DuPont Mobility and Materials VTR GLT Peroxide Cured Fluoroelastomer (FKM) Formulation

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DuPont Mobility and Materials VTR GLT Peroxide Cured Fluoroelastomer (FKM) Formulation
Categories:	Polymer; Thermoset; Fluoropolymer, TS; Thermoset Fluoroelastomer; Rubber or Thermoset Elastomer (TSE)
Material Notes:	Viton® VTR-8500 is a peroxide cured polymer intended to be an upgrade to Viton® GLT. VTR-8500 utilizes an Advanced Polymer Architecture technology which includes a new peroxide cure site along with an optimized molecular weight distribution designed to deliver a polymer which: Cures exceptionally fast to a high state of cure Shows improved mold release/mold fouling properties compared to GLT and GLT 305 Shows improved mold flow, less shear sensitivity, and lower extruder die swell for a ~65 Mooney FKM Shows excellent physical properties with high elongation in either the original or aging tests Shows similar to improved heat, fluids, and low temperature resistance compared to GLT Shows excellent compression set resistance with little (2 hr at 232°C ) or no postcure It is recommended if mixing in an internal mixer to use at least a 70% load factor. The recommended process aid for VTR-8500 is 0.5 phr of Armeen® 18D. Information provided by manufacturer.
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Mechanical Properties	Metric	English	Comments

Hardness, Shore A	67	67	Cured 7 min at 177°C and Post Cured 16 hr at 232°C
Tensile Strength, Ultimate	17.6 MPa	2550 psi	Cured 7 min at 177°C and Post Cured 16 hr at 232°C
Tensile Strength, Yield	0.600 MPa	87.0 psi	10% Modulus, Cured 7 min at 177°C and Post Cured 16 hr at 232°C
Elongation at Break	181 %	181 %	Cured 7 min at 177°C and Post Cured 16 hr at 232°C
100% Modulus	5.90 MPa @Strain 100 %	856 psi @Strain 100 %	Cured 7 min at 177°C and Post Cured 16 hr at 232°C
Compression Set	16 % @Temperature 200 °C	16 % @Temperature 392 °F	Method B, O-rings 22 hr at 200°C (Cured 7 min at 177°C and Post Cured 16 hr at 232°C)

Thermal Properties	Metric	English	Comments
Brittleness Temperature	-30.6 °C	-23.1 °F	TR-10
Glass Transition Temp, Tg	-30.7 °C	-23.3 °F	DSC

Descriptive Properties
Formulation as Tested	100		Viton® VTR-8500
	3		Zinc Oxide
	3		Diak™ 7
	3		Luperox® 101-XL
	30		N990 Carbon Black

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PDVDA43 / 34012

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