Aggregation of hydrophobic substituents of poly(acrylate)s and their competitive complexation by β- And γ-cyclodextrins and their linked dimers in aqueous solution

Jie Wang, Li Li, Xuhong Guo, Li Zheng, Duc Truc Pham, Stephen F. Lincoln, Huy Tien Ngo, Philip Clements, Bruce L. May, Robert K. Prud'Homme, Christopher J. Easton

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

Competition between the aggregation of the octadecyl substituents of 3% randomly substituted poly(acrylate), PAAC18, and of the dodecyl substituents of the PAAC12 analogue, and their complexation by β-cyclodextrin, βCD, the linked dimers, N,N′-bis(6A-deoxy-6A-β- cyclodextrin)urea, 66βCD2ur, and N,N′-bis(6 A-deoxy-6A-β-cyclodextrin)succinamide, 66βCD2su, and γ-cyclodextrin, γCD, and the analogous dimers 66γCD2ur and 66γCD2su have been studied in aqueous solution. The zero-shear viscosities of 3.3 wt % aqueous solutions of PAAC18, decreases in the presence of βCD, 66βCD 2ur, 66βCD2su and γCD, is little changed in the presence of 66γCD2ur, and increases in the presence of 66γCD2su. In contrast, the zero-shear viscosities of aqueous solutions of PAAC12 increase in the presence of βCD, γCD, and their dimers but they are much less than those of the corresponding PAAC18 solutions. These macroscopic variations are due to host-guest complexation of the octadecyl and dodecyl substituents by βCD, γCD, and their dimers (as shown by 2D 1H NOESY NMR spectroscopy) competing with aggregation of the octadecyl and dodecyl substituents where differences in substituent length and cyclodextrin annular size are dominant factors.

Original languageEnglish (US)
Pages (from-to)7566-7571
Number of pages6
JournalIndustrial and Engineering Chemistry Research
Volume50
Issue number12
DOIs
StatePublished - Jun 15 2011

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Fingerprint Dive into the research topics of 'Aggregation of hydrophobic substituents of poly(acrylate)s and their competitive complexation by β- And γ-cyclodextrins and their linked dimers in aqueous solution'. Together they form a unique fingerprint.

  • Cite this