Compatibilization of PP/Vectra B “in situ” composites by means of an ionomer

Synthesis of compatibilizers and characterization of the compatibilized and noncompatibilized blends of PP/Rodrun LC3000

“…7(a)]. Although the increase in the Young's modulus obtained by the addition of compatibilizers A, B, and C are from the same order of those obtained in the past by other researchers, with different compatibilizers, 18,30 as can be seen in Table I, we should point out that the mechanical improvement (in what concerns the Young's modulus) of the blend with compatibilizer C can, under appropriate processing conditions, be increased from 27 to 38%, with respect to the noncompatibilized blend. 29 In fact, the application of a lower screw speed, 100 rpm, revealed to be beneficial for the fibrillation process, giving rise to blends with a higher Young's modulus, than those obtained for a screw speed of 150 rpm.…”

“…The increase of the Young's modulus of our blend with compatibilizer C is also higher than the ones obtained in the past by other researchers with different compatibilizers. 18,30 We must point out, however, that the Young's modulus of blends compatibilized with 4 wt % of compatibilizer E (which is the optimum content of this compatibilizer for our blend, contrary to what happens to the optimum content of compatibilizer C, which is 2 wt %, as we have proved in another work 27 ) becomes slightly higher than the Young modulus of the blend with 2 wt % of compatibilizer C.…”

In situ gradient nano-scale fibril formation during polypropylene (PP)/polystyrene (PS) composite fine fiber processing

“…Lots of these investigations concerned the PET/TCLP blend fibers [11,12]. By contrast, only a few papers about PP composite fibers have been published to date, but PP is already wildly interesting to use as the matrix for in situ composites by extrusion and molding process [13] because of its several excellent properties coupled with a low price, which will be not discussed here. For PP composite fibers with fibrillar phase morphology, the spinning experiments can be divided two kinds, one is carried out on blends of PP and TLCP for in situ composite, the other is related to blends of PP and TP.…”

Effect of in-situ formed core–shell inclusions on the mechanical properties and impact fracture of polypropylene

“…The use of block copolymers with segments capable of specific interactions with the individual components is of particular relevance to the work described in this paper [29][30][31][32] to obviate the compatibility issue. Graft copolymers of a TLCP with poly(ethylene-r-acrylic acid) ionomer (EAA) partially neutralized to the Na + -salt (NaEAA) were prepared previously [33][34][35][36].…”