Towards scalable production of polyamide 12/halloysite nanocomposites via water‐assisted extrusion: mechanical modeling, thermal and fire properties

摘要: In this study, polyamide 12 (PA12)/untreated halloysite nanotubes (HNTs) nanocomposites are prepared in a semiindustrial scale extruder using non-traditional “one step” water-assisted extrusion process. A morphological study is carried out combination of scanning electron microscopy and transmission analyses to evaluate the influence water injection filler content on quality clay dispersion. The use slightly improves nanoscale dispersion at low HNTs (<8 wt.%), while effect more pronounced higher loading (16 wt.%). mechanism explaining physico-chemical action during proposed. materials characterized with respect their mechanical, thermo-mechanical, thermal fire properties. strong correlation found between nanostructure physical properties; uniform nanotubes, mechanical reinforcement, stability retardancy PA12 nanocomposites. Tensile tests results interpreted terms three models: Halpin–Tsai’s model for stiffness interfacial strength Pukanszky’s equation yield strength. Linear fits experimental data confirm that superior reinforcement from improved better adhesion HNTs. view these promising results, proposed direct melt compounding method could be easily scaled-up towards production PA12–HNTs an industrial scale.