Premium
Izod impact fracture morphology of rubber‐toughened polysulfone and poly(phenylene sulfide) blends
Author(s) -
Cheung M.F.,
Plummer H. K.
Publication year - 1996
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.10380
Subject(s) - materials science , izod impact strength test , polysulfone , composite material , crazing , natural rubber , scanning electron microscope , sulfide , phenylene , ultimate tensile strength , polymer , metallurgy
Blends of polysulfone (PSF) and poly‐phenylene sulfide (PPS) exhibit ductile behavior, below 35% by weight PPS, under tensile loading conditions. However, the blends are notch sensitive to Izod impact. The use of a core‐shell type rubber‐modifier effectively toughens the blends. Notched Izod impact strength rises, from ∼ 50 J/m to about 900 j/m, by increasing rubber content from 0% to 10–15%. It remains constant at a rubber content > 10–15%. Scanning electron microscopy (SEM) is used to study the morphology of the fracture surfaces. At low modifier content (5%), smooth or mesa‐like fracture surfaces are observed. Voids and interfacial debonding are revealed. With a higher concentration of toughening agent (> 10%), some crazing is evidence but not consistent. However, matrix yielding and extensive plastic flow of the PSF/PPS matrix are seen throughout, with a higher level of rubber modifier.