A Study of Dynamic Mechanical and Thermal Behavior of Starch/Poly(vinylalcohol) Based Films

Ray, Dipa; Roy, Papri; Sengupta, Surajit; Sengupta, Siba Prasad; Mohanty, Amar K.; Misra, Manjusri

doi:10.1007/s10924-009-0116-0

Cited by 25 publications

(17 citation statements)

References 13 publications

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“…Thermal degradation occurred between 150 and 450°C, which is the same range observed with corn starch + PVA (average degree of hydrolysis) films plasticized with glycerol and urea …”

Section: Resultssupporting

confidence: 68%

Mixture design applied for the development of films based on starch, polyvinyl alcohol, and glycerol

Zanela

Olivato

Dias

et al. 2015

J of Applied Polymer Sci

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Starch and polyvinyl alcohol (PVA) are biodegradable materials with potentiality to replace the conventional polymers in some applications. The aim of this work was to produce biodegradable films of PVA, cassava starch, and glycerol by thermoplastic extrusion using a mixture design to evaluate the effects of each component in the blend properties. Six formulations were prepared using a twin-screw extruder coupled with a calender. All the materials were visually homogeneous and presented good processability. Mechanical properties were dependent on both the relative humidity conditioning and the formulation; higher relative humidities detracted the mechanical properties, which was associated to plasticizer effect of the water. Furthermore, the mechanical properties were better when higher concentrations of PVA were used, resulting in films with lower opacity, lower water vapor permeability, and higher thermal stability, according to TGA. Biodegradable materials based on starch, PVA, and glycerol have adequate mechanical and processing properties for commercial production.

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“…Thermal degradation occurred between 150 and 450°C, which is the same range observed with corn starch + PVA (average degree of hydrolysis) films plasticized with glycerol and urea …”

Section: Resultssupporting

confidence: 68%

Mixture design applied for the development of films based on starch, polyvinyl alcohol, and glycerol

Zanela

Olivato

Dias

et al. 2015

J of Applied Polymer Sci

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“…Another study was made by Ray et al [66]; they prepared starch/ polyvinyl alcohol blends (glycerol was used as a plasticizer). The blends were character ized with dynamic mechanical analysis and TGA.…”

Section: Tps/polyvinyl Alcohol Blendsmentioning

confidence: 99%

Thermoplastic starch blends: A review of recent works

2012

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The aim of this review is to discuss the recent developments in thermoplastic starch blends. Starch has been considered as an excellent candidate to partially substitute synthetic polymer in packaging, agricul tural mulch and other low cost applications. Recently, the starch granules were plasticized using different plasticizers under heating and shearing, giving rise to a continues phase in the form of a viscous melt which can be processed using traditional plastic processing techniques, such as injection molding and extrusion. This kind of starch composites is called thermoplastic starch. Unfortunately, thermoplastic starch presents some drawbacks, such as low degradation temperatures, which make it difficult to process, poor mechanical properties and high water susceptibility. Much work has been carried out to overcome these drawbacks, including the combination of thermoplastic starch with other polymers, aiming at lowering the cost and enhancing the biodegradability of the final product.

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“…The thermal stability of the polymer blend depends on the inherent characteristics of the samples as well as on the molecular interactions between different macromolecules . The degradation of PVA follows a two‐step mechanism and is initiated by the dehydration of the hydroxyl groups .…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, both starch and PVA are biodegradable and the starch/PVA blend is the completely biodegradable material. Thus, the development and application of starch/PVA blend plastics is significantly important and meaningful .…”

Section: Introductionmentioning

confidence: 99%

The Effect of glycerol on the crystalline, thermal, and tensile properties of CaCl₂‐doped starch/PVA films

et al. 2015

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Starch/poly(vinyl alcohol) (PVA) films with the addition of 10 wt% CaCl2 and various content of glycerol were prepared. The effect of glycerol on the crystalline, thermal, and tensile properties of CaCl2‐doped starch/PVA films was studied by X‐ray diffraction, thermogravimetric analysis (TGA), and tensile testing, respectively. The effect of glycerol on the miscibility of CaCl2‐doped starch/PVA films was studied by scanning electron microscopy. The CaCl2‐doped starch/PVA film became more homogeneous after the addition of glycerol. The addition of glycerol would increase the crystallinity of CaCl2‐doped starch/PVA film. With the addition of 10 wt% glycerol and 10 wt% CaCl2, the starch/PVA film showed the highest degree of crystallinity. The TGA results show that the thermal stability of CaCl2‐doped starch/PVA film increased after the addition of glycerol. The toughness of CaCl2‐doped starch/PVA films was enhanced with the addition of glycerol. The starch/PVA film with the addition of 10 wt% CaCl2 and 20 wt% glycerol showed the tensile strength of 17 MPa and the elongation at break of 428%. Moreover, the water sorption of CaCl2‐doped starch/PVA film decreased after the addition of glycerol at the low and intermediate relative humidity of 33 and 54%. POLYM. COMPOS., 37:3191–3199, 2016. © 2015 Society of Plastics Engineers

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A Study of Dynamic Mechanical and Thermal Behavior of Starch/Poly(vinylalcohol) Based Films

Cited by 25 publications

References 13 publications

Mixture design applied for the development of films based on starch, polyvinyl alcohol, and glycerol

Mixture design applied for the development of films based on starch, polyvinyl alcohol, and glycerol

Thermoplastic starch blends: A review of recent works

The Effect of glycerol on the crystalline, thermal, and tensile properties of CaCl₂‐doped starch/PVA films

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A Study of Dynamic Mechanical and Thermal Behavior of Starch/Poly(vinylalcohol) Based Films

Cited by 25 publications

References 13 publications

Mixture design applied for the development of films based on starch, polyvinyl alcohol, and glycerol

Mixture design applied for the development of films based on starch, polyvinyl alcohol, and glycerol

Thermoplastic starch blends: A review of recent works

The Effect of glycerol on the crystalline, thermal, and tensile properties of CaCl2‐doped starch/PVA films

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The Effect of glycerol on the crystalline, thermal, and tensile properties of CaCl₂‐doped starch/PVA films