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PREP C20 Frequently Asked Questions

We are aware that acquiring a lab instrument is an important decision, furthermore if Polyolefins’ research is related with your core business.

Although you can ask directly to our consultants whenever you want, you may prefer to know first the answers to the most typical questions about our instruments. Here are packed the most relevant questions about PREP C20.


Questions


Answers

Which is the purpose of PREP C20 instrument?
PREP C20 is a fully automated preparative pilot plant type equipment designed to fractionate, in a column support, high amounts of polymer according to its chemical composition by a Temperature Rising Elution Fractionation (TREF) process with no hot solvents handling.

Does PREP C20 provide the physical fractions?
Yes, it provides the different fractions corresponding to the temperature steps selected.

Does PREP C20 provide any analytical result or curves?
No. PREP C20 is a preparative instrument. An IR4 detector is incorporated, however its purpose is to ensure the column proper rinsing after each fraction; no analytical result is provided.

How many grams can be fractionated at once?
Up to 20g of polymer, depending on the nature of the sample.

How many fractions can be obtained from a parent sample?
Unlimited number of fractions (up to 9 fractions without exchanging bottles).

Which solvents can be used?
Any solvent compatible with viton o'rings and sealings can be used. To fractionate polyolefin samples, the solvents mainly used are TCB and oDCB.

What kind of sample preparation is required by the user?
No preparation of samples is required by the user other than weighing the dry sample and putting it inside of the vessel. The rest of the steps are performed by the instrument automatically: vessel filling, dissolution, column loading, fractions collection, final cleaning, etc.

How are the fractions recovered after the automated fractionation process?
After the automated fractionation process, fractions will be found separated in different glass vessels and mixed with solvent. By using any standard filtration system, fractions can be separated from the solvent and dried, to become ready to be weighed and analyzed by GPC, TREF, CRYSTAF, DSC, NMR, etc./p>

Do I need to handle solvents?
Solvents need to be handled only after the fractionation process, which is completely performed by the instrument.

After the automated fractionation process, fractions will be found separately in different glass vessels and mixed with solvent. By using any simple filtration system, fractions can be separated from the solvent and dried, to become ready to be weighted and analyzed by GPC, TREF, CRYSTAF, DSC, NMR, etc.

Which kind of polymers can be fractionated?
PREP C20 has been used to fractionate polyolefin mainly, but any polymeric sample might be fractionated by using any compatible solvent. Please refer to question 8: 'Which solvents can be used?'.

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