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The interfacial reaction of modified poly (arylether sulfone)s and polyaramides
Author(s) -
M¨︁ader Dietmar,
Coen Martine Collaud,
Kressler J¨︁org,
M¨︁ulhaupt Rolf,
Weber Martin
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(19970718)65:3<567::aid-app17>3.0.co;2-u
Subject(s) - materials science , x ray photoelectron spectroscopy , sulfone , polyamide , copolymer , maleic anhydride , fracture toughness , composite material , grafting , fracture mechanics , polymer , fracture (geology) , polymer chemistry , chemical engineering , engineering
It is shown that a fracture test using an asymmetric double cantilever beam test geometry is a powerful tool to study the effect of interfacial reactions on the improvement of the interfacial fracture toughness ( G c ) of immiscible polymer systems. The G c values between a partially aromatic polyamide (PA) and a poly(arylether sulfone) (PSU) can be increased significantly when reactive PSUs are used which are obtained by grafting with maleic anhydride by introducing pyromellitic anhydride end‐groups or by introducing carboxylic acid groups via copolymerization. Optical and atomic force microscopy investigations of the fracture surfaces show different failure mechanisms for weak and strong interfaces. For weak interfaces it was possible to determine the crack opening geometry using interference microscopy. For significantly reinforced interfaces rib marking lines on the PSU fracture surface can be observed. X‐ray photoelectron spectroscopy (XPS) measurements reveal that with increasing toughness of the interface more and more cohesive failure of the PA occurs. This results in an increasing amount of nitrogen detected on the PSU fracture surface and simultaneously no sulfur is detected on the PA fracture surface. © 1997 John Wiley & Sons, Inc. J Appl Polm Sci 65: 567–579, 1997