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Molecular imaging of monodendron jacketed linear polymers by scanning force microscopy
Author(s) -
Prokhorova Svetlana A.,
Sheiko Sergei S.,
Möller Martin,
Ahn CheolHee,
Percec Virgil
Publication year - 1998
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/(sici)1521-3927(19980701)19:7<359::aid-marc359>3.0.co;2-t
Subject(s) - polystyrene , polymer , steric effects , materials science , substituent , polymer chemistry , hydroxymethyl , molecule , tris , crystallography , chemistry , composite material , stereochemistry , organic chemistry , biochemistry
Polystyrene and polymethacrylate with 3,4,5‐tris[4‐(tetradecyloxy)benzyloxy]benzoic acid and 3,4,5‐tris[3,4,5‐tris(dodecyloxy)benzyloxy]benzyl alcohol side groups, respectively, were visualized by scanning force microscopy (SFM). The cylindrical molecules did not interpenetrate and their chain ends could be resolved in the images allowing quantitative evaluation of their length distribution. Whereas the polymethacrylate with the sterically most demanding side groups demonstrated a fairly good agreement between the SFM length and the calculated contour length, the polystyrene with the less branched substituent appeared to be at least two times shorter. The reduced length of the polymer chains was attributed to a disordered helixlike conformation.