In-Situ Reaction Influenced Polyamide 11 Crystallization in Polymer Blends

Abstract

Two kinds of polymer blends, Polyamide 11(PA11)/Styrene maleic anhydride (SMA) and Polyamide 11/Ethylene vinyl acetate-g-maleic anhydride (EVA-g-MAH), were prepared to study PA11 component crystallization in them. PA11/SMA blends were employed to characterize the in-situ reaction between anhydride group and amine termination of PA11. FT-IR and Solidstate 13 C NMR indicate that PA11-g-SMA graft polymer was in-situ formed at the interface during polymer blending process. DSC measurements show that SMA and EVA-g-MAH decrease the crystallinity and melting point of PA11 component. WAXD illustrates that PA11 crystalline transit from the original d 0 form to a form in the blends. The in-situ reactant also leads to decreased glass transition temperature substantiated by DMA measurements. These graft copolymers are expected to impede the effective packing of PA11 molecules to form crystal as well as changing the crystal pattern way.

Effects of polyamide 12 and chain extender on the properties of microcrystalline cellulose reinforced polyamide 11 composites

“…[1][2][3] Parts of the traditional petroleum-based polymers are gradually replaced by degradable plastics, bio-based polymers, and wood plastic composites (WPCs), and so forth. [4][5][6] WPCs sourced from the waste thermoplastic polymers and natural fibers, are extensively used in the fields of building, transportation, and consumption. [7][8][9] As the commodity thermoplastics, high-density polyethylene (HDPE), polypropylene (PP), and polyvinyl chloride (PVC) had applicable mechanical properties, favorable processability, good resource availability, and high price-performance.…”