Filmability and properties of compatibilized PA6/LDPE blends

Abstract

Blends of low density polyethylene (LDPE) and polyamide 6 (PA6), compatibilized with an ethylene-acrylic acid copolymer (EAA), either alone or combined with a low molar mass bis-oxazoline compound (PBO), have been processed in film blowing operations and the properties of the films have been investigated. Without of compatibilization, the filmability of the blend was very poor and no significant specimen was collected. As a result of the reactive compatibilization, the blends with EAA and even more with the EAA-PBO, were processed successfully in film blowing. The films of the quaternary blends were shown to possess satisfactory mechanical properties as a result of fine and stable morphology. The results confirm the conclusion of a previous study, i.e., that the PBO fourth component may promote the in situ formation of PA6-g-EAA copolymers by reaction with both the functional groups of PA6 and the carboxyl groups of EAA.

Compatibilized polyamide 6/polyethylene blend–clay nanocomposites: Effect of the degradation and stabilization of the clay modifier

“…The aim of this work was to study the preparation and the characterization of blends of a sample of high-density polyethylene with polyamide 6 in the presence of an organo-modified montmorillonite and a compatibilizing system already used for other similar systems [22][23][24]. In particular, the aim of the work was to try to find a correlation between the mechanical performance, the morphology and the interactions between the clay and the polymer matrix.…”

“…During the last years, it has been shown that such blends can be efficiently compatibilized with numerous compounds derived from maleic anhydride, acrylic acid, glycidyl methacrylate, oxazoline, etc., grafted onto the polyolefin chain so that hydrogen bonds, or even covalent bonds, can be formed between the two polymers at the blending stage [15][16][17][18][19][20][21][22][23][24].…”

On the Preparation and Characterization of Polyethylene/Polyamide Blends by Melt Processing in the Presence of an Ethylene/Acrylic Acid Copolymer and of New Phosphazene Compounds

“…This is probably due to some compatibilization effect as already stated in several other works. [10,11,13,42] These effects are even more evident when the CP compounds are added. In this case the viscosity is the highest, in particular at low frequencies when the tendency to an yield stress can be observed, especially in the HDPE-based blends (see Figure 3).…”

“…Furthermore, as already said, EAA may act as a compatibilizer for this kind of blends as already found elsewhere for the same polymer couple, [10,11,13,42] while CPs may promote either the formation of compatibilizers and/or also chain extension of the polyamide that can contribute to increase the viscosity. [37][38][39][40] As for the more pronounced non-Newtonian behavior, in compatibilized systems the in situ formed copolymers are located at the interface between the two polymers provoking an increased adhesion between the phases.…”

Comparison of Na+-MMT and Ca2+-MMT for the preparation and characterization of poly(ethylene-co-acrylic acid) ionomer/MMT nanocomposites

“…The presence of free carboxyl groups on the polymer backbone makes it an excellent candidate for several modification reactions. Examples of the use of modified PEAA can be found in the fields of compatibilization, [15][16][17] biomedical applications 18,19 and packaging. 20 Sodium montmorillonite (Na + -MMT) is the most common clay used to prepare PCNs.…”