All Topics  
Ethylene-vinyl acetate

 

 
   Email Print
   Bookmark   Link
 

 

Ethylene-vinyl acetate
 
 
  Topics Ethylene-vinyl acetate Topic Home

Ethylene vinyl acetate (CAS# 24937-78-8, also known as EVA) is the copolymer
Heteropolymer

A heteropolymer or copolymer is a polymer derived from two monomeric species, as opposed to a homopolymer where only one monomer is used....
 of ethylene
Ethylene

Ethylene is the chemical compound with the formula C2H4. It is the simplest alkene. Because it contains a carbon-carbon double bond, ethylene is called an unsaturated hydrocarbon or an olefin....
 and vinyl acetate
Vinyl acetate

Vinyl acetate is an organic compound with the Chemical formula CH3COOCH=CH2. A colorless liquid with a pungent odor, it is the precursor to polyvinyl acetate , an important polymer in industry....
. The weight percent vinyl acetate usually varies from 10 to 40%, with the remainder being ethylene.

It is a polymer
Polymer

A polymer is a large molecule composed of repeating structural units typically connected by covalent chemical bonds. While polymer in popular usage suggests plastic, the term actually refers to a large class of natural and synthetic materials with a variety of properties....
 that approaches elastomer
Elastomer

An elastomer is a polymer with the property of elasticity. The term, which is derived from elastic polymer, is often used interchangeably with the term rubber, and is preferred when referring to vulcanization....
ic materials in softness and flexibility, yet can be processed like other thermoplastic
Thermoplastic

A thermoplastic is a polymer that turns to a liquid when heated and freezes to a very glassy state when cooled sufficiently. Most thermoplastics are high-molecular mass polymers whose Chain s associate through weak Van der Waals forces ; stronger dipole interactions and hydrogen bonding ; or even stacking of aromatic rings ....
s. The material has good clarity and gloss, barrier properties, low-temperature toughness
Toughness

Toughness, in materials science and metallurgy, is the resistance to fracture of a material when stress . It is defined as the amount of energy per volume that a material can absorb before rupture ....
, stress-crack resistance, hot-melt adhesive
Adhesive

Adhesive or glue is a compound in a liquid or semi-liquid state that adhesion or bonds items together. Adhesives may come from either natural or Chemical synthesis sources....
 water proof properties, and resistance to UV radiation.






Discussion
Ask a question about 'Ethylene-vinyl acetate'
Start a new discussion about 'Ethylene-vinyl acetate'
Answer questions from other users
Full Discussion Forum



Recent Posts

What makes ethylene-vinyl acetate water resistant? Is it a physical process or a chemical process?








Encyclopedia


Ethylene vinyl acetate (CAS# 24937-78-8, also known as EVA) is the copolymer
Heteropolymer

A heteropolymer or copolymer is a polymer derived from two monomeric species, as opposed to a homopolymer where only one monomer is used....
 of ethylene
Ethylene

Ethylene is the chemical compound with the formula C2H4. It is the simplest alkene. Because it contains a carbon-carbon double bond, ethylene is called an unsaturated hydrocarbon or an olefin....
 and vinyl acetate
Vinyl acetate

Vinyl acetate is an organic compound with the Chemical formula CH3COOCH=CH2. A colorless liquid with a pungent odor, it is the precursor to polyvinyl acetate , an important polymer in industry....
. The weight percent vinyl acetate usually varies from 10 to 40%, with the remainder being ethylene.

It is a polymer
Polymer

A polymer is a large molecule composed of repeating structural units typically connected by covalent chemical bonds. While polymer in popular usage suggests plastic, the term actually refers to a large class of natural and synthetic materials with a variety of properties....
 that approaches elastomer
Elastomer

An elastomer is a polymer with the property of elasticity. The term, which is derived from elastic polymer, is often used interchangeably with the term rubber, and is preferred when referring to vulcanization....
ic materials in softness and flexibility, yet can be processed like other thermoplastic
Thermoplastic

A thermoplastic is a polymer that turns to a liquid when heated and freezes to a very glassy state when cooled sufficiently. Most thermoplastics are high-molecular mass polymers whose Chain s associate through weak Van der Waals forces ; stronger dipole interactions and hydrogen bonding ; or even stacking of aromatic rings ....
s. The material has good clarity and gloss, barrier properties, low-temperature toughness
Toughness

Toughness, in materials science and metallurgy, is the resistance to fracture of a material when stress . It is defined as the amount of energy per volume that a material can absorb before rupture ....
, stress-crack resistance, hot-melt adhesive
Adhesive

Adhesive or glue is a compound in a liquid or semi-liquid state that adhesion or bonds items together. Adhesives may come from either natural or Chemical synthesis sources....
 water proof properties, and resistance to UV radiation. EVA has little or no odor and is competitive with rubber
Rubber

Natural rubber is an elastomer?an Elasticity_ hydrocarbon polymer?that was originally derived from a milky colloidal suspension, or latex , found in the sap of some plants....
 and vinyl
Vinyl

A vinyl compound is any organic compound that contains a vinyl group , −CarbonHydrogenCovalent bondCH2. These are derivatives of ethene, CH2=CH2, with one hydrogen atom replaced with some other group....
 products in many electrical applications.

