Compatibility and interactions in polyacrylonitrile/soy protein isolate/polyurethane blends

Abstract

Polyacrylonitrile/Soy protein isolate/polyurethane (PAN/SPI/PU) blends were prepared in dimethylsulfoxide (DMSO). The compatibility and interactive properties of PAN/SPI, SPI/PU, and PAN/PU blend systems were studied using dilute solution viscometry and phase contrast microscopy. It was found that PAN/SPI and PAN/PU were immiscible systems, but that there was an attractive interaction between them. However, the SPI/PU was an almost miscible system. To improve compatibility, the main product of graft copolymerization of acrylonitrile and SPI (AN-g-SPI) and the alkaline hydrolysis polyacrylonitrile (HPAN) were used as compatibilizers. The results showed that the mechanical properties of both the PAN/SPI and PAN/SPI/PU systems were significantly improved.

Effects of Soy Protein on the Crystallization and Dielectric Properties of PEG/PEG Copolymers

“…For example, maleic anhydride grafted polyesters were used as compatibilizers to enhance the compatibility of SP and biodegradable polyesters 19. Hydrolyzed polyacrylonitrile (PAN) and acrylonitrile‐grafted soybean protein isolate (AN‐ graft ‐SPI) were synthesized to improve the compatibility between PAN and SPI 20. Another kind of compatibilizer is reactive functional additives.…”