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

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

To achieve the chemical recycling of flame-resisting materials consisting of poly(l-lactic acid) (PLLA), a safer flame-resisting material, PLLA/aluminum hydroxide {Al(OH)3} composite, was investigated the capability of the feedstock recyclability to optically active monomer l,l-lactide. The thermal...

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Veröffentlicht in:Industrial & engineering chemistry research 2005-03, Vol.44 (5), p.1433-1437
Hauptverfasser: Nishida, Haruo, Fan, Yujiang, Mori, Tomokazu, Oyagi, Naoko, Shirai, Yoshihito, Endo, Takeshi
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Chemical engineering
Exact sciences and technology
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container_end_page 1437
container_issue 5
container_start_page 1433
container_title Industrial & engineering chemistry research
container_volume 44
creator Nishida, Haruo
Fan, Yujiang
Mori, Tomokazu
Oyagi, Naoko
Shirai, Yoshihito
Endo, Takeshi
description To achieve the chemical recycling of flame-resisting materials consisting of poly(l-lactic acid) (PLLA), a safer flame-resisting material, PLLA/aluminum hydroxide {Al(OH)3} composite, was investigated the capability of the feedstock recyclability to optically active monomer l,l-lactide. The thermal stabilization of the composite was improved compared to those of 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.
doi_str_mv 10.1021/ie049208+
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title Feedstock Recycling of Flame-Resisting Poly(lactic acid)/Aluminum Hydroxide Composite to l,l-lactide
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