Hyperbranched polyester polyol modified with polylactic acid as a compatibilizer for plasticized tapioca starch/polylactic acid blends

Mesías Álvarez, Ricardo Esteban; Murillo Ruiz, Edwin Alberto

Hyperbranched polyester polyol modified with polylactic acid as a compatibilizer for plasticized tapioca starch/polylactic acid blends

2018

Mesías Álvarez, Ricardo Esteban | Murillo Ruiz, Edwin Alberto

ABSTRACT: A hyperbranched polyester polyol of the second generation (HBP2) was modified with polylactic acid (HBP2-g-PLA) and employed as a compatibilizer for plasticized tapioca starch (TPS)/polylactic acid (PLA) blends. The effect of the compatibilizer HBP2-g-PLA was evaluated in comparison to the control sample (TPS/PLA blend without HBP2-g‑PLA). The torque value of the TPS/PLA blends with HBP2-g-PLA was lower than that of the control sample, while thermal stability and crystallinity followed opposite behavior. The glass transition temperature (Tg) and degree of crystallinity of the TPS/PLA blends with HBP2-g-PLA decreased with increasing mass fraction of HBP2-g-PLA. By scanning electron microscopy (SEM), it was observed that the morphology of the TPS/PLA blends with HBP2-g-PLA was more homogeneous than that of the control sample, confirming that HBP2-g-PLA acted as a compatibilizer and plasticizing agent to the TPS/PLA blends. Rheological analysis of the compatibilized TPS/PLA blends indicated the presence of microstructure.

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Palabras clave de AGROVOC

biopolymers biopolímeros poliésteres polyesters tapioca

Información bibliográfica

Editorial

Grupo de Materiales Poliméricos, São Carlos, Brasil

Idioma

Inglés

Formato

9, application/pdf, application/pdf

Licencia

info:eu-repo/semantics/openAccess, http://creativecommons.org/licenses/by/2.5/co/, http://purl.org/coar/access_right/c_abf2, https://creativecommons.org/licenses/by/4.0/

ISSN

1678-5169, 0104-1428

Tipo

Info:eu-Repo/semantics/article; Info:eu-Repo/semantics/publishedversion; Http://purl.org/coar/resource_type/c_2df8fbb1; Https://purl.org/redcol/resource_type/art; Artículo De Investigación

En AGRIS desde: 2024-10-18

Formato: Dublin Core

Proveedor de Datos

Este registro bibliográfico ha sido proporcionado por Universidad de Antioquía

Descubra la colección de este proveedor de datos en AGRIS

Enlaces

DOI https://hdl.handle.net/10495/33513

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