It is vital to remember that norbornene is a white solid with a sour odor and features cyclic hydrocarbon. Production starts with the Diels-Alder reaction of ethylene and cyclopentadiene.
Additional components include norbornadiene, which features two double bonds with the same carbon skeleton, while hydrogenation of norbornene leads to norbornane.
They are essential monomers for ROMP or ring-opening metathesis polymerization. Of course, you will need specific catalysts to create this reaction. As a result, polynorbornenes feature high optical clarity and glass transition temperatures.
Its applications are most common in grip improvements, anti-impact, and anti-vibration industries, which you should remember.
Ethylene Norbornene
You should know that ENB or ethylene norbornene is an organic compound that features a combination of norbornene with an ethylene group attached to it.
We are talking about the monomer used to produce EPDM or commercial polymer, also known as EPDM rubber.
Things to Remember About EPDM Rubber
One of the most popular options for rubber,primarily due to its durability, is the EPDM one. The best thing about it is a synthetic elastomer, weather resistance and aging, UV, ozone, weathering, and heat resistance, among other things.
It is also the perfect solution for electrical insulation, mainly because it can act as a compression set for both low and hightemperatures.
EPDM rubber is resistant to fluids, including antifreeze or ethylene glycol, water, and vegetable-based hydraulic fluids, and water-based chemicals. It features resistance to liquid fertilizers, mild acids, and brake fluids, among other things.
The Common EPDM Applications
You should know it is the fastest growing and prominent synthetic rubber that features specialty and general-purpose applications.
The largest industry that uses it is automotive because it comes with high weather and heat resistance, flexibility, and vibration-absorbing characteristics.
The most common automotive industry applications include:
- Rub strips
- Weatherstripping
- Braking system
- Door and window seals
- Heater and radiator hoses
- Cable and wire connectors
Still, itdoes not come with hydrocarbon, gasoline, and oil resistance, which you should remember. At the same time, it comes with limited compression resistance to metals and fabrics.
You should click here to learn more about EPDM rubber.
Physical Characteristics
EPDM or elastomer comes with numerous factors to determine its efficiency, including compression set, elongation, tensile strength, and durometer.
Most people are not familiar with these terms, so we decided to help you out with the process.
The best way to ensure guidance of rubber materials is to check out different specifications from ASTM or the American Society for Testing and Materials and SAE, or the Society of Automotive Engineers.
Since rubber components come with significant specifications, you should think about finding the one that features D2000, a standard for numerous industries, including construction, medical, and aerospace, among others.
- Durometer –We are talking about a standardized process that will help you measure the thickness of plastics and rubber. It comes with a scale that goes from zero to a hundred, and the higher number you get, the thicker compound it is. A standard measure for EPDM is 70 Shore A, which means that 90 Shore A is too thick, while 60 Shore A is soft.Remember that EPDM comes with a wide range of thicknesses that can go from 30 to 90 Shore A depending on your needs and requirements.
- Elongation – You probably understand that elongation is a measure of how much a particular product can stretch before it breaks. It comes in the form of a percentage that will depict on size of the product while combining, starting with the breaking point. The most common elongation for this rubber is six-hundred percent, which means it can elongate six times more than its original size. It is vital to remember that this percentage is not specific to D2000 requirements.
- Tensile Strength –We are talking about scratch resistance of a particular material you wish to use. Therefore, it comes with a pound-per-inch measurement, which means you will get 2031 psi based on the D2000 specification. However, the range goes between five-hundred and two-thousand and five-hundred psi.
- Compression Set – Finally, the compression set is the amount of deformation when you compress material for deformation, temperature, and time. Regarding D2000 requirements for EPDM rubber, you should know that it features a compression set such as twenty-two hours at 125-degrees C, while a permanent set is twenty-five percent. It means that you will not be able to recover twenty-five percent of the original size after compression.
Other Applications
Besidesthe automotive industry, EPDM rubber is popular for flat roofs due to low-maintenance expenses and durability.
You can use it as a roofing membrane that will not affect rainwater, especially if you are harvesting it.
If you wish to learn how to clean a rubber roof, we recommend you to check out this guide: https://www.wikihow.com/Clean-a-Rubber-Roof for more information.
You can also use EPDM rubber for solar panels, electrical insulation, belts, speaker cone surrounds, and heart conductors.