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Analysis of the Influence of Processing Conditions on the Supramolecular Structure and Antioxidant Distribution in PP‐Pipes Using Infrared Microscopy
Author(s) -
Brüll Robert,
Geertz Guru,
Kothe Hans,
Macko Tibor,
Rudschuck Michael,
Wenzel Mirko,
Engelsing Kurt,
Wüst Jürgen,
Bastian Martin
Publication year - 2008
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.200700360
Subject(s) - crystallinity , materials science , fourier transform infrared spectroscopy , supramolecular chemistry , extrusion , layer (electronics) , composite material , chemical engineering , crystallography , crystal structure , chemistry , engineering
The supramolecular structure in pipe walls of isotactic PP‐R is a function of compound composition and processing parameters, which both influence the mechanical properties of the pipes. µFTIR shows a gradient of the crystallinity across the pipe wall, with a lower‐crystalline outer layer, and a higher‐crystalline core layer. The rate of extrusion has an influence on the thickness of the outer layer. The nucleating effect on the morphological profile throughout the pipe wall can be visualised. µFTIR shows a homogeneous distribution of the primary antioxidant in the pipe wall. Both the spectral crystallinity and the antioxidant concentration distribution are calculated.