Thermal properties of pure and doped (polyvinyl-alcohol) PVA

1994 ◽  
Vol 42 (6) ◽  
pp. 1113-1122 ◽  
Author(s):  
M. I. Abdel-Ati ◽  
O. M. Hemeda ◽  
M. M. Mosaad ◽  
D. M. Hemeda
Keyword(s):  
Thermal Properties ◽  
Polyvinyl Alcohol

Mechanical and thermal properties of a nanocomposite material which epoxy based and reinforced with polyvinyl alcohol nano fibers contained multiwalled carbon nanotube

2020 ◽  
pp. 002199832096979
Author(s):  
Fatih Yıldırım ◽  
Necati Ataberk ◽  
Mürsel Ekrem
Keyword(s):  
Thermal Properties ◽  
Polyvinyl Alcohol ◽  
Tensile Tests ◽  
Nanocomposite Materials ◽  
Uniaxial Tensile ◽  
Mechanical And Thermal Properties ◽  
Multiwalled Carbon ◽  
Number Of Layers ◽  
Electrospinning Method ◽  
Carbon Nano Tube

In this study, the thermal and mechanical properties of nanocomposite materials were investigated. Produced nanocomposite materials are epoxy-based and reinforced with Multiwalled Carbon Nano Tube dopped polyvinyl alcohol (PVA) nanofibers. Nanofibers were produced by the electrospinning method. Nanofibers were used for reinforcement as 5, 10, and 15 number of layers. These nanocomposite materials were subjected to uniaxial tensile tests at constant tensile speed in accordance with ASTM D882-02 standards. Tensile strength, elasticity modulus, Poisson's ratio, and toughness values were obtained and these values were compared with the values of reference pure epoxy samples without the nanofiber. For obtaining the thermal properties of the samples Thermogravimetric and Differential Thermal Analysis were performed. In order to investigate the damage mechanisms, the fractured tensile test specimens' surfaces were visualized by Scanning Electron Microscopy. Mechanical and thermal properties of the epoxy were improved by using the PVA nanofibers dopped the MWCNT.

Hydroxylated boron nitride nanotube‐reinforced polyvinyl alcohol nanocomposite films with simultaneous improvement of mechanical and thermal properties

2020 ◽  
Vol 41 (12) ◽  
pp. 5182-5194
Author(s):  
Xiaolong Lu ◽  
Pranjal Nautiyal ◽  
Jenniffer Bustillos ◽  
Archana Loganathan ◽  
Cheng Zhang ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Boron Nitride ◽  
Polyvinyl Alcohol ◽  
Nanocomposite Films ◽  
Mechanical And Thermal Properties ◽  
Boron Nitride Nanotube

Effect of Gelatinization on Morphology and Thermal Properties of Polyvinyl Alcohol-Corn Starch Blend Films

2012 ◽  
Vol 724 ◽  
pp. 89-92
Author(s):  
Ji Wei Li ◽  
Xue Gang Luo ◽  
Xiao Yan Lin ◽  
Xian Hong Li
Keyword(s):  
Weight Loss ◽  
Thermal Properties ◽  
Polyvinyl Alcohol ◽  
Corn Starch ◽  
Casting Method ◽  
Scanning Calorimetry ◽  
Blend Films ◽  
Hydrogen Bonding Interactions ◽  
Gelatinized Starch ◽  
Solution Casting Method

The blend films of ungelatinized and gelatinized starch/polyvinyl alcohol (PVA) were prepared by solution casting method. Their morphologies and thermal properties were analyzed by scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). A droplet phase was observed in the blends containing ungelatinized starch and a laminated phase was observed in the blends containing gelatinized starch. For both ungelatinized and gelatinized starch/PVA blends the melting temperature (Tm) (210230) of PVA was detected, and the Tm of gelatinized starch/PVA blends was higher than that of the ungelatinized starch/PVA blends. TGA results showed that over the rst 300 the weight loss for ungelatinized starch/PVA blends was higher than that for gelatinized starch/PVA blends, however the gelatinized starch/PVA blends showed the greater weight loss after scanning up to 400. Different morphologies and thermal properties of two types of blends were attributed to the different hydrogen bonding interactions between starch and polyvinyl alcohol.

Biodegradable polyvinyl alcohol nanocomposites made from rice straw fibrils: Mechanical and thermal properties

2012 ◽  
Vol 47 (12) ◽  
pp. 1449-1459 ◽  
Author(s):  
Yan Wu ◽  
Siqun Wang ◽  
Dingguo Zhou ◽  
Yang Zhang ◽  
Xin Wang ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Polyvinyl Alcohol ◽  
Rice Straw ◽  
Mechanical And Thermal Properties
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