Preparation and thermally induced adhesion properties of a poly(vinyl alcohol)-g-N-isopropylacrylamide copolymer membrane

2012 ◽  
Vol 72 (7) ◽  
pp. 438-445 ◽  
Author(s):  
Jing Yang ◽  
Dao-Dao Hu ◽  
Hui Zhang
Keyword(s):  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Adhesion Properties ◽  
Thermally Induced

Reaction mechanism of thermally-induced electric conduction of poly(vinyl alcohol)–silver nitrate hybrid films

RSC Advances ◽  
2016 ◽  
Vol 6 (61) ◽  
pp. 56728-56737 ◽  
Author(s):  
Yong Gan ◽  
Shibing Bai ◽  
Shouliang Hu ◽  
Xiang Zhao ◽  
Yuefang Li
Keyword(s):  
Reaction Mechanism ◽  
Silver Nitrate ◽  
Metal Nanoparticles ◽  
Vinyl Alcohol ◽  
Hybrid Composites ◽  
Functional Materials ◽  
Poly Vinyl Alcohol ◽  
Electric Conduction ◽  
Hybrid Films ◽  
Thermally Induced

The combination of metal nanoparticles and polymers endows their hybrid composites with a number of unique features and opens a new way to fabricate novel functional materials.

MODIFICATION OF SKIM RUBBER BLENDED WITH POLY (VINYL ALCOHOL) TO BE APPLIED AS A BIODEGRADABLE PRESSURE-SENSITIVE ADHESIVE: EFFECT OF 2,6-DI-T-BUTYL-4-METHYLPHENOL AND HYDROCARBON RESIN

2012 ◽  
Vol 85 (4) ◽  
pp. 547-558 ◽  
Author(s):  
Sa-Ad Riyajan ◽  
Nataphon Pheweaw
Keyword(s):  
Vinyl Alcohol ◽  
Chain Scission ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Poly Vinyl Alcohol ◽  
Pressure Sensitive Adhesive ◽  
Scanning Calorimetry ◽  
Adhesion Properties ◽  
Pressure Sensitive ◽  
Adhesive Effect

ABSTRACT Pressure-sensitive adhesives (PSAs), or self-adhesives, are used in many applications, including safety labels for power equipment, automotive interior trim assembly, and sound/vibration–damping films. The objective of this study was to develop a biodegradable skim rubber–based bioadhesive blended with poly (vinyl alcohol) (PVA), which has the advantage of being biodegradable and biocompatible to humans. PSAs were produced from saponified low-protein skim rubber (S-LPSR) alone using a hydrocarbon resin as a tackifier and blends of S-LPSR/PVA containing tackifier, via solution and emulsion, respectively. The influence of 2,6-di-t-butyl-4-methylphenol (BHT) and the hydrocarbon resin content in the adhesive formulation was studied. Various methods were used to evaluate the properties of the adhesives produced including scanning electron microscopy, differential scanning calorimetry, contact angle measurement, dynamic mechanical thermal analysis, and Fourier transform infrared spectroscopy. The optimal concentration of PVA for a good PSA was found to be 20 phr because of its emulsion form. The adhesion properties of a PSA containing 50–60 phr of hydrocarbon resin and 1% BHT displayed excellent tack and peel compared with other samples because there was no chain scission of the skim rubber and good compatibility and interaction between the S-LPSR/PVA blend and the hydrocarbon resin, which maximized the adhesion properties of the adhesive.

scholarly journals The Effect of Glycerin Content in Sodium Alginate/Poly(vinyl alcohol)-Based Hydrogels for Wound Dressing Application

2021 ◽  
Vol 22 (21) ◽  
pp. 12022
Author(s):  
Katarzyna Bialik-Wąs ◽  
Klaudia Pluta ◽  
Dagmara Malina ◽  
Mateusz Barczewski ◽  
Katarzyna Malarz ◽  
...  
Keyword(s):  
Sodium Alginate ◽  
Vinyl Alcohol ◽  
Phosphate Buffer Solution ◽  
Dermal Fibroblasts ◽  
Poly Vinyl Alcohol ◽  
Buffer Solution ◽  
Adhesion Properties ◽  
Gel Fraction ◽  
Glycerin Content ◽  
The Impact

The impact of different amounts of glycerin, which was used in the system of sodium alginate/poly(vinyl alcohol) (SA/PVA) hydrogel materials on the properties, such as gel fraction, swelling ability, degradation in simulated body fluids, morphological analysis, and elongation tests were presented. The study shows a significant decrease in the gel fraction from 80.5 ± 2.1% to 45.0 ± 1.2% with the increase of glycerin content. The T5 values of the tested hydrogels were varied and range from 88.7 °C to 161.5 °C. The presence of glycerin in the matrices significantly decreased the thermal resistance, which was especially visible by T10 changes (273.9 to 163.5 °C). The degradation tests indicate that most of the tested materials do not degrade throughout the incubation period and maintain a constant ion level after 7-day incubation. The swelling abilities in distilled water and phosphate buffer solution are approximately 200–300%. However, we noticed that these values decrease with the increase in glycerin content. All tested matrices are characterized by the maximum elongation rate at break in a range of 37.6–69.5%. The FT-IR analysis exhibits glycerin changes in hydrogel structures, which is associated with the cross-linking reaction. Additionally, cytotoxicity results indicate good adhesion properties and no toxicity towards normal human dermal fibroblasts.

High modulus poly (vinyl alcohol) fibers by zone drawing

1986 ◽  
Vol 1 (6) ◽  
pp. 861-869 ◽  
Author(s):  
Paul D. Garrett ◽  
David T. Grubb
Keyword(s):  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
High Modulus

BIODEGRADATION BEHAVIOR OF POLY(VINYL ALCOHOL) - WOOD COMPOSITES

2019 ◽  
Vol 18 (1) ◽  
pp. 125-136 ◽  
Author(s):  
Luiza Jecu ◽  
Iuliana Raut ◽  
Elena Grosu ◽  
Mariana Calin ◽  
Violeta Purcar ◽  
...  
Keyword(s):  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Wood Composites
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