Aggregation behavior of a polystyrene–b-poly(phenylsilsesquioxane) H-type copolymer at the air/water interface

A comprehensive Langmuir film balance/atomic force microscope study of the surface aggregation behavior of an H-type block copolymer having four branches of polystyrene (PS) blocks (number average molar mass (Mn) = 5000 Da per each branch) and poly(phenylsilsesquioxane) (PPSQ) (Mn = 40,000 Da) has b...

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Bibliographic Details
Published in:Polymer (Guilford) 2012-05, Vol.53 (11), p.2223-2232
Main Authors: Seo, Yongsok, Youm, Sang Gil, Kim, Ji Hun, Seo, Youngwook P., Hong, Soon Man, Sohn, Dae Won, Takahara, Atsushi, Choi, Hyoung Jin
Format: Article
Language:English
Subjects:
aggregation behavior
air
Applied sciences
Exact sciences and technology
H-block copolymer
hysteresis
Inorganic and organomineral polymers
micelles
molecular weight
Physicochemistry of polymers
Pi–A behavior
polystyrenes
Properties and characterization
Surface micelle aggregation
temperature
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Summary:A comprehensive Langmuir film balance/atomic force microscope study of the surface aggregation behavior of an H-type block copolymer having four branches of polystyrene (PS) blocks (number average molar mass (Mn) = 5000 Da per each branch) and poly(phenylsilsesquioxane) (PPSQ) (Mn = 40,000 Da) has been performed. Temperature dependent surface pressure isotherms and hysteresis experiments were combined with molecules aggregation number per surface micelle, leading to a self-consistent picture of the surface morphology and aggregation phenomena. In spite of the ladder structure of the PPSQ segment, the micelles mostly exist as spherical aggregates because of strong interaction between PS blocks. [Display omitted]
ISSN:0032-3861
1873-2291
DOI:10.1016/j.polymer.2012.03.032