In Situ Formation of the Core–Shell Particles and Their Function in Toughening PA6/SEBS-g-MA/PP Blends

Abstract

This work aimed at preparing supertough PA6 blends with only a small amount of elastomer. The PA6/SEBS-g-MA/PP blends were obtained by melt extrusion, in which the core−shell particles (PP as core and SEBS-g-MA as shell) could be formed in situ in PA6 matrix. The morphology of PA6 blends was explained by both the thermodynamic factor (interfacial tension and spreading coefficient) and the kinetic factor (viscosity ratio). By adjusting the loading of PP and SEBS-g-MA, the core−shell particles with suitable size could be obtained, and the notched impact strength of the PA6 blends could be significantly improved. The effects of the loading of PP and SEBS-g-MA on tensile properties were also studied. Consequently, PA6 blends with high tensile strength and excellent impact strength could be obtained by loading only a small amount of SEBS-g-MA.

Fabricating a partial wetting structure for improving the toughness of intumescent flame‐retardant HDPE

“…In the blends of HDPE/LLDPE, the following factors may affect their crystallization behavior: the dilution effect of the LLDPE on the HDPE, the nucleation effect of the HDPE on the LLDPE, and the cocrystallization occurring between them. With HDPE content of greater than 50 wt %, the decisive role of the HDPE component on the T m ‐induced LLDPE content had little effect on the T m .…”

“…The triaxial stress is changed into plane stress via internal cavitation or interfacial debonding. The plane stress initiates shear yielding of the matrix, causing the absorption of significant impact energy . Good interfacial adhesion and suitable elastomer particle size are essential factors for achieving a high impact strength.…”

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.…”

“…It also caused a considerable change in the rheological behavior of the blend. According to Wu et al, toughness and tensile strength can be tailored by adjusting composition of the PA‐6/maleic anhydride–grafted styrene‐ethylene‐butylene‐styrene (SEBS‐ g ‐MA)/polypropylene (PP) blends. Furthermore, the relationship between the morphology and rheological and mechanical properties was studied for the PA‐6/EPDM‐ g ‐MA/HDPE blends by Dou et al Their work revealed the key role of mixing time on the morphology development and corresponding properties.…”