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Determination of total short‐chain branching in polyethylenes by computerized data processing of infrared spectra
Author(s) -
Dankovics A.,
Füzes L.
Publication year - 1983
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1983.070281212
Subject(s) - branching (polymer chemistry) , deconvolution , polyethylene , envelope (radar) , convolution (computer science) , infrared , infrared spectroscopy , analytical chemistry (journal) , materials science , mathematics , chemistry , algorithm , physics , optics , chromatography , computer science , composite material , organic chemistry , telecommunications , radar , machine learning , artificial neural network
A computer method is described to determine the short‐chain branching of polyethylene from IR spectroscopic data. The shape of the band at 1378 cm −1 (characteristic to the methyl side groups) was calculated by using first a deconvolution procedure (Ishige method) for the envelope curve of the overlapping peaks in the region of 1300‐1400 cm −1 , followed by a convolution calculus applied only to the deconvoluted points of the peak in question. The results were in good agreement with values determined by Willbourn's compensation method.