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PVA 0588 is a kind of typical water soluble crystalline polymer, with excellent mechanical properties and surface activity, and it is widely used in industry.
Especially PVA 05882s water solubility and excellent film-forming, are much better than other polymer.
The properties of PVA 0588 are closely related to its polymerization degree and alcoholysis degree, and the properties determine the nature of its application.
CAS: 9002-89-5
MF: C2H4O
MW: 44.05256
EINECS: 209-183-3
Synonyms
POLYVINYL ALCOHOL 2000;Polyvinyl alcohol, 86-89% hydrolyzed, medium molecular weight;Polyvinyl alcohol, 98-99% hydrolyzed, medium molecular weight;Polyvinyl alcohol, 98-99% hydrolyzed, high molecular weight;Poly(vinyl Alcohol) n=1750+/-50;Poly(vinyl Alcohol) n(=:)2,000 (degree's of saponification ca. 80mol%);POLYVINYL ALCOHOL 98-99% HYDROLYZED;POLYVINYL ALCOHOL 99% POWDER
Conventional varieties due to the existence of defects in the heat resistant PPVA 0588, water resistance, creep resistance and so on, affect the scope of its application.
In order to further improve the performance of PVA 0588, expand the scope of application of Polyvinyl Alcohol, differentiation of Polyvinyl Alcohol (with different degree of polymerization and alcoholysis ) technology research is very necessary.
PVA 0588 means the polymerization degree of this kind of PVA 0588 is 500 and the alcoholysis degree of it is 88%.
PVA 0588 belongs to a kind of low polymerization degree, partial alcoholysis type Polyvinyl Alcohol products, has excellent surface activity.
PVA 0588 can be used for PVAc, VAE emulsion, VAc emulsion polymerization of vinyl chloride suspension polymerization of emulsifier, dispersant.
And because of its low molecular weight, PVA 0588 were superior in moisture absorption, water soluble and flexibility in other models of file.
And PVA 0588 is widely used in traditional Chinese medicine, can be used as coating film material, filming agent film forming material, gel preparation of matrix materials and so on.
PVA 0588 by Liwei chemical (Sinochem) is a non-toxic polyvinyl alcohol (PVA) grade.
PVA 0588 is a non-ionic, linear and high polymer grade.
PVA 0588 is soluble in water while insoluble in organic solvent and organic acids.
Exhibits excellent film-forming property, good stability, oil- and chemical resistance.
PVA 0588 can react with formaldehydes to form polyvinyl acetal.
PVA 0588 is suitable for use with water-soluble polymers, plastics and rubber.
PVA 0588 is a homopolymer macromolecule obtained by polymerisation of vinyl alcohol.
PVA 0588 is used as a pharmaceutic aid and ophthalmic lubricant as well as in the manufacture of surface coatings artificial sponges, cosmetics, and other products.
PVA 0588 is a hydrophilic linear polymer which forms copolymers of vinyl alcohol and vinyl acetate.
Hence, the structural properties of polyvinyl alcohol polymers depend on the extent of polymerization and hydrolysis.
Such changes cause both chemical and physical modifications such as esterification, etherification, crystallization, ion-polymer complexation in the polymer.
Modified- PVOH structures are useful in biomedical applications.
PVA 0588 is a low-polymerization-degree, partially hydrolyzed polyvinyl alcohol characterized by a degree of polymerization (DP) ~500 and a hydrolysis degree of ~88 mole%.
PVA 0588 is synthesized through controlled hydrolysis of polyvinyl acetate.
PVA 0588 Chemical Properties
Melting point: >300 °C
Boiling point: -14.5°C (rough estimate)
Density: 1.080 g/cm3
Tg: 73
Tg: 99
Tg: 99°C
Bulk density: 400-670kg/m3
Refractive index: 1.3810 (estimate)
Fp: 79°C
Storage temp.: Store below +30°C.
Solubility H2O: soluble (hot)
Form: Powder
Color: White to cream
Odor: at 100.00?%. odorless
PH: 3.5-7.0 (40g/l, H2O, 20℃)
Water Solubility: soluble in hot water
Merck: 14,7585
Dielectric constant: 1.9（Ambient）
Stability: Stable. Combustible. Dust may form explosive mixtures with air. Incompatible with strong oxidizing agents.
