Elastomeric Polymer

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.


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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