quality control of composition of black polymeres
DESCRIPTION
QUALITY CONTROL OF COMPOSITION OF BLACK POLYMERES. ANALYSIS OF NONTRANSPARENT POLYMERS. Aim: Industrial Quality Control of polymers Procedure Mixture design Attenuated Total Reflection Derivative spectroscopy Multivariate calibration. Calibration. Prediction. y. y. x. x. - PowerPoint PPT PresentationTRANSCRIPT
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QUALITY CONTROL OF
COMPOSITION OF
BLACK POLYMERES
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ANALYSIS OF NONTRANSPARENT POLYMERS
Aim:
Industrial Quality Control of polymers
Procedure
Mixture designAttenuated Total ReflectionDerivative spectroscopyMultivariate calibration
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Calibration Prediction
x
y y
x
xbby 10
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Instrumental (spectral) variables
Wavelength
Abs
orba
nce
SystemSelective a variable(The concentration of an analyte)
Wavelength
Abs
orba
nce
X
Y
Xbxfy )(
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A
B
C3-Component mixture
The mixture range of a three-componentsystem, is described by a triangular surfaceXA + XB + XC = 1 (closure)
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A B
C
A
B
C
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A B
C
15%
35%
60%80%
10%
0%
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ROI (Region of Interest)
1
6
17
5
15
7 4
14
2 3
10 11
12
13
98
16
18
Production TargetSample
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The Mixture Design
www.prs.no
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sample
PRESSURE
IR-beam,OUTIR-beam,IN
ZnSe-crystall
Attenuated Total Reflection (ATR)
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INTENSITY VS WAVENUMBERS
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Raw and 2nd derivative Spectra
www.prs.no
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2nd Derivative Spectra
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SAMPLE x(2nd derivatives of spectra)
y1 y2 y3
WAVENUMBER
PREDICTIVE /SPECTRAL VARIABLES
PREDICTED VARIABLES/CONCENTRATIONS
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PREDICTION
www.prs.no
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LOADINGS COMP. 1
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LOADINGS COMP. 2
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LOADINGS COMP. 3
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LOADINGS COMP. 4
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LOADINGS COMP. 5
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Attenuated Total Reflectance spectrum
2nd derivative spectrum
Concentrations
(Mixture space)
PREDICTION
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By looking at instrumental analysis as a way of numeric characterisation of complex system, the kinds of prediction analysis shown in this lecture can be performed to obtain any kind of property of a system that can be precisely represented by a continuous instrument profile.
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CHEMOMETRICS/QUALIMETRICS
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RAW MATERIAL(FEED)
MANUFACTURINGPROCESS
PRODUCT
QUALITY=f(NIR)
CONTROL=f(NIR)
QUALITY=f(NIR)
PROPERTY(QUALITY) <= NIRRELATIONSHIPS
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PROCESS CHEMOMETRICS
IDENTIFY CRITICAL STEPS
CONTROL?
NEW MEASUREMENTS?
NEW TOOLS?