Abstract
The degree of branching (number of CH3 groups per 100 carbon atoms) of a series of commercial samples of polyethylene crystallized from the melt has been determined by i.r. spectroscopy using a method of band decomposition by means of a computer programme. For this purpose the spectral region 1320–1400 cm−1 was investigated. The absorption coefficient value for the CH3 symmetric deformation mode agrees very well with the value obtained by Willbourn using the compensation method [9].
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