scholarly journals Fabrication of Novel Functional Cell‐Plastic Using Polyvinyl Alcohol: Effects of Cross‐Linking Structure and Mixing Ratio of Components on the Mechanical and Thermal Properties

2021 ◽  
pp. 2100026
Author(s):  
Kohei Iritani ◽  
Akihito Nakanishi ◽  
Ayami Ota ◽  
Takashi Yamashita
Keyword(s):  
Thermal Properties ◽  
Polyvinyl Alcohol ◽  
Cross Linking ◽  
Mechanical And Thermal Properties ◽  
Mixing Ratio ◽  
Alcohol Effects ◽  
Ratio Of Components

Dynamic and creep analysis of polyvinyl alcohol based films blended with starch and protein

2018 ◽  
Vol 39 (1) ◽  
pp. 35-47 ◽  
Author(s):  
Naman Jain ◽  
Vinay K. Singh ◽  
Sakshi Chauhan
Keyword(s):  
Polyvinyl Alcohol ◽  
Moisture Absorption ◽  
Viscoelastic Behavior ◽  
Mechanical Analysis ◽  
Cross Linking ◽  
Mechanical And Thermal Properties ◽  
Blend Films ◽  
Creep And Recovery ◽  
Degradation Temperature ◽  
Creep Analysis

Abstract The present study focuses on the fabrication and analyses of polyvinyl alcohol (PVA) based films blended with polymers, such as starch and protein. The aim is to improve the moisture absorption, solubility, mechanical and thermal properties of PVA by blending it with various polymers. The thermal cross-linking of the films has been studied by heating the films at 120°C for 4 h. The result shows that PVA was completely soluble in water, while post-blending solubility and moisture absorption of blended films decreased. The tensile strength of blended films was significantly higher (4%–29%) as compared to neat PVA, while thermally cross-linked films showed much higher strength (8%–174%). Blended films were characterized using Fourier transform infrared spectroscopy (FTIR) to confirm the formation of hydrogen bonds. Thermogravimetric analysis showed the increase in degradation temperature post-blending as compared to neat PVA. The viscoelastic behavior of the material as well as glass transition temperature was studied using dynamic mechanical analysis. Creep and recovery behavior were examined to study the effect of stress and temperature on creep strain. The biodegradability of the blended films was increased post-blending. This study showed that PVA based blend films can replace non-biodegradable plastics and hence are necessary for the development of environmentally friendly materials.

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

Clay modification with silane compounds and characterization of the silicone rubber/clay composites

2012 ◽  
Vol 32 (8-9) ◽  
pp. 493-502 ◽  
Author(s):  
Kyeong Hoon Jang ◽  
Eung-Soo Kim ◽  
Young Ho Jeon ◽  
Jin-San Yoon
Keyword(s):  
Thermal Stability ◽  
Thermal Properties ◽  
Silicone Rubber ◽  
Cross Linking ◽  
Mechanical And Thermal Properties ◽  
Curing Agent ◽  
Thiol Groups ◽  
Rubber Composites ◽  
Clay Modification

Abstract Na+ montmorillonite (MMT) was modified with benzyldimethyltetradecylammonium chloride (B13) and further with (3-mercaptopropyl)triethoxysilane and vinyltrimethoxysilane to prepare B13-MMT, mercaptomethylorthosilicate modified MMT (MTMO), and vinyltrimethoxysilane modified MMT (VTMO), respectively. The pristine and modified clays were compounded with an HTV-type silicone rubber (GP-30®), and the physical properties and morphology of the resulting rubber composites were examined. Both HTV/MTMO and HTV/VTMO exhibited an intercalated/exfoliated coexisting morphology, but the degree of exfoliation of the former composite was higher than that of the latter. Moreover, the thermal stability, as assessed by the onset temperature of thermal degradation, as well as the tensile stress, elongation at the break, and tear strength of HTV/MTMO was higher than those of HTV/B13-MMT and HTV/VTMO. However, the cross-linking density of HTV/MTMO was the lowest among the composites examined because the thiol groups of MTMO extinguished and abstracted the radicals formed by the curing agent. Accordingly, the improved mechanical and thermal properties of HTV/MTMO were attributed to the enhanced interactions between HTV and MTMO due to the chemical reaction between the thiol groups of MTMO and the vinyl groups of HTV.

Controllable Cross-Linking Anion Exchange Membranes with Excellent Mechanical and Thermal Properties

2018 ◽  
Vol 303 (3) ◽  
pp. 1700462 ◽  
Author(s):  
Chao Wang ◽  
Zhenfeng He ◽  
Xiaofeng Xie ◽  
Xianmin Mai ◽  
Yingchun Li ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Anion Exchange ◽  
Cross Linking ◽  
Mechanical And Thermal Properties ◽  
Anion Exchange Membranes

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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