Effects of reactive functional groups in the compatibilizer on mechanical properties of compatibilized blends

Abstract

SYNOPSISThe compatibility of blends of polyamide-6/ [styrene-(ethylene-butylene) -styrene] triblock copolymer (SEBS) was enhanced with a compatibilizer, maleated SEBS, whose compositions were varied from 0 to 4 wt % of the blends. The maleated SEBS ( MA-g-SEBS) was synthesized by reacting (grafting) maleic anhydride (MA) with SEBS in the laboratory at various maleic anhydride concentrations ranging from 8 to 13 wt % of the maleated compatibilizer. The effects of graft levels of the reactive MA functional group in the compatibilizer on the effectiveness in compatibilizing the blends were investigated. The morphology and the impact strengths of the compatibilized blends were determined. It was found that, depending on the maleated extents, the compatibilizer influenced significantly the properties of the blends. Although the maleated extents (graft ratios) of the compatibilizer is influential, the concentrations of the compatibilizer in the blends more sensitively affected the mechanical properties of the compatibilized blends. In summary, this study has shown that by increasing the MA contents (within the reported window) in the compatibilizer, the impact toughness could be more dramatically improved. 0 1994 John Wiley & Sons, Inc.

Compatibilization of a poly(butylene terephthalate)/poly(ethylene octene) copolymer blends with different amounts of an epoxy resin

“…The decrease in the rubber particle size observed up to 1.0% epoxy content agreed with the higher interactions at the interface expected as a consequence of the observed grafting reactions 9, 20, 21, 26, 27, 56, 57. This is because larger epoxy contents should lead to an increase in the number of functional groups, leading to a higher probability of interaction.…”

Grafting of diethyl maleate and maleic anhydride onto styrene- b -(ethylene- co -1-butene)- b -styrene triblock copolymer (SEBS)

“…[6]. However, both in the case of SEBS and LLDPE/PS mixture, having the same composition as SEBS, only the aliphatic radical appears to take part in the grafting reaction.…”

“…Many reports are devoted to the study of the properties of polyamide/functionalized-SEBS blends [4][5][6][7][8] and in general an increase of mechanical properties is observed when SEBS-g-MAH as compatibilizer was used. This grafted copolymer seems to be a better compatibilizer than a similarly functionalized polyolefin such as EPR-g-MAH.…”

Morphology, thermal behavior, and mechanical properties of PA6/UHMWPE blends with HDPE-g-MAH as a compatibilizing agent

“…The final properties of these blends are strongly affected by the volume fraction of the components, the size and shape of domains, and the interfacial tension and adhesion between the two phases. Many publications [1][2][3][4][5][6][7] reported that the presence of a block or graft copolymer, which has similar structure or can react chemically with the blending components, could provide lowering of the interfacial energy, improvement of the interfacial adhesion between the two phases, and reduction of the size of dispersed particles in the blends.…”