Super toughened blends of poly(lactic acid) and poly(butylene adipate-co-terephthalate) injection-molded foams via enhancing interfacial compatibility and cellular structure

Structure-function integrated biodegradable Mg/polymer composites: Design, manufacturing, properties, and biomedical applications

“…The primary process involves the reciprocating motion of the screw in the barrel of an injection molding machine, utilizing frictional heating to melt the incoming thermoplastic resin. Subsequently, the polymer melt is forced into the mold cavity and then cooled for shaping [ 34 ]. Injection molding can process granules and powders, with the final shape of the product determined by the mold, such as cylinder, plate, rod, and film [ 35 ].…”

Simultaneously Enhanced Stereocomplexation and Melt Strength by Dynamic Polylactide toward Heat-Resistant Green Foams

“…Polylactide (PLA), including poly­( l -lactide) (PLLA), poly­( d -lactide) (PDLA), and poly­( dl -lactic acid) (PDLLA) according to their constituent monomer, is a biobased and biodegradable material that is expected to replace petroleum-based polymers . PLA foams can be composted into CO 2 , H 2 O, and biomass after their shelf life, paving the way for green foam to solve the serious problem of plastic pollution. − However, the applications of typical PLLA foam in high temperatures have been significantly blocked by its inferior heat resistance, due to the relatively low melting temperature of homocrystallites (hc), approximately 150–170 °C . The stereocomplex (sc) crystallites formed by PLLA and PDLA have not only stronger interchain interactions but also denser chain packing relative to the hc crystallites of PLLA or PDLA, giving the sc crystallites a higher melting point, heat resistance, mechanical properties, and solvent resistance. − …”