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Hydrophobically modified poly(acrylic acid) using 3-pentadecylcyclohexylamine: synthesis and rheology

TitleHydrophobically modified poly(acrylic acid) using 3-pentadecylcyclohexylamine: synthesis and rheology
Publication TypeJournal Article
Year of Publication2005
AuthorsShedge, AS, Lele, AK, Wadgaonkar, PP, Hourdet, D, Pcrrin, P, Chassenieux, C, Badiger, MV
JournalMacromolecular Chemistry and Physics
Volume206
Issue4
Pagination464-472
Date PublishedFEB
Type of ArticleArticle
ISSN1022-1352
Keywords3-pentadecylcyclohexylamine (3-PDCA), hydrophobically modified polymers (HMPs), poly(acrylic acid), reversible associations, Rheology
Abstract

Hydrophobically modified poly(acrylic acid) was synthesized using 3-pentadecylcyclohexylamine (3-PDCA), which was in turn synthesized from 3-pentadecylphenol, one of the components of cashew-nut shell liquid (CNSL), a renewable resource material. H-1 NMR spectra confirmed the incorporation of 3-PDCA onto PAA and a series of HMPs with three different molar concentrations, viz. congruent to 3, 5 and 7 mol-% of 3-PDCA, were synthesized. An increase in viscosity with increasing hydrophobic content was observed by rheological measurements. The critical association concentrations were determined using an Ubbelohde viscometer and a controlled stress rheometer. The stability of HMPs towards temperature and shear was studied. Rheological measurements showed that there was a steady increase in viscosity with increase in hydrophobe content due to the formation of reversible networks. These polymers exhibited gel-like behavior at low concentrations (greater than or equal to2 wt.-%) with an apparent yield stress (ca. 10 Pa) and showed shear thinning properties (non-Newtonian). However, below a critical concentration, c [eta], they showed Newtonian behavior.

DOI10.1002/macp.200400392
Type of Journal (Indian or Foreign)

Foreign

Impact Factor (IF)

2.495

Divison category: 
Polymer Science & Engineering