What temperature does PTFE decompose?

What temperature does PTFE decompose?

Safety. While PTFE is stable and nontoxic at lower temperatures, it begins to deteriorate at temperatures of about 260 °C (500 °F), it decomposes above 350 °C (662 °F), and pyrolysis occurs at temperatures above 400 °C (752 °F).

What temperature can PTFE stand?

PTFE, however, can be used continuously at temperatures up to 260°C, while possessing still a certain compressive plasticity at temperatures near to the absolute Zero.

Is PTFE thermally stable?

POLYTETRAFLUOROETHYLENE is notable among addition polymers for its high thermal stability. It decomposes at temperatures above about 400° C. to give tetrafluoroethylene as primary product1.

Why is PTFE melting point so high?

The compact interlocking of Fluorine atoms alongside stronger and stable C-F bonds are the reasons for high heat stability (melting point of 327°C) of PTFE. The electron affinity causes F atoms to be negatively charged and expected to have higher intra-molecular and intermolecular forces.

Does PTFE degrade over time?

However, PTFE coatings can undergo strong degradation during use in high-speed cooking processes and their performances strongly decrease overtime because of the severe operating conditions [6]. Lifespan of such coatings is highly variable and depends on many factors.

Why does PTFE have high thermal stability?

Teflon is a thermoplastic which is capable of repeatedly softening on heating and hardening on cooling but Teflon’s thermal stability and chemical inertness is due to its high C−C bond energy.

Does PTFE conduct heat?

For example the high thermal stability and its low thermal conductivity make PTFE an excellent high temperature insulation.

How does polytetrafluoroethylene degrade?

The degradation of polytetrafluoroethylene (PTFE) by high energy radiation with a high dose and in presence of oxygen forms perfluorinated carboxylic acids, among other compounds. In an inert atmosphere (in nitrogen) mixtures of perfluorinated olefines and paraffins of different chain length ranges are obtained.

Does PTFE have a shelf life?

When stored in normal warehouse conditions, all PTFE and Rulon materials have an unlimited shelf life. In fact, a common industry joke is that, at 85 years and counting, PTFE has “not been around long enough” to determine how long it will last!

What is the expansion of PTFE?

Polytetrafluoroethylene (PTFE) Material Properties

Property Metric English
Specific Heat Capability 970 – 1.09e3 0.232 – 0.26
Thermal Expansion Coefficient 1.2e-4 – 1.7e-4 66.7 – 94.4
CO2 Footprint 7.06 – 7.8 7.06 – 7.8

Is PTFE thermally conductive?

However, pure PTFE has a low thermal conductivity of ∼0.3 W (m K)−1,4 which limits its application in engineering.

Why is Teflon chemically inert?

Teflon is chemically inert, due to presence of C-F bond.

How do you melt PTFE?

I want to look at some of the aspects of PTFE processing and compare them to the myths that I sometimes come across in the industry. Unlike other thermoplastics, PTFE can only be cold-moulded. That is, you cannot melt PTFE and inject it into a mould to give a desired end-shape.

How long does it take for Teflon to decompose?

about 4.4 million years
It has been estimated that the particles in Teflon will take about 4.4 million years to break down.

What is the shelf life of PTFE seals?