Mixtures poly((R)-3-hydroxybutyrate) and poly(l-lactic acid) subjected to DSC View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2011-02

AUTHORS

Lenka Malinová, Jiří Brožek

ABSTRACT

Blends of bacterial poly((R)-3-hydroxybutyrate) (PHB) and poly(l-lactic acid) (PLLA) synthesized by polycondensation of l-lactic acid or by ring-opening polymerization of l-lactide were studied. Miscibility was investigated through both conventional differential scanning calorimetry (DSC) and temperature-modulated DSC (TMDSC). PHB and low-molar mass PLLA were miscible in a whole concentration range, and a single glass transition temperature was observed. On the other hand, PHB/high-molar mass PLLA mixtures phase separate, giving rise to two glass transition temperatures corresponding to PHB and PLLA. A treatment of blends at 190 °C leads to formation of block/multiblock/random copolymers, and blends become miscible. More... »

PAGES

653-660

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s10973-010-1092-2

DOI

http://dx.doi.org/10.1007/s10973-010-1092-2

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1000513995


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