pvac, Polyvinyl acetate, PVAC is a rubbery synthetic polymer with the formula (C4H6O2)n. PVAC belongs to the polyvinyl esters. pvac is largely used in food and industry application. PVAC will play an important role in today's industry
Polyvinyl acetate, PVA, PVAc, poly(ethenyl ethanoate), is a rubbery synthetic polymer with the formula (C4H6O2)n. It belongs to the polyvinyl esters family with the general formula -[RCOOCHCH2]-. It is a type of thermoplastic.
It should not be confused with the related polymer polyvinyl alcohol, which is called PVA also (PVAc could be considered a technically correct abbreviation for polyvinyl acetate and would aid in avoiding such confusion).
Polyvinyl Acetate is a component of a widely-used type of glue, referred to variously as wood glue, white glue, carpenter's glue, school glue or PVA glue. Addictives to glass fiber reinforced plastics for automobile light cover, and mixed with cement to form a stable concrete in floor decking.
Our polyvinyl acetate (PVAC) is homo polymerized, and turns out to be of Solid form in Slice, Granule and Powder, and is well dissolluted in unsaturated resin liquid. The three significant grades of our products are listed in the table beneath for your kind reference and study.
|ITEM||Apearance||Solid||Viscosity (mpas)||Molecular Weight (Da)||Residual Acid (mgKOH/g)||Viscosity of 40% Styrene Liquid (mpas)|
|YYPVAC2||Slice, Granule, Powder||100%||3.5--5.0||55,000-80,000||＜0.5||～800|
Among the three typical grades, a vast range of specific products are available against customizing. A general PDF-document is attached to show more properties of the PVAC solids.
1 Molecular Structure
The polyvinyl acetate, PVAC, is a rubbery synthetic polymer with the formula (C4H6O2)n. It belongs to the polyvinyl esters family with the general formula -[RCOOCHCH2]-. It is a type of thermoplastic. \
2 Chemical Properties
The degree of polymerization of polyvinyl acetate typically is 100 to 5000. The ester groups of the polyvinyl acetate are sensitive for alkali and will slowly convert PVAC into polyvinyl alcohol and acetic acid.
Under alkaline conditions, boron compounds, such as boric acid or borax causes the polymer to cross-link forming tackifying precipitates or slim
3 Chemical Parameters
Viscosity (10%, 20C): 1.0-4.0
Molecular: 100,000 to 300,000
Soften Point: 58-110 C.
Free Acid (CH3COOH): ≤ 0.05%.
Volatilizer: ≤ 1.0%.
Lead (Pb): ≤ 1.0mg/kg.
Arsenic(As): ≤ 3.0mg/kg.
Heavy metal: ≤ 10mg/kg
4. Physical Performance
Status: Solid, Apparent granule
Density: 1.19g/cubic cm (25℃)
Refractive Index: 1.467(20℃),
Vitrification temperature: 30-40 degree
Thermal Deformation: 50 degree
Pulling Stress: 34Mpa
Water Absording: 2%～5%
Solubility: Soluble in methanol, ketones, esters, aromatics, chlorinated hydrocarbons, insoluble in ethanol, higher alcohols, alkanes, cyclohexane, water, etc.
Stability: Stable in sunshine and under 125℃, darkens at 150℃, deforms at 225℃, release acetic acid and brown resinous insoluble matter.