What is HDP? How is it prepared ? Give its properties and uses.
Answers
Explanation:
High density polyethylene, often abbreviated to HDPE, is a polymer whose monomer is ethylene. It is a thermoplastic with a very high strength to density ratio. HDPE is a very versatile plastic that has a wide range of applications – from pipes to storage bottles. When compared to other plastics, the melting point of high density polyethylene is relatively high.
High density polyethylene is a hydrocarbon polymer that can be prepared from ethylene via a catalytic process. Some common catalysts used here include Ziegler–Natta catalysts, chromium/silica catalysts (Phillips catalyst), and metallocene catalysts.
- The numerous advantages of this polymer make it an ideal choice in the production of many materials. Some uses of HDPE are listed below.
- Bottle caps and bottles are made of this polymer.
It is also used in 3-D printing filaments
HDPE is used in the fuel tanks of several types of automobiles.
The piping system responsible for the distribution of natural gas is generally made of this polymer due to its resistance to corrosion and other attributes.
It is used in plastic lumber and wood plastic composites.
Skeletal and facial reconstruction surgeries (part of plastic surgery) involve the use of HDPE
hope this will help you
A thermoplastic polymer whose monomer unit is ethylene is called HDP that is, High density polyethylene.
Properties of HDP:
- The melting point of HDP is 130.8℃ and its density is 940 kg/m3
- HDP has high tensile strength and hardness and it is much stiffer than LDP.
- As compared to LDP It is more resistant to chemicals.
Uses of HDP:
- HDP is used in the manufacturing of household articles like buckets, dustbins, bottles, pipes, etc.
- It is used to prepare objects where high tensile strength and stiffness are required.