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Commercial, high‐impact polypropylenes: Composition and chain structure as revealed by temperature‐gradient extraction fractionation
Author(s) -
Mahdavi Hossein,
Enayati Nook Mojtaba
Publication year - 2012
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.35637
Subject(s) - differential scanning calorimetry , polypropylene , materials science , fractionation , elastomer , scanning electron microscope , branching (polymer chemistry) , fourier transform infrared spectroscopy , phase (matter) , composite material , analytical chemistry (journal) , chemical engineering , chromatography , chemistry , thermodynamics , organic chemistry , physics , engineering
Four different grades of commercial, high‐impact polypropylene (hiPP) were fractionated by temperature‐gradient extraction fractionation, and the chain structure and melting behavior of the fractions were studied by Fourier transform infrared spectroscopy and differential scanning calorimetry. Furthermore, the morphology of the disperse phase in the resins was characterized by scanning electron microscopy of the microtome‐cut etched and original samples. The results show that there was a strong relation between the chain structure, content, and distribution of the dispersed phase and the mechanical properties of hiPP. These parameters of the elastomeric phase are really critical in reaching the best rigidity‐impact balance in hiPP. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012