Water vapor permeability and tensile properties of poly(l-lactic acid)/synthetic mica nanocomposites prepared by melt blending

Autor:	Victor Jayme Roget Rodriguez Pita, Marali Vilela Dias, Soraia Vilela Borges, Chiaki Azuma, Marcos L. Dias
Rok vydání:	2012
Předmět:	Poly l lactic acid Nanocomposite Materials science Polymers and Plastics food and beverages Melt blending Surfaces Coatings and Films stomatognathic diseases Ultimate tensile strength Materials Chemistry Water vapor permeability Extrusion Mica Composite material Mixing chamber
Zdroj:	Journal of Plastic Film & Sheeting. 29:112-126
ISSN:	1530-8014 8756-0879
Popis:	Poly(L-lactic acid)/synthetic mica (Somasif) nanocomposites were obtained by melt blending in a mixing chamber according to a factorial experimental design and considering the following variables: temperature, rotor speed, nanofiller concentration and residence time. Relatively high degree of dispersion was attained by the melt processing which generates poly(L-lactic acid)/synthetic mica nanocomposites with particle size even in the order of 40 nm. The tensile properties and the water vapor permeability of these nanocomposites were evaluated. The introduction of synthetic mica into neat poly(L-lactic acid) decreased the water vapor permeability by about 50%. The variables which most affected the tensile properties were the mixing time and clay concentration, but the levels studied or the degree of intercalation/exfoliation were insufficient to significantly improve the tensile properties of poly(L-lactic acid)/somasif mica nanocomposites.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::278146535b56ca0ac0739c6267d96b77 https://doi.org/10.1177/8756087912463712 Zobrazit plný text záznamu