Characterization of Melt Flow Index of Commercial Polystyrene Using Data from Interlaboratory Comparison

The melt flow index (MFI) of commercial polystyrene samples has been investigated throughout an interlaboratory comparison study. The homogeneity samples have been assessed prior to the distribution over the participants. The one-factor analysis of variance model has been applied to separate and eva...

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Bibliographic Details
Published in:MĀPAN : journal of Metrology Society of India 2021-03, Vol.36 (1), p.47-58
Main Authors: Abdel-Hakim, A., Al-harbi, Ahmed M., Sadek, A. M.
Format: Article
Language:English
Subjects:
Evaluation
Factor analysis
Heterogeneity
Homogeneity
Mathematical and Computational Physics
Mathematical Methods in Physics
Measurement Science and Instrumentation
Melt flow index
Normal distribution
Numerical and Computational Physics
Original Paper
Outliers (statistics)
Physics
Physics and Astronomy
Polystyrene resins
Regression analysis
Simulation
Stability analysis
Statistical analysis
Theoretical
Uncertainty
Variance analysis
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Summary:The melt flow index (MFI) of commercial polystyrene samples has been investigated throughout an interlaboratory comparison study. The homogeneity samples have been assessed prior to the distribution over the participants. The one-factor analysis of variance model has been applied to separate and evaluate the uncertainty components arising from the analytical method and the heterogeneity of the samples. It has been shown that the samples are sufficiently homogenous. The stability of the samples has been monitored over 6 months. The stability and the uncertainty arising from the instability of the samples have been evaluated throughout the linear regression analysis. No significant trend could be detected over the stability assessment period. The results reported by the participants have been investigated. An almost normal distribution shape has been obtained with no evidence for outlier or systematic bias. The MFI value has been evaluated as consensus value from the results reported by the participants with a standard combined uncertainty of ~ 2.2%.
ISSN:0970-3950
0974-9853
DOI:10.1007/s12647-020-00394-1