System for processing of low viscosity polymers

A system comprising:

• a first pump;
• a pelletization system that comprises an underwater pelletizer;
• where the pelletization system is located downstream of the first pump and is in fluid communication with the first pump;
• a direct line that is located downstream of the first pump and upstream of the pelletization system;
• where the direct line does not contain a pump or a heat exchanger;
• and
• a bypass line that is located downstream of the first pump and upstream of the pelletization system;
• where the bypass line comprises a second pump;
• where the first pump is operative to discharge a polymer to the pelletization system via the direct line when the polymer has a melt viscosity greater than 105 centipoise;
• where the first pump is operative to discharge the polymer to the pelletization system via the bypass line when the polymer has a melt viscosity less than 105 centipoise,
• wherein the bypass line further comprises a heat exchanger that is configured to cool the polymer;
• and wherein the heat exchanger is located downstream of the second pump and upstream of the palletization system.