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DuPont Mobility and Materials VTR 8655 (GBL-S) Peroxide Cured Fluoroelastomer (FKM)  (discontinued **)
Categories: Polymer; Thermoset; Fluoropolymer, TS; Thermoset Fluoroelastomer; Rubber or Thermoset Elastomer (TSE)
Material Notes: VTR-8655 is a 68% fluorine, peroxide-cured, Viton® polymer similar to VTR-8650 but with a significantly lower gum polymer viscosity of ~25 (ML at 121°C). VTR-8655 utilizes Advanced Polymer Architecture technology which includes a new peroxide cure site along with an optimized molecular weight distribution designed to deliver a polymer which:
  • Is ideal for blending with VTR-8650 to reach intermediate viscosity ranges
  • Cures exceptionally fast to a high state of cure
  • Shows improved mold release/mold fouling properties compared to Viton® GBL-200
  • Shows improved mold flow and less shear sensitivity than 65 Mooney VTR-8650
  • Shows excellent physical properties with high elongation, both original and aged
  • Shows similar heat, fluids, and low temperature resistance compared to Viton® GBL-200
  • Shows improved water resistance/volume swell in water compared to Viton® GBL-200
  • Shows excellent compression set resistance with either low or no postcure

Information provided by manufacturer.
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Mechanical PropertiesOriginal ValueComments
Hardness, Shore A 70Cured 7 min at 177°C and Post Cured 2 hr at 232°C
Tensile Strength, Ultimate 19.6 MPaCured 7 min at 177°C and Post Cured 2 hr at 232°C
Tensile Strength, Yield 0.000700 GPa10% Modulus, Cured 7 min at 177°C and Post Cured 2 hr at 232°C
Elongation at Break 289 %Cured 7 min at 177°C and Post Cured 2 hr at 232°C
100% Modulus 0.00420 GPa
@Strain 100 %		Cured 7 min at 177°C and Post Cured 2 hr at 232°C
Compression Set 11 %
@Temperature 200 °C		Method B, O-rings 22 hr at 200°C (Post Cured 4 hr at 232°C)
 
Thermal PropertiesOriginal ValueComments
Glass Transition Temp, Tg -18.8 °CMDSC, postcured
 
Component Elements PropertiesOriginal ValueComments
Fluorine, F 68 %
 
Descriptive Properties
Formulation as Tested100VTR 8655
 2Varox® DBPH-50
 3Zinc Oxide
 3Diak™ 7 (TAIC)
 30N990 Carbon Black

**
Materials flagged as discontinued () are no longer part of the manufacturer’s standard product line according to our latest information. These materials may be available by special order, in distribution inventory, or reinstated as an active product. Data sheets from materials that are no longer available remain in MatWeb to assist users in finding replacement materials.

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Users viewing this material also viewed the following:
DuPont Mobility and Materials VTR GLT Peroxide Cured Fluoroelastomer (FKM) Formulation
Chemours Viton® GBLT-600S with 5-MT Black Fluoroelastomer Compound
DuPont Mobility and Materials VTR 8655 (GBL-S), VTR 8650 8655/8650 Blend
DuPont Mobility and Materials VTR 8600 (GF-S) Peroxide Cured Fluoroelastomer (FKM)

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