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By
Engineer Nathan.J.Chifamba
B-tech Hons Chemical and Process Systems Engineering (Harare Institute of Technology ,Zimbabwe)
M-Tech Polymer Science and Technology
(Amity University Gurgaon India)
Polymer Technology Presentation
(Dr Nidhi Goel lecturer)
22/12/2016
Polyvinyl Acetate
Brief History
• Poly(vinyl acetate) was discovered in Germany in 1912 by Fritz
Klatte.
• The monomer, vinyl acetate, was first produced on an industrial scale
by addition of acetic acid to acetylene with a mercury(I) salt but it is
now primarily made by palladium catalyzed oxidative addition of
acetic acid to ethylene.
• Polyvinyl acetate is prepared by polymerization of vinyl acetate
monomer (free radical vinyl polymerization of the monomer vinyl
acetate).
INTRODUCTION
• it is a colorless, nontoxic thermoplastic resin prepared by the
polymerization of vinyl acetate. Polyvinyl acetate (PVAC) It is one of
the most widely used water-dispersed resins.
• Polyvinyl acetate water-based emulsions have been used as latex
house paints, artists' media (since 1945), and common household
white glues..
• Poly(vinyl acetate) (PVA, PVAc, poly(ethenyl ethanoate)
• It is commonly referred to as wood glue, white glue, carpenter's glue,
school glue, Elmer's glue in the US, or PVA glue)
• It is an aliphatic rubbery synthetic polymer with the formula (C4H6O2)n.
It belongs to the polyvinyl esters family with the general formula -
[RCOOCHCH2]-.
PROPERTIES
Under alkaline conditions, boron compounds such as boric acid or borax cause the polymer to cross-link.
A number of microorganisms can degrade polyvinyl acetate(fungi and algae).
Sets by the removal of water due to evaporation or absorption into a substrate.
 Have good weather resistance
Withstand water, grease, oil, and petroleum fuels degradation.
good biodegradation resistance
poor resistance to creep under load.
Softens at 30-45C
Soluble in benzene, chloroform, methanol, acetone, butyl acetate
Insoluble in ligroin, diethyl ether, butanol, turpentine, water, oils
Can absorb 3-5% water when immersed for 16 hours at 60 C.
Burns with a dark yellow flame that smells of acetic acid.
Combustible.
Uses
• PVA water-based emulsions have been used as latex house paints.
• Making commonly used household white glues.
• Making wood glue.
• Makin paper glue.
• Adhesives.
• Glues for porous material.
• Used as a primer for drywall and other substrates.
• As a mortar additive.
7
Mechanism (free radical Polymerization)
Free Radical Mechanism
Mechanism Continued
9
Any Questions!!!!
Polyvinylacetate

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一比一原版(CalArts毕业证)加利福尼亚艺术学院毕业证如何办理
 

Polyvinylacetate

  • 1. By Engineer Nathan.J.Chifamba B-tech Hons Chemical and Process Systems Engineering (Harare Institute of Technology ,Zimbabwe) M-Tech Polymer Science and Technology (Amity University Gurgaon India) Polymer Technology Presentation (Dr Nidhi Goel lecturer) 22/12/2016
  • 3. Brief History • Poly(vinyl acetate) was discovered in Germany in 1912 by Fritz Klatte. • The monomer, vinyl acetate, was first produced on an industrial scale by addition of acetic acid to acetylene with a mercury(I) salt but it is now primarily made by palladium catalyzed oxidative addition of acetic acid to ethylene. • Polyvinyl acetate is prepared by polymerization of vinyl acetate monomer (free radical vinyl polymerization of the monomer vinyl acetate).
  • 4. INTRODUCTION • it is a colorless, nontoxic thermoplastic resin prepared by the polymerization of vinyl acetate. Polyvinyl acetate (PVAC) It is one of the most widely used water-dispersed resins. • Polyvinyl acetate water-based emulsions have been used as latex house paints, artists' media (since 1945), and common household white glues.. • Poly(vinyl acetate) (PVA, PVAc, poly(ethenyl ethanoate) • It is commonly referred to as wood glue, white glue, carpenter's glue, school glue, Elmer's glue in the US, or PVA glue) • It is an aliphatic rubbery synthetic polymer with the formula (C4H6O2)n. It belongs to the polyvinyl esters family with the general formula - [RCOOCHCH2]-.
  • 5. PROPERTIES Under alkaline conditions, boron compounds such as boric acid or borax cause the polymer to cross-link. A number of microorganisms can degrade polyvinyl acetate(fungi and algae). Sets by the removal of water due to evaporation or absorption into a substrate.  Have good weather resistance Withstand water, grease, oil, and petroleum fuels degradation. good biodegradation resistance poor resistance to creep under load. Softens at 30-45C Soluble in benzene, chloroform, methanol, acetone, butyl acetate Insoluble in ligroin, diethyl ether, butanol, turpentine, water, oils Can absorb 3-5% water when immersed for 16 hours at 60 C. Burns with a dark yellow flame that smells of acetic acid. Combustible.
  • 6. Uses • PVA water-based emulsions have been used as latex house paints. • Making commonly used household white glues. • Making wood glue. • Makin paper glue. • Adhesives. • Glues for porous material. • Used as a primer for drywall and other substrates. • As a mortar additive.
  • 7. 7 Mechanism (free radical Polymerization)