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Surfactant induced mesomorphic behaviour of flexible polymers
Author(s) -
Ikkala Olli,
Ruokolainen Janne,
Torkkeli Mika,
Serimaa Ritva,
Brinke Gerrit Ten
Publication year - 1996
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19961120127
Subject(s) - polymer , materials science , phase (matter) , chemical physics , small angle x ray scattering , hydrogen bond , copolymer , pulmonary surfactant , polymer chemistry , polyamide , pyridine , polar , chemical engineering , chemistry , organic chemistry , molecule , scattering , composite material , physics , optics , astronomy , engineering
Conditions for micro phase separated structures based on flexible polymers associated with surfactants have been investigated. Reasonably strong attractive interactions are required to oppose macro phase separation between polymer and surfactant. In order to obtain micro phase separation, additionally a sufficiently strong polar‐nonpolar repulsion has to be present. Poly(4‐vinyl pyridine), poly(2‐vinyl pyridine) and polyamide 6 have been used as model polymers in this work. Associations based on protonation, metal coordination and hydrogen bonding are presented and shown to yield micro phase separation under suitable conditions. In the charged systems, the polar‐nonpolar repulsion easily becomes large enough to render micro phase separated structures. In hydrogen bonded (i.e. noncharged) systems a more delicate balance can be achieved in which case an order‐disorder transition takes place from a homogeneous state, exhibiting nonetheless a distinct SAXS peak due to characteristic block copolymer‐like fluctuations, to a micro phase separated ordered state.