Polyethylene adipate

Polyethylene adipate (or PEA), is an aliphatic polyester formed from polyethylene glycol and adipic acid. Its CAS Number 24938-37-2 and its linear formula is [OCH₂CH₂OCO(CH₂)₄CO]n. It forms monoclinic crystals, mp 55C,^[1] and the amorphous material has a low Tg at -70C. However its practical use is mostly as a pre-polymer of polyurethane. It is often blended with other polyesters to form the soft segments. A strain of Penicillium 14-3 can degrade it. Lipases from R. arrizus, R. delemar, Achromobacter sp. and Candida cylindracea; as well as an esterase from hog liver also degraded PEA.^[2]

References

↑ Turner-Jones, A.; Bunn, C. W. (1962). "The crystal structures of polyethylene adipate and polyethylene subarate". Acta Crystallogr. 15: 105–113. doi:10.1107/s0365110x62000316.
↑ Yutaka Tokiwa; Buenaventurada P. Calabia; Charles U. Ugwu; Seiichi Aiba (September 2009). "Biodegradability of Plastics". International Journal of Molecular Sciences. 10: 3722–3742. doi:10.3390/ijms10093722. PMC 2769161. PMID 19865515.

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[1] Turner-Jones, A.; Bunn, C. W. (1962). "The crystal structures of polyethylene adipate and polyethylene subarate". Acta Crystallogr. 15: 105–113. doi:10.1107/s0365110x62000316.

[2] Yutaka Tokiwa; Buenaventurada P. Calabia; Charles U. Ugwu; Seiichi Aiba (September 2009). "Biodegradability of Plastics". International Journal of Molecular Sciences. 10: 3722–3742. doi:10.3390/ijms10093722. PMC 2769161. PMID 19865515.