The effect of molecular weight and hydrolysis degree of poly(vinyl alcohol)(PVA) on the thermal and mechanical properties of poly(lactic acid)/PVA blends
Author
dc.contributor.author
Restrepo, Iván
Author
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Medina, Carlos
Author
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Meruane Naranjo, Viviana
Author
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Akbari Fakhrabadi, A.
Author
dc.contributor.author
Flores, Paulo
Author
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Rodríguez Llamazares, Saddys María
Admission date
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2018-11-09T14:46:41Z
Available date
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2018-11-09T14:46:41Z
Publication date
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2018-06
Cita de ítem
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Polímeros-Ciencia e Tecnología Volumen: 28 Número: 2 Páginas: 169-177
es_ES
Identifier
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10.1590/0104-1428.03117
Identifier
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https://repositorio.uchile.cl/handle/2250/152554
Abstract
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The effect of molecular weights and hydrolysis degrees (HD) of polyvinyl alcohol (PVA) on thermal and mechanical properties and crystallinity of polylactic acid (PLA)/PVA blends was investigated. Blends were prepared by the melt blending method using PLA/PVA ratios: 80/20, 90/10 and 97/3 wt. %. A single glass transition temperatures was observed for all PLA/PVA blends, suggesting the formation of binary compatible blends at concentration range studied. Thermogravimetric analysis results showed a better thermal stability for PLA/PVA blends containing PVA of higher Mw and HD. According to mechanical properties, low quantities of PVA (3 wt. %) do not affect the tensile strength of blends (irrespective of Mw and HD). However, as the PVA content increases, tensile strength tends to lower values, especially for blends with 20 wt.% of PVA, with 98% of HD.
es_ES
Patrocinador
dc.description.sponsorship
Comision Nacional de Investigacion Cientifica y Tecnologica CONICYT (Beca de Doctorado Nacional - Proyecto)
PAI 781411004
CONICYT-REGIONAL
R08C1002
Programa de Financiamiento Basal para Centros Cientificos y Tecnologicos de Excelencia
PFB-27
The effect of molecular weight and hydrolysis degree of poly(vinyl alcohol)(PVA) on the thermal and mechanical properties of poly(lactic acid)/PVA blends