TY - JOUR
T1 - Interlaminar morphology effects on fracture resistance of amorphous polymer-modified epoxy/carbon fibre composites
AU - Woo, E. M.
AU - Mao, K. L.
N1 - Funding Information:
administered by National Science Council (NSC). The authors are grateful to the NSC for the provision of research grant #NSC 852216-E006-009. They also thank Professor F. C. Chang of National Chiao Tung University (Hsinchu, Taiwan) for the kind donation of the phenoxy sample.
PY - 1996
Y1 - 1996
N2 - Effects of three amorphous thermoplastic polymers used as interlaminar toughening particles in carbon fibre/epoxy laminated composites have been compared. Mode I and mode II delamination fracture toughness were characterized using double cantilever beam and end-notched flexure specimens, respectively, and the delaminated surfaces of specimens were examined using scanning electron microscopy to investigate the interlaminar morphology after fracture. This study showed that the poly(ether imide)-modified and phenoxy-modified systems exhibited similar improvement. The interlaminar morphology in these two systems is compared and discussed. Surprisingly, incorporation of bisphenol-A polycarbonate (PC), with its solvent-induced crystallinity during particulate preparation, induced only very little improvement in the modified composite system. The microstructural morphology at the PC/epoxy interlaminar region showed insoluble chunks of PC domains with crystals, the brittleness and lack of wetting with the epoxy phase adversely affected the macroscopic mechanical fracture behaviour.
AB - Effects of three amorphous thermoplastic polymers used as interlaminar toughening particles in carbon fibre/epoxy laminated composites have been compared. Mode I and mode II delamination fracture toughness were characterized using double cantilever beam and end-notched flexure specimens, respectively, and the delaminated surfaces of specimens were examined using scanning electron microscopy to investigate the interlaminar morphology after fracture. This study showed that the poly(ether imide)-modified and phenoxy-modified systems exhibited similar improvement. The interlaminar morphology in these two systems is compared and discussed. Surprisingly, incorporation of bisphenol-A polycarbonate (PC), with its solvent-induced crystallinity during particulate preparation, induced only very little improvement in the modified composite system. The microstructural morphology at the PC/epoxy interlaminar region showed insoluble chunks of PC domains with crystals, the brittleness and lack of wetting with the epoxy phase adversely affected the macroscopic mechanical fracture behaviour.
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U2 - 10.1016/1359-835X(96)00028-0
DO - 10.1016/1359-835X(96)00028-0
M3 - Article
AN - SCOPUS:0029697243
VL - 27
SP - 625
EP - 631
JO - Composites - Part A: Applied Science and Manufacturing
JF - Composites - Part A: Applied Science and Manufacturing
SN - 1359-835X
IS - 8 PART A
ER -