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Polyethylene‐polycarbonate blends: Interface modification, phase morphology and measurement of orientation development during cast film and tubular extrusion by infrared dichroism
Author(s) -
Endo Shigeru,
Min Kyonsuku,
White James L.,
Kyu Thein
Publication year - 1986
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760260109
Subject(s) - materials science , polycarbonate , polyethylene , phase (matter) , composite material , morphology (biology) , copolymer , extrusion , polymer blend , polymer , infrared , polymer chemistry , organic chemistry , optics , chemistry , biology , genetics , physics
The phase morphology and polymer chain orientation in polyethylene‐polycarbonte blends is investigated. A blend with a dispersed polyethylene phase was found to exhibit phase growth under quiescent conditions. Addition of a styrene‐(ethylene/butene) block copolymer controls the phase morphology and prevents phase growth. Melt spun tapes and tubular film have been prepared from polyethylene‐polycarbonate blends. Orientation of the crystallo‐graphic axes of the polyethylene and the chain axis of the polycarbonate were determined by infrared dichroism. The addition of polycarbonate to polyethylene is found to decrease chain orientation at the same drawdown stress.