Molecular dynamics and mechanical properties correlations of PA6/PPO blends compatibilized with SMA

Abstract

The effects of the compatibilizer, styrene maleic anhydride (SMA‐8% MA) upon the change of morphology and molecular dynamics of polyamide‐6 (PA6) and poly (2,6‐dimethyl‐1,4‐phenylene oxide) (PPO) blends were investigated by means of solid‐state NMR techniques. With increasing amounts of SMA, the domains correspond to PA6 and PPO are reduced and the polymer segmental mobility increased. The correlation between NMR relaxation time, T italicH1ρ, and the bulk mechanical properties provide a molecular level understanding of the modification of molecular dynamics by the compatibilizer (SMA). The correlation shows that the tensile strength is governed mainly by the morphology, but modulated by the PA6 crystallinity, while the tensile elongation and impact strength are closely affected by both the molecular mobility and morphology. The annealing process improved only the tensile strength, but deteriorated tensile elongation and impact strength due to the increase of PA6 crystallinity, which induced phase separation after annealing. This study raised an important point that the polymer mechanical properties are most sensitive to the molecular structure and dynamics take place within the range of 20 Å to few hundred Å. © 1999 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 37: 1155–1163, 1999

Compatibilization of polyamide 6/poly(2,6-dimethyl-1,4-phenylene oxide) blends by poly(styrene-co-maleic anhydride)

“…During the last decade, extensive research has been carried out in areas of compatibilization of the nylon/ PPO blends [11][12][13][14][15][16][17][18]. Blends of a PPO/PA6 alloy toughened with a novel polyolefin elastomer, poly(ethylene-1-octene) (POE), were prepared via melt extrusion [6].…”

Exploring the effects of montmorillonite and halloysite nanotubes on mechanical, optical and barrier properties of poly (butylene adipate‐co‐terephthalate) blown films: Implications for sustainable packaging and food storage

“…However, at lower concentrations, there is a strong interaction between the polymer and clay particles, resulting in effective stress transfer from the PBAT matrix to MMT and HNT. Furthermore, the addition of clays enhances the crystallinity degree of PBAT, which impacts the tensile strength of the films as crystalline regions act as mechanical reinforcement 42 …”

“…Furthermore, the addition of clays enhances the crystallinity degree of PBAT, which impacts the tensile strength of the films as crystalline regions act as mechanical reinforcement. 42 From Figure 6 it is observed that the elongation at break of pure PBAT is 309% and 475% in the machine and transverse direction, respectively. Typically, the addition of reinforcing particles leads to a decrease in this property of plastic films.…”

Compatibilization of poly(2,6‐dimethyl‐1,4‐phenylene oxide)/polyamide 6 blends with styrene–maleic anhydride copolymer: Mechanical properties, morphology, crystallization, and melting behavior

“…Dedecker and Groeninckk5 also used SMA (8 wt % MA) as a compatibilizer for PPO/PA and studied the reactions between PA6 and SMA. Chu et al14 studied the correlation between the molecular dynamics and mechanical properties of PPO/PA compatibilized by SMA (8 wt % MA). The addition of SMA reduced the size of dispersed phase (PA) and increased the interfacial contact area, leading to the increase in the tensile strength and unnotched impact strength 14…”