pentadiene (2MP) were synthesized by anionic polymerization and controlled chlorosilane chemistry, using high vacuum techniques. In all cases [M w = 103 kg/mol, [S] = 44% (v/v); M w = 91.1 kg/mol, [S] = 53% (v/v); M w = 224 kg/mol, [S] = 92% (v/v)] the P2MP exhibited high 1,4-microstructure (∼99%). Molecular characterization (size-exclusion chromatography, membrane osmometry, low-angle laser light scattering, and NMR) revealed high molecular weight/composition homogeneity, and structural analysis (differential scanning calorimetry, transmission electron microscopy, and small-angle X-ray scattering) showed highly ordered patterns. The deviations from predictions based on Milner's morphological model are much more pronounced than that of PS(P2MP) 2 and PS(P2MP) 3 miktoarm stars, which we attribute to greater crowding of the arms for these highly branched molecules.

Original languageEnglish (US)
Pages (from-to)2164-2168
Number of pages5
JournalChemistry of Materials
Issue number8
StatePublished - Apr 18 2006

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry


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