Improved rheological properties and stability of multiwalled carbon nanotubes/polymer in harsh environment. Issue 11 (22nd October 2018)

• Record Type: Journal Article
• Authors: Nourafkan, Ehsan; Haruna, Maje Alhaji; Gardy, Jabbar; Wen, Dongsheng
• Is Part Of: Journal of applied polymer science. Volume 136:Issue 11(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-10-22
• Subjects: multiwalled carbon nanotubes -- partially hydrophobic polymer -- polyampholytic polymer -- polyelectrolyte polymer -- rheological behavior -- stability; Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.47205
• Languages: English
• ISSNs: 0021-8995

Abstract

ABSTRACT: This work aims to improve the rheological properties and stability of multiwalled carbon nanotubes (MWCNTs)/acrylamide (AA) base skeleton polymer blends at harsh environment of high salinity‐high temperature (HS‐HT) or various pH. Different co/terpolymers have been accomplished to modify the structure of AA polymer by free‐radical copolymerization of AA‐based monomers. Anionic, cationic, and hydrophobic functional groups were used for the synthesis of polyelectrolyte, polyampholytic, and partially hydrophobic AA polymer types. The conversion, molecular weight, and poly dispersity of co/terpolymers have been evaluated by nuclear magnetic resonance ( 1 H‐NMR), gel permeation chromatography, and differential scanning calorimetry analysis. The effects of sonication power, concentration of polymer, and concentration of MWCNTs were also investigated on rheological behavior of co/terpolymers. The results show that negative polyelectrolyte and polyampholytic polymers are the best candidates for the improvement of MWCNTs/polymer stability and viscosity at HS‐HT and alkali environment, respectively. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci.2019, 136, 47205. Polymer structure modification and improvement of properties: