Polymerization of Micro-Block Associative Polymer with Alcohol-Surfmer Mixed Micellar Method and Their Rheological Properties

Abstract

In this paper, mixed micelle composed of alcohol and polymerizable surfactant (surfmer) were constructed. The aggregated numbers of surfmer (hexadecyl trimethyl allylammonium chloride (C16DMAAC)) in the mixed micelle were measured using a steady-state fluorescence quenching (SSFQ) technique. Using a mixed micellar method with adiabatic polymerization and post-hydrolyzation techniques, the high molecular weight (Mw) micro-block associative polymer of P(AM-NaAA-C16DMAAC) was polymerized. Structures were characterized by Fourier transform-infrared (FT-IR) spectroscopy and 13 C nuclear magnetic resonance (NMR) spectroscopy. Using rheological experiments, the effects of micro-block length and salt concentration of on the thickening and viscoelastic rheological properties of the polymers were studied. All experiments confirmed that the micro-block length could be adjusted using the mixed micellar method. Increases in the micro-block length were accompanied by decreases in the critical associative concentration (CAC). The viscosities and viscoelastic rheological properties increased to maximum then decreased steady with the length increasing, indicating that the length was at an optimum value.

Mechanism of Polyacrylamide Hydrogel Instability on High-Temperature Conditions

“…28 This can be expressed via the following eq 1. 29 Therefore, to investigate the effect of aging time on molecular weight, the viscosity of the polymer as a function of aging time was measured at different temperatures (Figure 1). The results showed that the viscosity of the linear PAM solution decreases over time, and the elevated temperature sharply decreases viscosity.…”