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

Abstract

The use of polyamide/polyolefin blends has gained importance and concern for years, but they also show some issues to be adequately addressed, such as the incompatibility between the two components. This is usually overcome by using suitable compatibilizers, typically based on functionalized polyolefins. However, there is only little information about the use of a degraded polyolefins to induce compatibilization. This is even truer, as far as polyamide 6/polypropylene (PA6/PP) blends are concerned. In this work, compatibilization of PA6/PP blends by using small amounts of photo-oxidized PP was investigated; furthermore, the effects due to the presence of the photo-oxidized PP were studied also in relationship to the spinning operation, where the existence of the non-isothermal elongational flow can lead to significant, further morphological changes. It was found that isotropic samples showed significant enhancements of the tensile properties upon adding the photo-oxidized PP. Under non-isothermal elongational flow conditions, the presence of the photo-oxidized PP was particularly effective in improving the mechanical properties in comparison to the uncompatibilized blend fibers. Furthermore, an important result was found: The elongational-flow processing allowed obtaining anisotropic samples where the improvements of the properties, in comparison to the isotropic samples, were similar to those achieved by using a compatibilizer.

Effect of ultraviolet and moisture action on biodegradable polymers and their blend

“…Among the thermoplastic polymers typically adopted for outdoor applications, it is worth mentioning polyolefins, polyamides, polyesters, fluorinated polymers, acrylic polymers, silanes, and siloxanes [2][3][4][5][6][7] . In most of the cited cases, the photooxidation resistance is greatly dependent on the formulation and the presence of antioxidant 2,3,8 .…”

Mechanical Characterization of Two Blends PP+PA6+EPDM. Part 2. Results of Tensile Tests

“…In polymeric blends, cavitation occurs at micro and/or macro levels. The cavities are generated in the blend volume, either during cooling after injection of the melt into the mold or due to stresses induced under load [21], [47], [48].…”

Novel approach for the preparation of a compatibilized blend of nylon 11 and polypropylene with polyhydroxybutyrate: Mechanical, thermal, and barrier properties

“…32,33 Due to which the applied force over the PA11/PHB/PP/-PP-g-MA blend during tensile cycle split uniformly over the sample, which results in less deformation with increased strain. In the compatibilized blend, the PA 11 and PP were chemically bonded with maleic anhydride group, and the addition of PHB allows the proper dispersion of PP chain within the PA 11 matrix.…”

“…PHB chain creates an embedded void to which the PP chain can occupy and form a stable morphology of the blend. 32,33 Due to which the applied force over the PA11/PHB/PP/-PP-g-MA blend during tensile cycle split uniformly over the sample, which results in less deformation with increased strain. 34,35 The modulus of tensile and tensile strength is a function of the miscibility of the polymeric chains, and thus to correlate these two mechanical functions tensile strength of PA11/ PP and PA11/PHB/PP blends were computed for their compatibilized and noncompatibilized form.…”