Premium
Macromolecular aggregation: Complexation due to hydrogen bonding and hydrophobic association
Author(s) -
Jiang Ming,
Li Mei,
Liu Lu,
Xiang Maoliang,
Zhu Lei
Publication year - 1997
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.19971240115
Subject(s) - hydrogen bond , ionomer , polymer , pyrene , fluorocarbon , intermolecular force , hydrophobic effect , hydrophobe , aqueous solution , polymer chemistry , chemical engineering , macromolecule , ionic bonding , london dispersion force , materials science , dispersion (optics) , chemistry , copolymer , molecule , organic chemistry , van der waals force , ion , physics , optics , engineering , biochemistry
This paper reports the main results of the studies carried out in our laboratory on various kinds of polymer aggregation in aqueous and organic solutions. (1) In solutions of a polymer blend with controllable hydrogen bonding, a transition from individual polymer coils to intermolecular complex is observed as the hydrogen bonding interaction increases to a certain level. This is found to be a general phenomenon of polymer blends in which hydrogen bonding is adjustable. (2) A new kind of aggregation behavior of block ionomers based on SEBS is found and studied by fluorospectroscopy. The results explore that the block ionomer can form dispersion of hydrophobic aggregates in water stabilized by rare ionic groups. (3) Fluorocarbon‐containing PNIPAM in water establishes hydrophobic association. Fluorocarbon‐modified pyrene (PycoRf) is found to be qualified to serve as a fluorescent probe to monitor the association.