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Macromolecular orientation in drawn polypropylene, polyethylene and their blend, studied by NMR
Author(s) -
Murín Jozef,
Uhrin Ján,
Chodák Ivan
Publication year - 2001
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/1521-3900(200106)170:1<115::aid-masy115>3.0.co;2-a
Subject(s) - low density polyethylene , polypropylene , materials science , polyethylene , polymer blend , anisotropy , macromolecule , composite material , component (thermodynamics) , orientation (vector space) , polymer chemistry , polymer science , polymer , chemistry , thermodynamics , copolymer , physics , optics , mathematics , geometry , biochemistry
Drawn tapes made of polypropylene (PP), low density polyethylene (LDPE) and of their PP/LDPE blend (70/30 w/w) were studied by means of broad‐line NMR (Nuclear Magnetic Resonance). The parameters characterizing the anisotropy of the NMR second moments were used for estimation of macromolecular orientation in drawn tapes. A model for this particular blend was proposed on the basis of NMR experiments. According to this model the LDPE component of the drawn blend is oriented in a such extent as similarly drawn homopolymer unlike the PP component which is oriented to a much lower degree after drawing of the blend.