Preparation and characterization of maleic anhydride grafted poly (hydroxybutirate-co-hydroxyvalerate) - phbv-g-ma

Date
2016Author
do Amaral Montanheiro, Thais Larissa [UNIFESP]
Passador, Fabio Roberto [UNIFESP]
de Oliveira, Mauricio Pinheiro [UNIFESP]
Duran, Nelson
Lemes, Ana Paula [UNIFESP]
Type
ArtigoISSN
1516-1439Is part of
Materials Research-Ibero-American Journal Of MaterialsDOI
10.1590/1980-5373-MR-2015-0496Metadata
Show full item recordAbstract
A compatibilizer agent was successfully produced by grafting maleic anhydride (MA) to poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV) chains on a reactive processing by mechanical mixing, using a mixture of PHBV, MA and dicumyl peroxide (DCP) as initiator. The resulting PHBV grafted MA. (PHBV-g-MA) was characterized by Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and gel permeation chromatography (GPC), and its properties were compared to neat PHBV. FTIR showed an absorption band at 699 cm(-1) for PHBV-g-MA, related to CH group of grafted anhydride ring. The initial thermal degradation temperature of the compatibilizer agent was reduced when compared to neat PHBV. DSC analysis showed that after grafting MA onto PHBV the crystallization temperature was about 20 degrees C higher than neat PHBV, and the degree of crystallinity was increased. GPC analysis showed that MA when grafted onto PHBV led to a reduction of molecular weight and polydispersity.
Citation
Materials Research-Ibero-American Journal Of Materials. Sao carlos, v. 19, n. 1, p. 229-235, 2016.Keywords
Poly(Hydroxybutyrate-Co-Hydroxyvalerate)Maleic Anhydride
Graf Copolymer
Compatibilizer
BiopolymerMaleated Poly(3-Hydroxybutyrate)
Ftir Spectroscopy
Carbon Nanotube
Nanocomposites
Polypropylene
Crystallization
Composites
Functionalization
Polyethylene
Morphology
Sponsorship
Brazilian Funding institution CAPESBrazilian Funding institution FAPESP
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