Processability of polysulfone improved by adding polyamide 6 and polysulfone‐polyamide 6 block copolymer

Abstract

Although polysulfone (PSU) is a potential thermoplastic engineering plastic with high heat resistance, good dimensional stability and excellent mechanical properties, its poor processability has greatly restricted its application in electrical, aerospace, and medical fields. In this work, polyamide 6 (PA6) and PSU‐PA6 block copolymer (PSU‐b‐PA6) were used to improve the processibility and formability of PSU depending on their excellent fluidity and good compatibility between two components. Furthermore, the fluidity, thermal and mechanical properties of the blends were carefully investigated. It was found that, melt flow index of PSU could be increased above 10 times, and strength and toughness could be enhanced by 4–10% with the introduction of 10 wt % PA6 and PSU‐b‐PA6 without compromising the heat resistance of PSU obviously. The processing conditions of PSU could be improved while maintaining a decent comprehensive performance. Thus, the method has great potential for extending the applications of PSU. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 41139.

Forward‐osmosis‐aided concentration of fructose sugar through hydrophilized polyamide membrane: Molecular modeling and economic estimation

“…The corresponding peak around 1655.14 cm −1 denotes strong carbonyl (CO) stretching vibrations of the amide group, while a strong in‐plane bending vibration arising from aromatic NH 2 scissoring occurs at 1608.08 cm −1 and 1411.94 cm −1 . Additionally, the bands at 1246.15 cm −1 and 1107.13 cm −1 denote the OSO and COC asymmetric stretching vibrations of the polyethersulfone layer, respectively . The peaks at 2965.13 cm −1 and 2907.94 cm −1 represent CH stretching vibrations in both polyamide and polyethersulfone, respectively.…”

Ferrocene-Based Terpolyamides and Their PDMS-Containing Block Copolymers: Synthesis and Physical Properties

“…Aromatic diamine is one of the major building blocks to tailor the properties of the synthesized polyamides [ 12 , 13 ]. Various aromatic diamines possessing flexible spacers such as ether, methylene, and sulfone were incorporated into the polymer backbone to improve the flexibility of the polymer chains and hence their processability, along with maintaining their structure–property relationship [ 12 , 14 ].…”