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Preparation and characterization of acetylated maltodextrin and its blend with poly(butylene adipate-co-terephthalate)

Acetylated maltodextrins (AMDs) were synthesized. It was found that maltodextrin (MD) was easily acetylated to form AMDs with high degree of substitution (DS). The DS of the prepared AMDs was much higher than that of acetylated corn starches (ACSs) obtained under the same reaction conditions. The di... Full description

Contained in: Carbohydrate Polymers Vol. 181 (2018), p. 701-709
Journal Title: Carbohydrate Polymers
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Links: Additional Link (dx.doi.org)
Additional Keywords: BIOLOGISCH-ABBAUBARES-POLYMER
ELEKTRONENMIKROSKOPIE
GLASUEBERGANG
GRENZFLAECHENADHAESION
HETEROGENE-KEIMAUSBILDUNG
KALORIMETRIE
POLYMERMISCHUNG
REAKTIONSBEDINGUNG
STOFFGEMISCH
STRECKGRENZE
SUBSTITUTIONSGRAD
DOI: 10.1016/j.carbpol.2017.11.092
Notes: Copyright: Metadaten: TEMA, Copyright WTI-Frankfurt eG
Copyright: (C) Alle Rechte beim Herausgeber
Physical Description: 9 Seiten, 40 Quellen
ID (e.g. DOI, URN): 10.1016/j.carbpol.2017.11.092
PPN (Catalogue-ID): WTI057726361
Note: WTI TEMA DB
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520 |a Acetylated maltodextrins (AMDs) were synthesized. It was found that maltodextrin (MD) was easily acetylated to form AMDs with high degree of substitution (DS). The DS of the prepared AMDs was much higher than that of acetylated corn starches (ACSs) obtained under the same reaction conditions. The differential scanning calorimetry (DSC) measurements clearly highlighted that AMD underwent a glass transition at about 109 °C. Moreover, AMD possessed higher thermal stability than MD. The AMD with DS 2.13 (AMD2.13) was melt-blended with poly(butylene adipate-co-terephthalate) (PBAT) to fabricate novel PBAT/AMD polymer blends. Rheological measurements indicated that AMD2.13 had a plasticizing effect on PBAT. Moreover, scanning electron microscopy (SEM) measurements indicated good interfacial adhesion between PBAT and AMD2.13. The onset temperature of non-isothermal melt crystallization of PBAT increased from 81.95 to 92.19 °C due to the favorable heterogeneous nucleation effect. Mechanical tests showed that the yield strength of the PBAT/AMD blends was enhanced. 
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