Change search
ReferencesLink to record
Permanent link

Direct link
Modulating the thermal properties of poly(hydroxybutyrate) by the copolymerization of rac-beta-butyrolactone with lactide
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology. University of Sannio, Italy.
2016 (English)In: New Journal of Chemistry, ISSN 1144-0546, E-ISSN 1369-9261, Vol. 40, no 9, 7671-7679 p.Article in journal (Refereed) Published
Abstract [en]

Biobased poly(hydroxybutyrate) is produced by microorganisms under controlled conditions. It is a linear, high molecular weight, fully isotactic and highly crystalline polymer. However, it has poor mechanical and thermal properties. We have modulated the thermal properties of this material by ring-opening co-polymerization of rac-beta-butyrolactone (BL) with lactide (LA) in the presence of salan-based yttrium and aluminum catalysts. The prepared poly(hydroxybutyrate-co-lactide) copolymers were characterized by proton and carbon nuclear magnetic resonance (H-1 and C-13 NMR), size exclusion chromatography (SEC) and differential scanning calorimetry (DSC) analyses. The salan-yttrium compound was a more effective catalyst compared to the aluminum compound, affording high molecular weight copolymers with higher monomer conversion and a monomodal distribution of the molecular weights. The kinetic experiments showed a higher rate of polymerization for the LA with respect to the BL. The copolymers were amorphous and DSC showed unique transition temperatures for all of the samples. The formation of a gradient copolymer is proposed.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2016. Vol. 40, no 9, 7671-7679 p.
National Category
Polymer Chemistry
URN: urn:nbn:se:kth:diva-193865DOI: 10.1039/c6nj00298fISI: 000382820000054ScopusID: 2-s2.0-84985041093OAI: diva2:1034492
VINNOVA, 291795Swedish Research Council, 621-2013-3764

QC 20161012

Available from: 2016-10-12 Created: 2016-10-11 Last updated: 2016-10-12Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Fagerland, JennyFinne-Wistrand, AnnaPappalardo, Daniela
By organisation
Fibre and Polymer Technology
In the same journal
New Journal of Chemistry
Polymer Chemistry

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

ReferencesLink to record
Permanent link

Direct link