Artigo Acesso aberto Revisado por pares

Feedstock Recycling of Flame-Resisting Poly(lactic acid)/Aluminum Hydroxide Composite to l , l -lactide

2005; American Chemical Society; Volume: 44; Issue: 5 Linguagem: Inglês

10.1021/ie049208+

ISSN

1520-5045

Autores

Haruo Nishida, Yujiang Fan, Tomokazu Mori, Naoko Oyagi, Yoshihito Shirai, Takeshi Endo,

Tópico(s)

Flame retardant materials and properties

Resumo

To achieve the chemical recycling of flame-resisting materials consisted of poly(L-lactic acid) (PLLA), a safer flame-resisting material, PLLA/aluminum hydroxide {Al(OH) 3 } composite, was investigated the feedstock recyclability to optically active monomer L,L-lactide.The thermal stabilization of the composite was improved compared to as-polymerized PLLA and Al(OH) 3 themselves, which makes the melt processing of the composite easier.Nevertheless, at temperatures lower than 300 °C the effective depolymerization of PLLA proceeded, without any racemization reaction, to selectively convert into L,L-lactide, with Al(OH) 3 acting as a catalyst for the depolymerization.This means that the PLLA/Al(OH) 3 composite is capable of reconciling flame resistance with feedstock recycling of PLLA to cyclic monomer.

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