EVA foam
Foam

The most general definition of foam is a substance that is formed by trapping many gas bubbles in a liquid or solid. It can also refer to anything that is analogous to such a phenomenon, such as quantum foam....
 is used as padding in equipment for various sports such as ski boots, hockey
Hockey

Hockey is any of a family of sports in which two teams compete by trying to maneuver a ball, or a hard, round, rubber or heavy plastic disc called a Hockey puck, into the opponent's net or goal, using a hockey stick....
, boxing
Boxing

Boxing is a combat sport where two participants, generally of similar human weight, fight each other with their fists. Boxing is supervised by a referee and is typically engaged in during a series of one to three-minute intervals called rounds....
, mixed martial arts
Mixed martial arts

Mixed martial arts is a Contact sport combat sport that allows a wide variety of fighting techniques, from a mixture of martial arts traditions and non-traditions, to be used in competitions....
, wakeboard boots, and waterski boots.

EVA is also used in biomedical engineering
Biomedical engineering

Biomedical engineering is the application of engineering principles and techniques to the medical field. It combines the design and problem solving skills of engineering with medical and biological sciences to help improve patient health care and the quality of life of individuals....
 applications as a drug delivery
Drug delivery

Drug delivery is the method or process of administering a pharmaceutical compound to achieve a therapeutic effect in humans or animals . Drug Delivery technologies are patent protected formulation technologies that modifies drug release profile, absorption, distribution and elimination for the benefit of improving product efficacy & safety a...
 device. The polymer is dissolved in an organic solvent (e.g., methylene chloride). Powdered drug and filler (typically an inert sugar) are added to the liquid solution and rapidly mixed to obtain a homogeneous mixture. The drug-filler-polymer mixture is then cast into a mold at -80 degrees and freeze dried until solid. These devices are used in drug delivery research to slowly release a compound over time. While the polymer is not biodegradable within the body, it is quite inert and causes little or no reaction following implantation.

Hot glue
Hot glue

Hot melt adhesive is a form of thermoplastic adhesive that is commonly supplied in solid cylindrical sticks of various diameters, designed to be melted in an electric hot glue gun....
 sticks are usually made from EVA, usually with additives like wax
Wax

Wax has traditionally referred to a substance that is secreted by bees and used by them in constructing their honeycombs.It is an imprecisely defined term generally understood to be a substance with properties similar to beeswax, namely...
 and resin
Resin

Resin is a hydrocarbon secretion of many plants, particularly Pinophyta. It is valued for its chemical constituents and uses, such as varnishes and adhesives, as an important source of raw materials for organic synthesis, or for incense and perfume....
. EVA is also used as a clinginess-enhancing additive in plastic wrap
Plastic wrap

Plastic wrap is a thin plastic film typically used for sealing food items in containers to keep them fresh. Plastic wrap, typically sold on rolls in boxes with a cutting edge, clings to many smooth surfaces and can thus remain tight over the opening of a container with no adhesive or other devices....
s.

EVA is typically used as a shock absorber in sports shoes, for example. EVA can be recognized in many Crocs
Crocs

Crocs Inc. is a shoe manufacturer founded by entrepreneur George B. Boedecker., Jr to produce and distribute a plastic Clog originally acquired from a Canadian company....
 brand shoes and accessories, in the form of a foam called croslite.

It is also used in the photovoltaics industry as an encapsulation material for silicon cells in the manufacture of photovoltaic module
Photovoltaic module

In the field of photovoltaics, a photovoltaic module or photovoltaic panel is a packaged interconnected assembly of photovoltaic cells, also known as solar cells....
s.

EVA is one of the materials popularly known as 'expanded rubber' or 'foam rubber'.

EVA is used in Orthotics

EVA is used in Fire Safe Cigarettes.

EVA is used in the manufacture of some artificial flowers because it is easily cut from sheets of the material and molded to shape.

EVA slippers and sandals are nowadays very popular because of its properties like light weight, easy to mould, odourless, glossy finish, and cheaper compared to natural Rubber.

EVA is also used as a cold flow improver for diesel fuel. EVA is also used as a separater in HEPA Filter.