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
Date PublishedFEB
Type of ArticleArticle
Keywords3-pentadecylcyclohexylamine (3-PDCA), hydrophobically modified polymers (HMPs), poly(acrylic acid), reversible associations, Rheology

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.

Type of Journal (Indian or Foreign)Foreign
Impact Factor (IF)2.495
Divison category: 
Polymer Science & Engineering