MHT CET · Chemistry · Polymers
Which among the following statements about HDP is NOT true?
- A It melts at low temperature than LDP.
- B It is manufactured by applying low pressure than LDP manufacture process.
- C It is stiffer than LDP.
- D It is crystalline.
Answer & Solution
Correct Answer
(A) It melts at low temperature than LDP.
Step-by-step Solution
Detailed explanation
High-density polyethylene (HDPE)
It is obtained by coordination polymerization using Ziegler-Natta catalyst.
It has a higher melting point \(\left(130^{\circ} \mathrm{C}\right)\) and higher density \(\left(0.97 \mathrm{~g} \mathrm{~cm}^{-3}\right)\).
It has a linear polymer chain and hence has greater strength and heat resistance.
Polyethylene (low density, m. p. \(110^{\circ} \mathrm{C}\)
It is obtained by coordination polymerization using Ziegler-Natta catalyst.
It has a higher melting point \(\left(130^{\circ} \mathrm{C}\right)\) and higher density \(\left(0.97 \mathrm{~g} \mathrm{~cm}^{-3}\right)\).
It has a linear polymer chain and hence has greater strength and heat resistance.
Polyethylene (low density, m. p. \(110^{\circ} \mathrm{C}\)
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