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Structural organization and transport properties of iPP/LLDPE blends solidified at controlled cooling rates
Author(s) -
Coccorullo Ivano,
Gorrasi Giuliana,
Pantani Roberto
Publication year - 2001
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.2071
Subject(s) - linear low density polyethylene , tacticity , amorphous solid , materials science , polyethylene , diffusion , polypropylene , crystallinity , composite material , polymer chemistry , polymer , thermodynamics , chemistry , crystallography , physics , polymerization
The structural organization of blends of isotactic polypropylene (iPP) and linear low‐density polyethylene (LLDPE), with different compositions, was studied and correlated with the thermal history followed by the samples during solidification from the molten state. The materials were cooled at two extreme controlled rates: 0.1 and 500°C/s. The resulting structure was investigated both in the crystalline and the amorphous phases. In particular, attention was focused toward the analysis of the diffusion parameters of dichloromethane vapors, and the morphological organization of the amorphous phases was interpreted using models that consider them (in terms of resistance to diffusion) combined in series and in parallel. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 2237–2244, 2001