Perfluoroethylene propylene

Name: Perfluoroethylene propylene
SKU: 0

CAS No.: 25067-11-2
Molecular Formula: (C₂F₄)ₘ(C₃F₆)ₙ。‌‌
Molecular weight: 200,000–600,000 g/mol

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Perfluoroethylene propylene (FEP, also known as F46, is a copolymer of tetrafluoroethylene (TFE) and approximately 15% hexafluoropropylene (HFP). It is a thermoplastic fluoroplastic that combines the chemical inertness, temperature resistance, and electrical insulation properties of polytetrafluoroethylene (PTFE) with melt-processable thermoplasticity.

Common Name	Fluorinated Ethylene Propylene Copolymer (FEP)
Alias	Perfluoro(ethylene-propylene) Copolymer, Tetrafluoroethylene-Hexafluoropropylene Copolymer, F46, FEP
English Name	Fluorinated Ethylene Propylene Copolymer (FEP)
Molecular Formula	(C₂F₄)ₙ·(C₃F₆)ₘ
CAS Registry Number	25067-11-2
Chemical Structure	Random copolymer of Tetrafluoroethylene (TFE) and Hexafluoropropylene (HFP), with a perfluorocarbon main chain and trifluoromethyl (-CF₃) side chains
Regular Product Forms	Milky white translucent granules, white powder, transparent/translucent films, pipes, rods, etc.
Core Properties	Combines the corrosion resistance, insulation, and non-stick properties of Polytetrafluoroethylene (PTFE), while also having thermoplasticity for melt processing; it is a perfluorinated material that can be processed by injection molding, extrusion, and blow molding

Melting Point	255~265 ℃	ASTM D2116, GB/T 4608, DSC Method
Glass Transition Temperature (Tg)	~-85 ℃	DSC Method
Heat Deflection Temperature (HDT)	~50 ℃	ASTM D648, 0.45MPa Load
Long-term Continuous Service Temperature	-85~200 ℃	Can be used stably for a long time at 200℃, and can withstand -200℃ at low temperature
Instantaneous Peak Temperature Resistance	230 ℃	Maximum temperature that can be withstood for a short time
Brittleness Temperature	≤-90 ℃	ASTM D746, GB/T 5470
Thermal Decomposition Temperature	≥400 ℃	Under nitrogen atmosphere, Thermogravimetric Analysis (TGA), 1% weight loss temperature
Linear Expansion Coefficient	8.0~10.0 ×10⁻⁵ /℃	ASTM D696, GB/T 1036, -50~200℃
Thermal Conductivity	0.20~0.25 W/(m·K)	ASTM C177, GB/T 10294, 25℃
Melting Point	255~265 ℃	ASTM D2116, GB/T 4608, DSC Method
Glass Transition Temperature (Tg)	~-85 ℃	DSC Method
Heat Deflection Temperature (HDT)	~50 ℃	ASTM D648, 0.45MPa Load
Long-term Continuous Service Temperature	-85~200 ℃	Can be used stably for a long time at 200℃, and can withstand -200℃ at low temperature
Instantaneous Peak Temperature Resistance	230 ℃	Maximum temperature that can be withstood for a short time
Brittleness Temperature	≤-90 ℃	ASTM D746, GB/T 5470
Thermal Decomposition Temperature	≥400 ℃	Under nitrogen atmosphere, Thermogravimetric Analysis (TGA), 1% weight loss temperature
Linear Expansion Coefficient	8.0~10.0 ×10⁻⁵ /℃	ASTM D696, GB/T 1036, -50~200℃
Thermal Conductivity	0.20~0.25 W/(m·K)	ASTM C177, GB/T 10294, 25℃

Product Usage

Used for making linings for pipes and chemical equipment, surface layers for rollers, and various wires and cables, such as aircraft hook lines, booster cables, alarm cables, flat cables, and oil well logging cables.

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