Copolymerization of glycolic, D,L-lactic and D,L-2-hydroxybutyric acid mixtures present in kraft black liquors

Tuomas Mehtiö (Corresponding Author), Leena Nurmi, Virpi Rämö, Ali Harlin, Jarmo Ropponen

Research output: Contribution to journalArticleScientificpeer-review

9 Citations (Scopus)

Abstract

A series of copolymers of glycolic acid (GA), d,l-lactic acid (dl-LA) and d,l-2-hydroxybutyric acid (dl-2HBA) were prepared via melt condensation polymerization. The utilized monomers represent mixtures that are present and potentially obtainable from kraft black liquor by fractionation. Polymerizations were performed in 165 °C at nitrogen atmosphere and reduced pressure using stannous octoate as catalyst. Copolymerizations were conducted with varying dl-2HBA content in order to observe how the presence of the dl-2HBA monomer affects the properties of the polymers. Prepared copolymers were characterized with 1H NMR and 13C NMR, size exclusion chromatography, differential scanning calorimetry and thermogravimetric analysis. The obtained copolymers had molecular weights between Mw = 3500-10,000 g/mol. dl-2HBA had a lowering effect on the glass transition temperatures and molecular weights of the copolymers. However, significant lowering of molecular weight was observed only when the amount of dl-2HBA in the feed exceeded 60%. The results indicate that dl-2HBA can be copolymerized with GA and dl-LA and therefore the corresponding kraft black liquor fractions can be utilized for polymerizations.
Original languageEnglish
Pages (from-to)774-778
Number of pages5
JournalEuropean Polymer Journal
Volume48
Issue number4
DOIs
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed

Fingerprint

copolymerization
Copolymerization
glycolic acid
acids
Acids
Copolymers
copolymers
Molecular weight
molecular weight
lactic acid
polymerization
Lactic Acid
Lactic acid
Monomers
Polymerization
Nuclear magnetic resonance
Size exclusion chromatography
monomers
Polycondensation
Fractionation

Keywords

  • Polycondensation
  • polyester
  • biodegradable polymer
  • biobased polymer

Cite this

@article{551d8d0d87084989bd5d3c3a5cc8b9ce,
title = "Copolymerization of glycolic, D,L-lactic and D,L-2-hydroxybutyric acid mixtures present in kraft black liquors",
abstract = "A series of copolymers of glycolic acid (GA), d,l-lactic acid (dl-LA) and d,l-2-hydroxybutyric acid (dl-2HBA) were prepared via melt condensation polymerization. The utilized monomers represent mixtures that are present and potentially obtainable from kraft black liquor by fractionation. Polymerizations were performed in 165 °C at nitrogen atmosphere and reduced pressure using stannous octoate as catalyst. Copolymerizations were conducted with varying dl-2HBA content in order to observe how the presence of the dl-2HBA monomer affects the properties of the polymers. Prepared copolymers were characterized with 1H NMR and 13C NMR, size exclusion chromatography, differential scanning calorimetry and thermogravimetric analysis. The obtained copolymers had molecular weights between Mw = 3500-10,000 g/mol. dl-2HBA had a lowering effect on the glass transition temperatures and molecular weights of the copolymers. However, significant lowering of molecular weight was observed only when the amount of dl-2HBA in the feed exceeded 60{\%}. The results indicate that dl-2HBA can be copolymerized with GA and dl-LA and therefore the corresponding kraft black liquor fractions can be utilized for polymerizations.",
keywords = "Polycondensation, polyester, biodegradable polymer, biobased polymer",
author = "Tuomas Mehti{\"o} and Leena Nurmi and Virpi R{\"a}m{\"o} and Ali Harlin and Jarmo Ropponen",
year = "2012",
doi = "10.1016/j.eurpolymj.2012.01.010",
language = "English",
volume = "48",
pages = "774--778",
journal = "European Polymer Journal",
issn = "0014-3057",
publisher = "Elsevier",
number = "4",

}

Copolymerization of glycolic, D,L-lactic and D,L-2-hydroxybutyric acid mixtures present in kraft black liquors. / Mehtiö, Tuomas (Corresponding Author); Nurmi, Leena; Rämö, Virpi; Harlin, Ali; Ropponen, Jarmo.

In: European Polymer Journal, Vol. 48, No. 4, 2012, p. 774-778.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Copolymerization of glycolic, D,L-lactic and D,L-2-hydroxybutyric acid mixtures present in kraft black liquors

AU - Mehtiö, Tuomas

AU - Nurmi, Leena

AU - Rämö, Virpi

AU - Harlin, Ali

AU - Ropponen, Jarmo

PY - 2012

Y1 - 2012

N2 - A series of copolymers of glycolic acid (GA), d,l-lactic acid (dl-LA) and d,l-2-hydroxybutyric acid (dl-2HBA) were prepared via melt condensation polymerization. The utilized monomers represent mixtures that are present and potentially obtainable from kraft black liquor by fractionation. Polymerizations were performed in 165 °C at nitrogen atmosphere and reduced pressure using stannous octoate as catalyst. Copolymerizations were conducted with varying dl-2HBA content in order to observe how the presence of the dl-2HBA monomer affects the properties of the polymers. Prepared copolymers were characterized with 1H NMR and 13C NMR, size exclusion chromatography, differential scanning calorimetry and thermogravimetric analysis. The obtained copolymers had molecular weights between Mw = 3500-10,000 g/mol. dl-2HBA had a lowering effect on the glass transition temperatures and molecular weights of the copolymers. However, significant lowering of molecular weight was observed only when the amount of dl-2HBA in the feed exceeded 60%. The results indicate that dl-2HBA can be copolymerized with GA and dl-LA and therefore the corresponding kraft black liquor fractions can be utilized for polymerizations.

AB - A series of copolymers of glycolic acid (GA), d,l-lactic acid (dl-LA) and d,l-2-hydroxybutyric acid (dl-2HBA) were prepared via melt condensation polymerization. The utilized monomers represent mixtures that are present and potentially obtainable from kraft black liquor by fractionation. Polymerizations were performed in 165 °C at nitrogen atmosphere and reduced pressure using stannous octoate as catalyst. Copolymerizations were conducted with varying dl-2HBA content in order to observe how the presence of the dl-2HBA monomer affects the properties of the polymers. Prepared copolymers were characterized with 1H NMR and 13C NMR, size exclusion chromatography, differential scanning calorimetry and thermogravimetric analysis. The obtained copolymers had molecular weights between Mw = 3500-10,000 g/mol. dl-2HBA had a lowering effect on the glass transition temperatures and molecular weights of the copolymers. However, significant lowering of molecular weight was observed only when the amount of dl-2HBA in the feed exceeded 60%. The results indicate that dl-2HBA can be copolymerized with GA and dl-LA and therefore the corresponding kraft black liquor fractions can be utilized for polymerizations.

KW - Polycondensation

KW - polyester

KW - biodegradable polymer

KW - biobased polymer

U2 - 10.1016/j.eurpolymj.2012.01.010

DO - 10.1016/j.eurpolymj.2012.01.010

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