Effect of organoclays on the morphology and thermal expansion of PA6/SEBS alloy

Abstract

The effect of organoclay on phase morphology development of PA6/SEBS alloys had been investigated. PA6/SEBS blends of various compositions, with and without the presence of exfoliated organoclay in the PA6 phase, were prepared and the morphology and thermal expansion of these blends were examined. The results suggested that at compositions where PA6 remains as the matrix domain, the presence of the organoclay had little or no effect upon the blends morphology, PA6/SEBS alloy with SEBS as the matrix could evolve from sea‐island to cocontinuous structure after 5 phr organoclay were added. Significant reduction in the coefficient of linear thermal expansion (CLTE) along theflow direction and furthermore improving the heat distortion temperature of the injection‐molded PA6/SEBS/organoclay ternary nanocomposites was observed due to the formation of a total stable and fine cocontinuous nanolayer structure. POLYM. COMPOS., 2011. © 2011 Society of Plastics Engineers

Relationship between structure and properties in high‐performance PA6/SEBS‐g‐MA/(PPO/PS) blends: The role of PPO and PS

“…The first approach was directly adding elastomers or maleic anhydride grafted elastomers into the PA6 matrix. [9][10][11][12][13][14][15] However, the toughening with elastomer always accompanied with enormous loss in tensile properties and HDT. The second approach was to obtain some "core-shell" toughening particles by skillfully utilizing the interfacial tension in ternary blends during the melting blending process.…”

“…Many attempts have been made in order to improve the impact strength, and these researches can mainly be classified into two types. The first approach was directly adding elastomers or maleic anhydride grafted elastomers into the PA6 matrix . However, the toughening with elastomer always accompanied with enormous loss in tensile properties and HDT.…”

Effect of melt flow on morphology and linear thermal expansion of injection-molded ethylene-propylene-diene terpolymer/isotactic polypropylene blends

“…Recently, we found that when rubber domains are deformed into microlayers and are made co‐continuous with a plastic matrix, the CLTE of the polymer blend parallel to the direction of the microlayers can be reduced to a value less than that of highly filled composites. Our previous work on injection‐molded blends of polyamide 6/styrene–ethylene/butylene–styrene concluded that the large CLTE reduction originates from the characteristics of the microstructure in the following respects: (1) the orientation of polyamide 6 crystalline structure in which the b ‐axis with a negative CLTE orients along the flow direction and (2) the structure of the nanolayer network, which dictates the anisotropic thermal expansion behavior.…”

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

“…However, its low impact strength limits its application. Blending with an elastomer or maleic anhydride grafted elastomer is a common way to improve the impact strength of PA6. − However, the toughening with elastomer always brings the significant decrease of tensile strength.…”