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Melt Phase Polymerization of Racemic Lactide to High‐Performance Poly(Lactic Acid)

Paetz, Caspar / Hagen, Rainer

A process for the production of poly(lactic acid) with a melting point of > 150 °C from racemic lactide was developed. Only process steps that are usable in an industrial process were included to ensure an easy transfer to a commercial scale. A stereoselective catalyst system for lactide melt phase polymerization comprising of an Al‐salen initiator, a hydroxyl cocatalyst and an acidic quenching additive was developed. Monomer recovery aspects, temperature variation and different catalyst concentrations were evaluated to allow for a high yield process which can be transferred to a technical scale.

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Melt Phase Polymerization of Racemic Lactide to High‐Performance Poly(Lactic Acid)

Paetz, Caspar / Hagen, Rainer

A process for the production of poly(lactic acid) with a melting point of > 150 °C from racemic lactide was developed. Only process steps that are usable in an industrial process were included to ensure an easy transfer to a commercial scale. A stereoselective catalyst system for lactide melt phase polymerization comprising of an Al‐salen initiator, a hydroxyl cocatalyst and an acidic quenching additive was developed. Monomer recovery aspects, temperature variation and different catalyst concentrations were evaluated to allow for a high yield process which can be transferred to a technical scale.

Melt Phase Polymerization of Racemic Lactide to High‐Performance Poly(Lactic Acid)

Paetz, Caspar / Hagen, Rainer

A process for the production of poly(lactic acid) with a melting point of > 150 °C from racemic lactide was developed. Only process steps that are usable in an industrial process were included to ensure an easy transfer to a commercial scale. A stereoselective catalyst system for lactide melt phase polymerization comprising of an Al‐salen initiator, a hydroxyl cocatalyst and an acidic quenching additive was developed. Monomer recovery aspects, temperature variation and different catalyst concentrations were evaluated to allow for a high yield process which can be transferred to a technical scale.

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Title:

Melt Phase Polymerization of Racemic Lactide to High‐Performance Poly(Lactic Acid)

Contributors:

Paetz, Caspar (author) / Hagen, Rainer (author)

Published in:

Chemie Ingenieur Technik ; 86 ; 519-523

Publication date:

2014-04-01

Size:

5 pages

ISSN:

0009-286X , 1522-2640

DOI:

https://doi.org/10.1002/cite.201300126

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

Lactide , Lactic acid , Stereoselective catalysis , Al‐salen , Melt phase polymerization , Poly(lactic acid)

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