Elastomeric Polymers

An elastomer is a polymer with the property of viscoelasticity (colloquially “elasticity”), generally having notably low Young’s modulus and high yield strain compared with other materials. The term, which is derived from elastic polymer, is often used interchangeably with the term rubber, although the latter is preferred when referring to vulcanisates. Each of the monomers which link to form the polymer is usually made of carbon, hydrogen, oxygen and/or silicon. Elastomers are amorphous polymers existing above their glass transition temperature, so that considerable segmental motion is possible. At ambient temperatures rubbers are thus relatively soft (E~3MPa) and deformable. Their primary uses are for seals, adhesives and molded flexible parts.

Specifications

Polymer Family	Advantages	Disadvantages
PET	FDA, Easy fill, Medical applications, Ski boot strap	Limited Softness, Strong Acids and Bases
PUR	Wear, Caster treads, Pipe gaskets	Limited Softness, Sulphuric acid
PVC Ionomer	Colorable, Weatherable, Soft Grips, Sports equipment, Sunroof Seal	Wide softness range, Fuel, Acetone
PVC-NITRILE	Oil, Gasoline, Under the hood, Gaskets, Autoplug, Soft grip specialty	Not FDA, Fumes, Mold Deposits
TPVlcanate (PP)	Oil, Gasoline, Soft grip toll handles, Door Gaskets	Limited hardness, Surface appearance
SEBS (PP)	Appearance, Tacky feel, Semi weatherable, Bicycle grips, Shoe pieces	Sterilization, Hot Water, Wide softness range
SBS (PS)	Very tacky feel, Low durometer, Fishing lures, Tea stoppers	Sterilization, Hot Water, Tear Strength, Widest Range
EVA (HDPE)	Better Chemical resistance than POE-POP, FDA sports mouthpieces, Stiff gaskets, Lids	Limited Hardness, sticky Kerosene
PE, TPOE, POP	Low temp performance, FDA, Furniture guides, Clear vacuum hoses	Limited Hardness, Gasoline
Flexible PVC	Chemical resistance, Weatherable, Flexible, Suction cups, Electrical gaskets	Wide softness range, Fumes, Mold Deposits

Elastomeric Polymers

Elastomeric Polymers

Specifications

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