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Liquid‐liquid phase separation in blends of a linear low‐density polyethylene with a low‐density polyethylene
Author(s) -
Hill Mary J.,
Puig Cristian C.
Publication year - 1997
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/(sici)1097-4628(19970906)65:10<1921::aid-app9>3.0.co;2-h
Subject(s) - differential scanning calorimetry , materials science , polyethylene , ternary operation , linear low density polyethylene , quenching (fluorescence) , polymer blend , phase (matter) , polymer chemistry , copolymer , low density polyethylene , composite material , analytical chemistry (journal) , polymer , thermodynamics , chemistry , organic chemistry , fluorescence , optics , physics , computer science , programming language
A linear low‐density butene copolymer, of overall branch content 3 mol %, has been blended with a low‐density polyethylene. The low‐density polyethylene has an overall branch content of 5 mol %, including both long and short branches. The two materials were blended in a wide range of compositions and the phase behavior investigated using indirect experimental methods, the examination of quenched blends by differential scanning calorimetry, and transmission electron microscopy. After quenching from temperatures up to 170°C, blends, of almost all compositions, show two crystal populations, separated on a micron scale. It is argued that this implies that the blends were phase separated in the melt before quenching. This behavior shows good agreement with predictions based on previous extensive studies of binary and ternary blends of linear with lightly branched polyethylenes. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 65: 1921–1931, 1997