List of top Polymer Science and Engineering Questions on Kinetics of polymerization asked in GATE XE

A particular free radical polymerization process yields a polymer with a number averaged degree of polymerization, \( \overline{x_n} = 100 \). The monomer concentration is doubled and the initiator concentration is increased by four times. Assuming that all rate coefficients and other parameters remain unchanged, the value of \( \overline{x_n} \) (rounded off to the nearest integer) is \(\underline{\hspace{2cm}}\).
A polymer is synthesized from 2 moles of terephthalic acid (molecular weight of the repeat unit, (-OCC6H4CO-), is 132 g/mol), 1 mol of ethylene glycol (molecular weight of the repeat unit, (-OCH2CH2O-), is 60 g/mol), and 1 mol of butylene glycol (molecular weight of the repeat unit, (-O(CH2)4O-), is 88 g/mol). The reaction is terminated at 99% conversion of the acid. The number averaged molecular weight, \( \overline{M_n} \) (rounded off to the nearest integer) is \(\underline{\hspace{2cm}}\) g/mol.