Polyethylene:
Polyethylene (PE) is the common Polymer in the world, produced 85mt / year. This is due to the wide range of possible uses.
Depending on its melting point, the PE is divided into several categories: low, medium and high density,
each class with specific industrial applications.
It occurs in the following Forms:
High density Polyethylene (HDPE), ULDPE (ultra low density Polyethylene),
LLDPE (linear low density Polyethylene), MDPE (medium density Polyethylene),
HMWPE Polyethylene (high molecular weight) and UHMWPE (ultra high molecular weight).
Polymerization:
The Polymerization was taking place under high pressure (several hundred bars)
and high temperature (up to 290°C) but over the years the energy input has been
reduced by using catalytic systems.
Polyethylene Resins:
The Ziegler and metallocene catalyst families have proven to be very flexible at
coPolymerizing ethylene with other olefins and have become the basis for the wide
range of Polyethylene Resins available today, including very low density Polyethylene
and linear low-density Polyethylene.
What is Polyethylene used for:
Polyethylene is a member of the important family of polyolefin Resins. It is the most widely used Plastic in the world,
being made into products ranging from clear food wrap and shopping bags to detergent bottles and automobile fuel tanks.
Where is Polyethylene found:
A new plant is being constructed in Brazil for the production of Poly(ethene), from ethene, that is made from sugar cane via Bioethanol.
This is sometimes termed Bio-based poly(ethene) (Bio-based Polyethylene).
Is Polyethylene Synthetic or natural:
Examples of Synthetic Polymers include nylon, Polyethylene, Polyester, Teflon, and epoxy.
Natural Polymers occur in nature and can be extracted. They are often water-based.
Examples of naturally occurring Polymers are Silk, Wool, DNA, Cellulose and proteins.
What is the strongest Polymer:
The World Strongest Synthetic Fibers. Ultra high molecular weight Polyethylene fibers (UHMWPE) are extremely
strong and are the lightest of all ultra-strong fibers. The ultimate strength can exceed 3000 MPa.
What are the 2 types of Polymer:
Polymers are of two types: naturally occurring and Synthetic or man made. Natural Polymeric materials such as hemp,
shellac, amber, Wool, Silk, and natural rubber have been used for centuries. A variety of other natural
Polymers exist, such as Cellulose, which is the main constituent of wood and paper.
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