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Composite Worm‐Like Aggregates Formed from a Pair of Block‐Copolymers Containing Hydrogen‐Bonding Donor and Acceptor
Author(s) -
Xiong De'an,
Shi Linqi,
Jiang Xiaowei,
An Yingli,
Chen Xi,
Lü Juan
Publication year - 2007
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/marc.200600681
Subject(s) - ethylene glycol , copolymer , dynamic light scattering , acrylic acid , materials science , transmission electron microscopy , polymer chemistry , hydrogen bond , composite number , peg ratio , static light scattering , chemical engineering , polymer , chemistry , composite material , molecule , nanotechnology , nanoparticle , organic chemistry , finance , economics , engineering
Worm‐like aggregates with a PAA/P4VP complex core and a PEG/PNIPAM mixed shell were prepared in ethanol by the comicellization of poly(ethylene glycol)‐ block ‐poly(acrylic acid) (PEG‐ b ‐PAA) and poly( N ‐isopropylacrylamide)‐ block ‐poly(4‐vinylpyridine) (PNIPAM‐ b ‐P4VP) through hydrogen‐bonding. The formed aggregates were studied by dynamic light scattering, static light scattering, 1 H NMR, and transmission electron microscopy. The length of worm‐like aggregates could be adjusted by changing the weight ratio of W (PNIPAM‐ b ‐P4VP)/ W (PEG‐ b ‐PAA). When the ratio changed from 20 to 150%, the length changed from about 100 nm to several microns, and the diameter stayed almost unchanged at about 15 nm.