Dynisco 4001, Руководство пользователя

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Why do it?
How to do it
I.V. has been used to determine molecular weight relying on the key
assumptions of isolated flexible linear chains. You can eliminate the hindrances
of the expertise, laboratory and solvents required for solution measurements.
Improvements in process control are achievable using capillary rheometry
methods over solution measurements due to their simplicity and quick
turnaround.
IV correlation calculations are only enabled when IV is set to ACTIVE in the
SETUP mode. IV results are based on an empirical study that included various
PET resins.
A reference material of known IV is needed to calibrate the melt
indexer.
You must get an IV value for your material prior to testing.
Dry PET for 5 hours at 150 º C, use 6 grams material per test, clean machine
thoroughly and run at a temperature of 285 º C.
This option, if purchased (Models 4003/4004 only), enables only at 285
ºC
1.) Clean the orifice, piston rod and barrel thoroughly. This is very important!
Put piston rod back into barrel until temperature has locked.
2.) Enable IV calculations under the Setup on the indexer. Note that a typical
Pet test temperature is to 285
ºC.
3.) Set the following parameters accordingly in EDIT mode:
Acceptable Methods: A, A/B, B
Melt time: 360 sec
Temperature: 285 C
Flag: 2.54 cm
Weight: 2160 kg
Note: Always perform a purge run of a new sample
Example Settings/Procedures for known MFI’s
Flag
Length
(cm)
Method A
Time
(secs.)
Pull Plug
1.081 8 1.27 60 NA
0.975 10 2.54 40 270
0.950 16 1.27 40 220
0.749 35 2.54 20 30
0.705 43 2.54 20 30
0.662 57 2.54 20 15
0.660 53 2.54 10 40
0.626 73 2.54 10 25
0.556 11 2.54 10 15
0.554 143 2.54 10 0
0.389 180+ 2.54 5 0
4.) Perform a sample purge of material. Once done, clean thoroughly.
Series 4000 Melt Indexer Operation Manual
“Intrinsic Viscosity” Runs with PET
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