Using Vinyl Acetate, N‐Hydroxymethyl Acrylamide, and Montmorillonite Intercalated by a Dioctadecyl Dimethyl Ammonium Bromide Surfactant to Prepare Exfoliated Nanocomposite through In Situ Polymerization

Abstract

In this study, vinyl acetate, N-hydroxymethyl acrylamide (NMA), and organic montmorillonite intercalated by a dioctadecyl dimethyl ammonium bromide surfactant (MMT-DOAB) were used to prepare exfoliated nanocomposites through in situ polymerization. Wide-angle X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, power-law function equation, Newtonian fluid flow equation, Cross-Williamson model viscous equation, Hooke's law, and Poisson's ratio equation revealed the structures, dispersion, rheology, and static tensile properties. The exfoliated nanocomposites were pseudoplastic non-Newtonian fluids with good dispersion in water, great storage stability, and high static tensile strength at 6.89-8.15 MPa. The contents of NMA and MMT-DOAB increased with the changes in synthesis precursors, as the calculated molecular weights did. C 2015 Wiley Periodicals, Inc. Adv Polym Technol 2017, 36, 21601; View this article online at wileyonlinelibrary.com.

Preparation and characterization of phosphorylated graphene oxide grafted with poly(L‐lactide) and its effect on the crystallization, rheological behavior, and performance of poly (lactic acid)

“…Figure shows the capillary rheological curves of PLA0 and PLA2 at 185°C. It was obvious from Figure A that the apparent viscosity of PLA0 and PLA2 showed similar decreasing trends with an increase of shear rate at constant temperature, which is consistent with the fact that the viscosity of the pseudoplastic fluid decreases as the shear rate increases . As shown in Figure B, during the feeding process of the composite material, the resistance in the mixing chamber suddenly increases, causing the torque rapidly increase in a short time.…”

“…It was obvious from Figure 14A that the apparent viscosity of PLA0 and PLA2 showed similar decreasing trends with an increase of shear rate at constant temperature, which is consistent with the fact that the viscosity of the pseudoplastic fluid decreases as the shear rate increases. 51 As shown in Figure 14B, during the feeding process of the composite material, the resistance in the mixing chamber suddenly increases, causing the torque rapidly increase in a short time. Then, with the screw speed rising to 30 rpm, the PLA nanocomposites material was melted, compacted, and evenly dispersed under the action of screw shear and heating.…”

Effect of Secondary Particles on Self-Healing and Electromechanical Properties of Polymer Composites Based on Carbon Black and a Diels–Alder Network

“…Polymer nanocomposites based on layered silicate have received much attention in the past because of several advantages, including reinforcement in the mechanical properties (high strength and modulus) or thermal properties . They also exhibit other properties such as decreased gas permeability and flammability, increased biodegradability, barrier properties, − and corrosion inhibition. − Extensive studies on nanoclay/rubber nanocomposites have been done to show the strong reinforcing effect of even a low nanoclay content in many rubber matrixes. , …”