Studies on the properties and biodegradability of PVA/Trapa natans starch (N-st) composite films and PVA/N-st-g-poly (EMA) composite films.
Int J Biol Macromol
; 123: 826-836, 2019 Feb 15.
Article
em En
| MEDLINE
| ID: mdl-30452995
ABSTRACT
The morphological modification of Trapa natans starch was done by grafting the methylmethacrylate (EMA) using ferrous ammonium sulphatepotassium persulphate as a redox initiator. Different reaction parameters such as reaction temperature, time, monomer concentration, pH and solvent were optimized to get maximum graft yield (56%). The graft copolymers thus formed were characterized by Fourier transform infrared, scanning electron microscopy, X-ray diffraction and TGA/DTA/DTG techniques. PVA/starch (N-st) composite films and PVA/N-Starch-grafted-poly (EMA) composite films were prepared separately by using glycerol as a plasticizer. The effect and content of grafted starch on the mechanical properties, water uptake (%), and biodegradability of the composite films were observed. Elongation at break % of PVA/starch-grafted-poly (EMA) (11) increased up to 38.9% of pure PVA/N-starch composites (11). With further increase in the ratio of grafted starch from (50% to 70%) Elongation at break, % increased to a great extent. There was 223.14% increased in PVA/starch-grafted-poly (EMA) (37) as compared to pure PVA/N-starch (37) composite films. The Max stress increased up to 100% in PVA/N-starch-grafted-poly (EMA) (37) composite film of pure PVA/N-starch composite films (37). There were 41.63% decreases in water uptake in PVA/N-starch-grafted-poly (EMA) (37) composite films as compared to PVA/N-starch composite films.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Álcool de Polivinil
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Amido
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Materiais Biocompatíveis
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Fagopyrum
Idioma:
En
Revista:
Int J Biol Macromol
Ano de publicação:
2019
Tipo de documento:
Article