DOX mediated synthesis of PLA-co-PS graft copolymers with matrix-driven self-assembly in PLA-based blends

QC 20230612
Intriguing phase morphology was formed through self-assembly of polylactide-polystyrene (PLA-co-PS) graft copolymers blended with polylactide (PLA). PLA-co-PS graft copolymers were synthesized by exploiting a styrene-functionalized 1,3-Dioxolan-4-one (StyDOX) monomer through a two-step procedure and their structure was confirmed. Different amounts of PLA-co-PS and commercial PLA were solution cast to blend films. Etching of amorphous PLA revealed the presence of spherical micrometer sized domains dispersed within the films, arising from the self-assembly behavior of PLA-co-PS caused by the immiscibility of PS-grafts in the PLA matrix. EDS and IR imaging analyses further revealed that these microspheres were characterized by a PS-rich core opposed to the PLA-rich outer shell, which is expected to be miscible and able to form favorable interactions with the PLA matrix. PLA/PS blends were also prepared with different loadings of PLA-co-PS. The ability of PLA-co-PS to compatibilize the two phases was assessed through rheological analyses. Finally, the possibility to chemically recycle the copolymer was evaluated.

Adolfsson, Karin H.KTH,Fiber- och polymerteknologi(Swepub:kth)u1d4klhj (författare)
Hakkarainen, MinnaKTH,Polymerteknologi(Swepub:kth)u14e229n (författare)
Farina, H. (författare)
Silvani, A. (författare)
Ortenzi, M. A. (författare)
KTHFiber- och polymerteknologi (creator_code:org_t)

Av författaren/redakt...: Gazzotti, Stefan ...; Adolfsson, Karin ...; Hakkarainen, Min ...; Farina, H.; Silvani, A.; Ortenzi, M. A.

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