The effect of a succinic anhydride/succinil-fluoresceine grafted atactic polypropylene on polypropylene/polyamide 6 blends at the polypropylene glass transition as revealed by dynamic mechanical analysis

Industrial waste origin succinic anhydride‐grafted atactic polypropylene as compatibilizer of full range polypropylene/polyamide 6 blends as revealed by dynamic mechanical analysis at the polypropylene glass transition

“…It is well accepted that this transition is related to the cooperative chain segments motion on "free" amorphous phase of the polymer, and is characterized for being wherein short-range diffusive motions at the chain level occur (besides the very low dissipation capability due to mere atomic vibration motions) [23,25,[33][34][35]. In our case, we have measured this from the loss factor or tan δ (tan δ = E"/E') peaks, and a value of 8.2 C was found for the neat iPP [17,36]. This transition is related to the cooperative chain segments motion on "free" amorphous phase of the polymer.…”

“…However, once surpassed the 50/50 iPP/PA6 coordinate the viscous behavior (E") that strongly change the pattern by showing a complex behavior. In any case, it is clear that values for iPP higher than 30% E" give values lower than that of the neat iPP (E" = 95.5 MPa) reported elsewhere [17,36], indicating that the viscous response of the iPP/PA6 (and so its impact behavior) [32] is expected to occur with values for iPP higher than this threshold. It is well worth to notice that at this point, the iPP phase is still acting as the dispersed phase and not as the matrix.…”

“…Moreover, this type of evolution informs about the existence of an optimal coordinate in the experimental space scanned [27]. First, it can be observed that the values for E' for whatever the blend considered are always higher than that of the neat iPP (E' = 1,567 MPa) [17,36]. In our case, we observe quite close isolines for values below 20% in iPP (80% in PA6) and above 60% in iPP, indicating that at such concentration, the influence of iPP content on the T g changes rapidly indicating that E' at the glass transition is very sensitive to the iPP content.…”

The effect of a p‐phenylen‐bis‐maleamic acid grafted atactic polypropylene interfacial agent on the dynamic‐mechanical properties of iPP/Mica composites measured at the polymer transitions

“…Therefore, the DMA responses in this transition depend not only of the amorphous to crystalline ratio, but as how both phases are dynamically connected. Hence, this is strongly dependent on the way the polymer has been solidified, or in other words, on the molding step . In fact, the contour map in Fig.…”

The effect of a p‐phenylen‐bis‐maleamic acid grafted atactic polypropylene interface agent on the impact properties of iPP/mica composites

“…Consequently, the interphase between components is weak. The use of interface agents to promote the interactions between the components in heterogeneous materials based on polymers as polymer composites, or polymer blends and alloys is one of the best options to strength the interphase . Since the interphases are the key in the final properties of composite materials, and although very much effort has been made in the study of the interface, there is still much work to do to improve these .…”