Effect of a Compatibilizer on the Morphology and Properties of Polypropylene/Polyethylentherephthalate Spun Fibers

Abstract

Abstract:Fibers spun by melt spinning of binary and ternary polypropylene/ polyethylenetherephthalate blends have been produced and characterized in order to investigate the effect of a compatibilizer on their morphology and mechanical properties. The compatibilizer was a maleic anhydride-functionalized rubber copolymer. The effect of the compatibilizer was well evident in the isotropic state, as the morphology became very fine, the size of the dispersed particles was very small, and the adhesion was better. The effect of the compatibilizer on the mechanical properties is very relevant, especially in the elongation at break. On the contrary, no relevant effect was observed in the anisotropic oriented fibers. Although the average diameter of the microfibrils of the dispersed phase of the compatibilized blend generated during the hot drawing was much smaller than that of the microfibrils of the same particles of the uncompatibilized blend, the mechanical properties were almost the same. This behavior has been attributed to the length of the smaller microfibrils of the ternary blends, which was lower that of the microfibrils of the binary blend. This has been explained in terms of reduced initial droplet size, and therefore of lesser possibility of stretching the droplets to very long fibrils in these samples.

Hybrid biocomposites from polypropylene, sustainable biocarbon and graphene nanoplatelets

“…However, at 3 and 5 wt.% GnP loading levels, MFI decreased. This was due to significant agglomeration, which reduced lubricating capability and increased viscosity due to the large aspect ratio of GnPs, and is consistent with previous studies 35,36,38 .…”

“…The modulus improvement is supported by the heat deflection temperature (HDT) results in section 3.6.2, as addition of BioC served to prevent polymer chain deformation under load. Addition of compatibilizer diminished the modulus to 2.2 GPa due to its rubbery nature and naturally low elastic modulus 35 . Furthermore, incorporation of GnP significantly improved modulus up to 3 wt.%, with a 41% increase compared to the compatibilized blend.…”

Role of Compatibilizer in Improving the Properties of PLA/PA12 Blends

“…At higher concentrations of PLA-g-MA the fibrillation of PA12 appears to be hindered as can be observed in the highlighted area in Figures 8E,F. This could be due to higher concentration of compatibilizer at the interface limiting the formation of elongated PA12 in the injection molded samples (Mantia et al, 2017;Kuzmanović et al, 2018). This behavior of hindered elongation of PA12 could be related to the slightly lower ductility and impact strength values (260%, 32 kJ/m 2 ) obtained for the blends containing a higher concentration of PLA-g-MA (5 wt.%).…”

Compatibilization of Polypropylene/Polyamide 6 Blend Fibers Using Photo-Oxidized Polypropylene

“…Spectra were measured with 8 scans and a 4 cm −1 resolution. In order to quantitatively compare the spectra of the blends, we considered normalization over the vibration band of –CH 2 – groups (1462 cm −1 ) [24]. The carbonyl concentration was evaluated by considering the peak at 1718 cm −1 and an extinction coefficient of 350 L mol −1 cm −1 [25].…”