Vinyl Polymer Properties

Flexible vinyl film has good barrier properties to oil and grease but is oxygen permeable.

Vinyl polymer properties. What is polymeric vinyl. Polymeric vinyl is the repeating unit of a vinyl polymer. This versatility is a major advantage of vinyl polymers. Ethylene vinyl acetate properties ethylene vinyl acetate is a flexible and transparent thermoplastic.

Ethylene vinyl acetate or eva is a copolymer of ethylene and vinyl acetate with a structure as shown below. The carbon backbone is made out of carbon atoms bonded covalently with each other. Some differences are noted however with polymers in which x and y in 1 67 differ and neither is hydrogen. Vinyl polymers are the most common type of plastic.

Polyvinyl chloride pvc or vinyl is an economical and versatile thermoplastic polymer widely used in building and construction industry to produce door and window profiles pipes drinking and wastewater wire and cable insulation medical devices etc. Rigid sometimes abbreviated as rpvc and flexible. Eva is used in several applications thanks to the varied properties it possesses. It is located in the carbon backbone of the polymer.

Stereoregularity has relatively little effect on the mechanical properties of amorphous vinyl polymers in which the chiral carbons are trisubstituted. Pvc is the world s third most widely produced synthetic plastic polymer after polyethylene and polypropylene about 40 million tons of pvc are produced each year. Ethylene vinyl acetate copolymer eva properties and applications. To ensure lubricity and binding action in order to protect the fibers and help with handling sizing is a processing mechanism applied to rovings and yarns.

Vinyl polymers are a group of polymers derived from vinyl monomers of the type ch 2 chr. Ethylene vinyl acetate offers good low temperature flexibility. It is an extremely elastic and tough thermoplastic of excellent clarity and gloss and with little odor. It shows good chemical resistance.

Pvc comes in two basic forms. Their backbone is an extended alkane chain ch 2 chr ch 2 chr. Eva shows good barrier and stretch properties. In popular usage vinyl refers only to polyvinyl chloride pvc.

There are no double bonds found in the carbon backbone since the double bond is broken in order to make the monomer reactive in the polymerization process. While other vinyl polymers are prepared by polymerization of its corresponding monomer pva undergoes either partial or complete hydrolysis of polyvinyl acetate to remove acetate groups.