My concern is the relation between hydrogen and IV(instric viscosity) of propylene ethylene rubber in block copolymer as MFR is changed from high to low or low to high. Generally I know IV is proportional to hydrogen amount. Much to the strange, when changing grade from low MFR grade to high MFR which have simular IV of PER, we should overshoot the hydrogen to maintain the same IV value. I'm not clear in this point why it happen.
For your understanding, let me explain our process simply. It's a Hypol1(MPC) which has 4 reactors. Two of them are cstr(liquid phase) and the other is gas phase reactors. From 1st to 3rd reactor, we make homo and then block copoly is made in the 4th reactor.
IV control of block copolymer
Dear Everyone!
I'm a production engineer of PP plant.
Is there anyone who makes me clear?
My concern is the relation between hydrogen and IV(instric viscosity) of propylene ethylene rubber in block copolymer as MFR is changed from high to low or low to high. Generally I know IV is proportional to hydrogen amount. Much to the strange, when changing grade from low MFR grade to high MFR which have simular IV of PER, we should overshoot the hydrogen to maintain the same IV value. I'm not clear in this point why it happen.
For your understanding, let me explain our process simply. It's a Hypol1(MPC) which has 4 reactors. Two of them are cstr(liquid phase) and the other is gas phase reactors. From 1st to 3rd reactor, we make homo and then block copoly is made in the 4th reactor.
Many thanks
Y.W.Lee
Assistant Manager
PP Production Team
Samsung Total Petrochemical
Tel : +82-41-660-6742 Fax : +82-41-660-6737
Mailto:yw4279.lee@samsung.com
http://www.SamsungChem.Com ■