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Compatibilized linear low‐density polyethylene/isotactic polypropylene blends studied by positron annihilation lifetime spectroscopy
Author(s) -
Flaris V.,
Zipper M. D.,
Simon G. P.,
Hill A. J.
Publication year - 1995
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.760350105
Subject(s) - materials science , composite material , polypropylene , linear low density polyethylene , tacticity , positron annihilation spectroscopy , compatibilization , polyethylene , toughness , positron annihilation , spectroscopy , polyethylene terephthalate , positron lifetime spectroscopy , volume (thermodynamics) , positron , polymer , polymer blend , polymerization , thermodynamics , copolymer , electron , physics , quantum mechanics
Positron annihilation lifetime spectroscopy (PALS), capable of probing free volume, is used to study the effect of compatibilizer concentration, compatibilizer type, and the effect of blend processing on the morphology and properties of an immiscible linear low‐density polyethylene/polypropylene system. It is proposed that improvement of fracture toughness due to compatibilization can be attributed to the packing (and bonding) at interfaces. Improved interfacial packing and bonding result in lower free volume concentration than expected from component additivity, with a concomitant increase in plastic deformation on impact.