NIST Chemistry Reference: Polyvinyl alcohol(9002-89-5)
IARC: 3 (Vol. 19, Sup 7) 1987
EPA Substance Registry System: PVA 0588 (9002-89-5)
PVA 0588 is a hydrolysis product of polyvinyl acetate, rather than by the polymerization of monomers; the molecular backbone contains Polyvinyl alcohol.
The specific gravity of PVA 0588 1.25 to 1.35 and the melting point is 212 ~ 267 ℃.
PVA 0588 is soluble in hot water and hot dimethyl sulfoxide.
Animal experiments show that polyvinyl alcohol, without stimulation, causes no significant toxicity upon subcutaneous, intramuscular, intravenous injection.
Polyvinyl alcohol resin products appear as white solid with the appearance of sub-floc, granular and powder; PVA 0588 is non-toxic, tasteless, non-polluting and is soluble in water of 80--90 ℃.
PVA 0588's aqueous solution has good adhesiveness and film-forming property; it can resist most organic solvents such as oils, lubricants and hydrocarbons; it has long-chain polyol esterification, etherification, acetalization and other chemical properties.
Uses
PVA 0588 is mainly used in the textile industry, as the raw materials of warp pulp, fabric finishing agent, vinylon fiber; interior and exterior wall paint of the building, adhesives; chemical industry use it as a polymerization emulsifier, dispersant and polyvinyl formal, acetal, butyrate aldehyde resin; paper industry use it as a paper binder; agriculture use it as soil improvers, pesticide adhesion synergist and polyvinyl alcohol film; PVA 0588 can also be used for daily cosmetics and high-frequency quenching agent and so on.
NaA zeolite particles have been dispersed in a poly(vinyl alcohol) matrix to prepare a mixed-matrix membrane to study the pervaporative separation of water-butanol mixtures.
PVA 0588/gelatin based biocompatible polymeric scaffolds have been used to design for 3D cancer models.
NaA zeolite particles have been dispersed in a PVA 0588 matrix to prepare a mixed-matrix membrane to study the pervaporative separation of water-butanol mixtures.
Poly (vinyl alcohol)/gelatin based biocompatible polymeric scaffolds have been used to design for 3D cancer models.
PVA 0588 can be used for a variety of applications such as drug delivery, surface enhanced Raman spectroscopy (SERS) fiber-optic sensors, and transparent conducting oxides (TCOs).
In the plastics industry in molding Compounds, surface coatings, films resistant to gasoline, textile sizes and finishing compositions; can be compounded to yield elastomers to be used in manufacture of artificial sponges, fuel hoses, etc., also in printing inks for plastics and glass, in pharmaceutical finishing, cosmetics, water-sol film and sheeting.
Pharmaceutic aid (viscosity increasing agent); ophthalmic lubricant.
Pharmaceutical Applications
PVA 0588 is used primarily in topical pharmaceutical and ophthalmic formulations.
PVA 0588 is used as a stabilizing agent for emulsions (0.25–3.0% w/v).
PVA 0588 is also used as a viscosity-increasing agent for viscous formulations such as ophthalmic products.
PVA 0588 is used in artificial tears and contact lens solutions for lubrication purposes, in sustained-release formulations for oral administration, and in transdermal patches.
PVA 0588 may be made into microspheres when mixed with a glutaraldehyde solution.
Industrial uses
PVA 0588 is a tough, whitish polymerthat can be formed into strong films, tubes, andfibers that are highly resistant to hydrocarbonsolvents.
Although PVA 0588 is one ofthe few water-soluble polymers, it can be renderedinsoluble in water by drawing or by theuse of cross-linking agents.
Production Methods
PVA 0588 is produced through the hydrolysis of polyvinyl acetate.
The repeating unit of vinyl alcohol is not used as the starting material because PVA 0588 cannot be obtained in the quantities and purity required for polymerization purposes.
The hydrolysis proceeds rapidly in methanol, ethanol, or a mixture of alcohol and methyl acetate, using alkalis or mineral acids as catalysts.
