Using either SEC or GPS the lab can give a curve with information on the distribution of a polymer sample.
However this curve has to be integrated in order to get the distribution data. At the same time this curve will typical have a large number of points, maybe around 1000 so a smaller distribution with the same shape is needed to perform calculations.
This function lets the user integrate a SEC/GPS curve and at the same time generate a distribution of a wanted size.
The integration method is Trapeze giving N-1 pseudo components.
To use the function use either the Distribution wizard or the calculation wizard.
The wizard prepares a range where the user can enter the SEC data. The routine will try to read all the cells but only the cells with a valid double in both cells are used.
Input
Argument |
Type |
Optional |
Description |
SECData |
Range of double |
No |
2 columns and a number of rows with the SEC/GPS information. Column 1: Log10 to the molar mass in units g/mole Column 2: The derivative obtained in the lab. |
Size |
C# : int |
No |
Number of pseudo components in the second distribution. |
Mn |
C# : object (Expect a double) |
Yes |
The value of Mn obtained in the lab. The value given here is only used for comparison with integrated value |
Mw |
C# : object (Expect a double) |
Yes |
The value of Mw obtained in the lab. The value given here is only used for comparison with integrated value |
Mz |
C# : object (Expect a double) |
Yes |
The value of Mz obtained in the lab. The value given here is only used for comparison with integrated value |
ProjectSheet |
C#: object |
Yes |
Lets the user set the project sheet to use. |
AdvVLXE |
C# : object |
Yes |
Advanced used. Reserved for use by VLXE. |
AdvUser |
C# : object |
Yes |
Advanced used. Reserved for the user. For example it can be used to force the function update. |
Extra
This function is defined in C# as:
public Object[,] SECFit(Range SECData, int Size, [In, Optional] object Mn, [In, Optional] object Mw, [In, Optional] object Mz, [In, Optional] object AdvVLXE, [In, Optional] object AdvUser)
Below is a screen dump where some data has been generated and a smaller distribution with 100 pseudo components has been
generated that match the experimental data.
