Difference between revisions of "Polyvinyl fluoride"

From CAMEO
Jump to: navigation, search
(Applications)
(Physical and Chemical Properties)
Line 24: Line 24:
  
 
== Physical and Chemical Properties ==
 
== Physical and Chemical Properties ==
is resistant to water, oils, solvents, acids and alkalis. It is used in
+
 
 
* Soluble in cyclohexanone, dimethyl formamide
 
* Soluble in cyclohexanone, dimethyl formamide
* Insoluble in water, oils, alcohols, acids, alkalis, bleaches.
+
* Affected by strong alkalis, ester and ketones.
 +
* Insoluble in water, oils, alcohols, acids, bleaches, weak alkalis
 
* Inert in most aliphatic, aromatic and chlorinated compounds.
 
* Inert in most aliphatic, aromatic and chlorinated compounds.
 
* Tenacity = 2.2-4.4 g/denier   
 
* Tenacity = 2.2-4.4 g/denier   
Line 34: Line 35:
 
* Density = 1.3-1.7
 
* Density = 1.3-1.7
 
* Refractive Index = 1.42
 
* Refractive Index = 1.42
 +
 
==Working Properties==
 
==Working Properties==
  

Revision as of 10:17, 29 July 2020

Description

A clear, tough, flexible thermoplastic resin formed from vinyl fluoride. Polyvinylidene fluoride (PVDF) [(CH2 – CF2)n] is a thermoplastic fluorinated polymer that was invented and patented by the DuPont Corporation in 1948. Developed as a coating, its first widespread commercial use was as a pigmented liquid coating called Kynar 500®. Today, PVDF is used as a coating for metals. It is often made into a copolymer with other fluorinated monomers in order to improve or modify its properties.

Synonyms and Related Terms

Polyvinylidene difluoride (PVDF); poly(vinylene fluoride); poli(fluoruro de vinilo) (Esp.); fluorure de polyvinyl (Fr.); polivinil fluoruro (It.); fluoreto de polivinilo (Port.); poly(vinyl fluoride); polyvinylfluoride (PVF), poly(1,1-difluoroethane)

Examples: Tedlar® [DuPont]; Kynar 500 (Arkema); Hylar 5000 (Solvay Solexis) ; Solef (Solvay); Sygef

Applications

  • Protective coatings, especially in stressful environments (high temperature, sun, acid, etc)
  • Acid resistant filters
  • Surgical sutures, medical devices
  • Electrical braids

Personal Risks

Collections Risks

Degrades with heat and light to produce hydrofluoric acid.

Environmental Risks

Physical and Chemical Properties

  • Soluble in cyclohexanone, dimethyl formamide
  • Affected by strong alkalis, ester and ketones.
  • Insoluble in water, oils, alcohols, acids, bleaches, weak alkalis
  • Inert in most aliphatic, aromatic and chlorinated compounds.
  • Tenacity = 2.2-4.4 g/denier
  • Elongation = 15-30%
  • Moisture regain = 0.04%
  • Melting Point = 170
  • Density = 1.3-1.7
  • Refractive Index = 1.42

Working Properties

Resources and Citations

  • Contributions: Catherine Stephens: AIC Plastics Panel, 2020.
  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • Pam Hatchfield, Pollutants in the Museum Environment, Archetype Press, London, 2002
  • J.Gordon Cook, Handbook of Textile Fibres:II Man-made Fibres, Merrow Publishing Co. , Durham, England 1984, p.520.

Retrieved from "http://cameo.mfa.org/index.php?title=Polyvinyl_fluoride&oldid=77504"