Selective localization of organic montmorillonite nanoparticles in multilayered high‐density polyethylene/polyamide 6 composites

Abstract

To achieve a selective localization of nanoparticles in multilayered two-component polymer blends, an intentional two-step process, first pre-compounding and then coextruding, was employed to prepare multilayered high-density polyethylene (HDPE)/ polyethylene-grafted maleic anhydride (PEg-MAH)/organic montmorillonite (OMMT)-polyamide 6 (PA6) nanocomposites. The dispersion of OMMT was evaluated by transmission electron microscopy (TEM) and X-ray diffraction (XRD). The results showed that the localization of OMMT was tunable with different content of PE-g-MAH. By comparing the localization of OMMT in a single-layered nanocomposite with that in the multilayered nanocomposites, as well as by theoretically calculating wetting coefficients of the multilayered nanocomposites, the migration mechanism of OMMT was revealed. As demonstrated by differential scanning calorimetry (DSC), transmission rate measurement and tensile test, the selective localization of OMMT in the multilayered nanocomposites could increase crystallinity degree of the two-polymer components, enhancing oxygen barrier property and tensile strength of the nanocomposties. K E Y W O R D Shigh-density polyethylene, migration of nanoparticles, multilayered composites, polyamide 6, selective localization

Fabrication of reinforced and toughened PC/PMMA composites by tuning the migration and selective location of graphenes during melt blending

“…The migration and selective location of layered nanoparticles in polymer blends during melt blending have been widely studied in recent two decades as they offer opportunities to obtain materials with excellent properties. [1][2][3][4][5][6] In general, layered nanoparticles could selectively distribute in dispersed phase, matrix phase or an interface of polymer blends under proper thermodynamic and kinetic factors; 2 this selective distribution determine the ultimate properties of blends by affecting the microstructure. If the distribution of layered nanoparticles can be tuned in a controlled manner, a polymer blend with tailored performance can be prepared.…”

“…If the distribution of layered nanoparticles can be tuned in a controlled manner, a polymer blend with tailored performance can be prepared. 6,7 In fact, the controlled preparation of locally distributed layered nanoparticle/polymer composites with tailored properties is always one of the ambitions that researchers focus on.…”