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|Type:||Artigo de periódico|
|Title:||Obtention and characterization of poly(3-hydroxybutyricacid-co-hydroxyvaleric acid)/mcl-PHA based blends|
de Meyer, B
|Abstract:||The aim of this work was to evaluate the physical-chemical properties of blends of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and a medium-chain-length polyhydroxyalkanoate (LA). Blends were obtained by casting film-solution on leveled trays. Morphological analysis showed compatibility between the two polymers up to 5 g/100 g of LA polymer was added and phase separation in the polymeric system for compositions containing more than 5 g/100 g of LA polymer. TGA data and glass transition temperatures revealed some compatibility of the polymers. Moreover, there is a significant decrease of melting temperature and elasticity modulus for PHBV LA blends with composition. Films containing 5 g/100 g of LA polymer showed an improvement of 50% in elongation to break (SB) when compared with pure PHBV. For other samples the SB decreased most likely due to the lack of adhesion between the two polymeric phases. Crown Copyright (C) 2012 Published by Elsevier Ltd. All rights reserved.|
|Editor:||Elsevier Science Bv|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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