Investigation on the morphological and mechanical properties of (polyamide 6)/(poly[styrene‐co‐acrylonitrile])/(poly[styrene‐b‐{ethylene‐co‐butylene}‐b‐styrene]) ternary blends

Abstract

In this work, ternary polymer blends based on (polyamide 6)/(poly[styrene-co-acrylonitrile])/(poly[styrene-b-{ethylene-co-butylene}-b-styrene]) (SEBS) triblock copolymer and a varying concentration of the reactive (maleic anhydride)-grafted SEBS were prepared by using a meltblending process. The effects of the material parameters (composition of ternary blends and SEBS/[{maleic anhy-dride}-grafted SEBS] concentration ratio) and blending sequence on the morphological and mechanical properties of ternary blends were studied. Taguchi experimental design methodology was employed to design the experiments and select the material and processing parameters for the optimized mechanical properties. Tensile properties (Young's modulus and yield stress) and impact strength were considered as the response variables. It was demonstrated that there is a meaningful relationship between the composition of blends, processing parameters, observed phase structure, and obtained mechanical properties. The mechanical tests showed that the highest impact strength was achieved as the dispersion of the rubbery phase achieved an optimum size of about 1 lm.

Does nanoclay addition always lead to amelioration? Dual effects of the nanoclay on the PA‐6/EVOH/SEBS ternary blends

“…Incorporating the EVOH phase improved the impact strength of the blends. It may be ascribed to formation of core‐shell particles with optimum size and also acceptable adhesion between the PA‐6 matrix and EVOH shell layer, which can efficiently encourage the mechanisms of toughening of core‐shell droplets …”

“…It may be ascribed to formation of core-shell particles with optimum size and also acceptable adhesion between the PA-6 matrix and EVOH shell layer, which can efficiently encourage the mechanisms of toughening of core-shell droplets. [12][13][14][15]42 Addition of the nanoclays caused a decrease in the impact strength of the blends. The PES-15A-M2 sample had the lowest impact strength.…”

“…The final properties of the ternary blends can be influenced by some important factors such as composition, viscosity ratio, compatibilizer type, and mixing conditions . Various researches have been trying to realize the correlation of affecting parameters with the morphology and final properties of this class of polymer blends . For example, Li et al employed different processing methods for preparation of the polyamide‐6 (PA‐6)/maleic anhydride–grafted ethylene propylene diene monomer (EPDM‐g‐MA)/high density poly ethylene (HDPE) ternary blends.…”

“…[5][6][7] Various researches have been trying to realize the correlation of affecting parameters with the morphology and final properties of this class of polymer blends. [8][9][10][11][12] For example, Li et al 13 employed different processing methods for preparation of the polyamide-6 (PA-6)/maleic anhydride-grafted ethylene propylene diene monomer (EPDM-g-MA)/high density poly ethylene (HDPE) ternary blends. They reported that a thicker EPDM-g-MA shell could be seen in the two-step mixing method in comparison with one-step procedure.…”

Investigating the mechanical, morphological, and thermal behavior of PA‐6/SAN/MWCNT blends: Application of Taguchi experimental design

“…It has been well‐established that there is a close relationship between the phase morphology and final properties of polymer blends. Accordingly, control of the factors affecting the morphology is an essential factor to achieve the desired properties …”