{"id":751,"date":"2021-11-30T15:45:13","date_gmt":"2021-11-30T06:45:13","guid":{"rendered":"https:\/\/www.j-vp.co.jp\/english\/?page_id=751"},"modified":"2022-03-18T23:00:19","modified_gmt":"2022-03-18T14:00:19","slug":"properties","status":"publish","type":"page","link":"https:\/\/www.j-vp.co.jp\/english\/pva\/properties","title":{"rendered":"Basic Properties"},"content":{"rendered":"\n

POVAL Characteristics<\/h2>\n\n\n\n
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Water solubility<\/h4>\n\n\n\n

POVAL is a water-soluble polymer and can be dissolved in water at the desired ratio.POVAL aqueous solutions have a suitable viscosity and can be coated on a variety of objects to form a surface membrane when dried.<\/p>\n<\/div><\/div>\n<\/div>\n\n\n\n

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Solvent Resistance<\/h4>\n\n\n\n

POVAL will only dissolve in certain solvents, such as DMSO (dimethylsulfoxide), and water. It will not dissolve and remains stable in the presence of organic solvents, animal and plant oils, and grease.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n\n\n

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Adhesive Strength<\/h4>\n\n\n\n

POVAL has hydroxyl groups, so it exhibits a powerful adhesive force to hydrophilic surfaces, such as paper or wood.<\/p>\n<\/div><\/div>\n<\/div>\n\n\n\n

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Chemical Reactivity<\/h4>\n\n\n\n

POVAL has hydroxyl groups, so it can be reformed through acetalization reactions and reactions with boric acid and borax among others.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n\n\n

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Membrane Formation<\/h4>\n\n\n\n

POVAL has excellent membrane formation, high film transparency, high strength, excellent gas barrier, clouding prevention, and anti-static electricity.<\/p>\n<\/div><\/div>\n<\/div>\n\n\n\n

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Surface Activation<\/h4>\n\n\n\n

POVAL has hydrophilic hydroxyl groups and hydrophobic acetate groups, so it exhibits excellent surface activation, emulsion, and dispersion properties.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n\n\n

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Stability<\/h4>\n\n\n\n

POVAL is a stable polymer that will not change or deteriorate in general environments<\/p>\n<\/div><\/div>\n<\/div>\n\n\n\n

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Effects of the Degree of Polymerization and Degree of Hydrolysis<\/h2>\n\n\n\n

POVAL’s characteristics are affected by the degree of polymerization and the degree of hydrolysis.
The following table shows the affect of the degree of polymerization and degree of hydrolysis on POVAL\u2019s basic characteristics.<\/p>\n\n\n\n

\n\n\n\n\n\n\n\n\n\n\n\n
Characteristic<\/td>\nDegree of Polymerization<\/td>\n\u00a0Degree of Hydrolysis<\/td>\n<\/tr>\n
Low<\/td>\nHigh<\/td>\nLow<\/td>\nHigh<\/td>\n<\/tr>\n
Low Degree of
Polymerization Products<\/td>\n		High Degree of
Polymerization Products<\/td>\n		Partially Hydrolyzed Type<\/td>\nFully Hydrolyzed Type<\/td>\n<\/tr>\n
Viscosity of solution<\/td>\n\"\"<\/td>\n\"\"<\/td>\n\"\"<\/td>\n\"\"<\/td>\n<\/tr>\n
Viscosity stability
at low temperature<\/td>\n		\"\"<\/td>\n\"\"<\/td>\n\"\"<\/td>\n\"\"<\/td>\n<\/tr>\n
Membrane strength<\/td>\n\"\"<\/td>\n\"\"<\/td>\n\"\"<\/td>\n\"\"<\/td>\n<\/tr>\n
Water solubility<\/td>\n\"\"<\/td>\n\"\"<\/td>\n\"\"<\/td>\n\"\"<\/td>\n<\/tr>\n
Water resistance<\/td>\n\"\"<\/td>\n\"\"<\/td>\n\"\"<\/td>\n\"\"<\/td>\n<\/tr>\n
Emulsifying ability<\/td>\n\"\"<\/td>\n\"\"<\/td>\n\"\"<\/td>\n\"\"<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div><\/div>\n\n\n\n

The greater the number of arrows shown, the greater the affect.<\/p>\n\n\n\n

Viscosity of Solution<\/h2>\n\n\n\n

Relationship Between Aqueous Solution Concentration,Temperature, and Viscosity (Type B Viscometer)<\/h3>\n\n\n\n
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Fully Hydrolyzed Type<\/h4>\n\n\n\n
\"\"<\/figure>\n\n\n\n