Composite Worm-Like Aggregates Formed from a Pair of Block-Copolymers Containing Hydrogen-Bonding Donor and Acceptor
✍ Scribed by De'an Xiong; Linqi Shi; Xiaowei Jiang; Yingli An; Xi Chen; Juan Lü
- Publisher
- John Wiley and Sons
- Year
- 2007
- Tongue
- English
- Weight
- 511 KB
- Volume
- 28
- Category
- Article
- ISSN
- 1022-1336
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✦ Synopsis
Abstract
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.
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