Copolymerisation of β-butyrolactone and γ-butyrolactone using yttrium amine bis(phenolate) catalysts

Chemistry

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https://doi.org/10.1002/pi.6429
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Keywords

⊎-butyrolactone, γ-butyrolactone, ring-opening polymerisation, yttrium catalysts

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Research output: Contribution to Journal/Magazine › Journal article › peer-review

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Copolymerisation of β-butyrolactone and γ-butyrolactone using yttrium amine bis(phenolate) catalysts. / Catchpole, Pip ; Platel, Rachel H.
In: Polymer International, Vol. 71, No. 12, 31.12.2022, p. 1409-1417.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Bibtex

@article{b0d650c60261427e8318e58e592ee941,

title = "Copolymerisation of β-butyrolactone and γ-butyrolactone using yttrium amine bis(phenolate) catalysts",

abstract = "The synthesis of poly(3-hydroxbutyrate-co-4-hydroxybutyrate) is reported with a family of yttrium amine bis(phenolate) catalysts via ring-opening polymerisation of β-butyrolactone and γ-butyrolactone. Poly(3-hydroxybutyrate), poly(4-hydroxybutyrate) and poly(3-hydroxybutyrate-co-4-hydroxybutyrate) were prepared at −40 °C with a 10 mol L −1 monomer concentration using a range of amine bis(phenolate) catalysts. It was found that poly(3-hydroxybutyrate) synthesis is inferior under these conditions to that attainable at room temperature. In contrast, poly(4-hydroxybutyrate) synthesis achieved up to 33% conversion under these conditions. Poly(3-hydroxybutyrate) polymers containing up to 63% 4-hydroxybutyrate inclusion were obtained when β-butyrolactone and γ-butyrolactone were copolymerised, with γ-butyrolactone in excess in the monomer feed. The carbonyl resonances between 169 and 174 ppm in the 13C NMR spectra of this copolymer were assigned. Gel permeation chromatography of the copolymers showed that the number-average molecular weights are consistently greater than the calculated values, and the dispersities are generally greater than 1.4, demonstrating limited control by the catalysts. Despite this restricted control, these catalysts were able to convert appreciable amounts of monomers into polymers either individually or within a copolymerisation.",

keywords = "⊎-butyrolactone, γ-butyrolactone, ring-opening polymerisation, yttrium catalysts",

author = "Pip Catchpole and Platel, {Rachel H.}",

year = "2022",

month = dec,

day = "31",

doi = "10.1002/pi.6429",

language = "English",

volume = "71",

pages = "1409--1417",

journal = "Polymer International",

issn = "0959-8103",

publisher = "Wiley",

number = "12",

}

RIS

TY - JOUR

T1 - Copolymerisation of β-butyrolactone and γ-butyrolactone using yttrium amine bis(phenolate) catalysts

AU - Catchpole, Pip

AU - Platel, Rachel H.

PY - 2022/12/31

Y1 - 2022/12/31

N2 - The synthesis of poly(3-hydroxbutyrate-co-4-hydroxybutyrate) is reported with a family of yttrium amine bis(phenolate) catalysts via ring-opening polymerisation of β-butyrolactone and γ-butyrolactone. Poly(3-hydroxybutyrate), poly(4-hydroxybutyrate) and poly(3-hydroxybutyrate-co-4-hydroxybutyrate) were prepared at −40 °C with a 10 mol L −1 monomer concentration using a range of amine bis(phenolate) catalysts. It was found that poly(3-hydroxybutyrate) synthesis is inferior under these conditions to that attainable at room temperature. In contrast, poly(4-hydroxybutyrate) synthesis achieved up to 33% conversion under these conditions. Poly(3-hydroxybutyrate) polymers containing up to 63% 4-hydroxybutyrate inclusion were obtained when β-butyrolactone and γ-butyrolactone were copolymerised, with γ-butyrolactone in excess in the monomer feed. The carbonyl resonances between 169 and 174 ppm in the 13C NMR spectra of this copolymer were assigned. Gel permeation chromatography of the copolymers showed that the number-average molecular weights are consistently greater than the calculated values, and the dispersities are generally greater than 1.4, demonstrating limited control by the catalysts. Despite this restricted control, these catalysts were able to convert appreciable amounts of monomers into polymers either individually or within a copolymerisation.

AB - The synthesis of poly(3-hydroxbutyrate-co-4-hydroxybutyrate) is reported with a family of yttrium amine bis(phenolate) catalysts via ring-opening polymerisation of β-butyrolactone and γ-butyrolactone. Poly(3-hydroxybutyrate), poly(4-hydroxybutyrate) and poly(3-hydroxybutyrate-co-4-hydroxybutyrate) were prepared at −40 °C with a 10 mol L −1 monomer concentration using a range of amine bis(phenolate) catalysts. It was found that poly(3-hydroxybutyrate) synthesis is inferior under these conditions to that attainable at room temperature. In contrast, poly(4-hydroxybutyrate) synthesis achieved up to 33% conversion under these conditions. Poly(3-hydroxybutyrate) polymers containing up to 63% 4-hydroxybutyrate inclusion were obtained when β-butyrolactone and γ-butyrolactone were copolymerised, with γ-butyrolactone in excess in the monomer feed. The carbonyl resonances between 169 and 174 ppm in the 13C NMR spectra of this copolymer were assigned. Gel permeation chromatography of the copolymers showed that the number-average molecular weights are consistently greater than the calculated values, and the dispersities are generally greater than 1.4, demonstrating limited control by the catalysts. Despite this restricted control, these catalysts were able to convert appreciable amounts of monomers into polymers either individually or within a copolymerisation.

KW - ⊎-butyrolactone

KW - γ-butyrolactone

KW - ring-opening polymerisation

KW - yttrium catalysts

U2 - 10.1002/pi.6429

DO - 10.1002/pi.6429

M3 - Journal article

VL - 71

SP - 1409

EP - 1417

JO - Polymer International

JF - Polymer International

SN - 0959-8103

IS - 12

ER -

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