Which among the following statements about HDP is NOT true?
Which among the following statements about HDP is NOT true?
It melts at low temperature than LDP.
It is manufactured by applying low pressure than LDP manufacture process.
It is stiffer than LDP.
It is crystalline.
Solution
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. $110^{\circ} \mathrm{C}$
Polyethylene (low density, m. p. $110^{\circ} \mathrm{C}$