The effect of glass fibers on the resistance to slow crack growth in polypropylene molded pieces
Polimery 2002, No 1, 54
Slow crack growth was studied in molded pieces of virgin Malen P J-400 and of glass fiber-reinforced (10 %) Malen P J-400 polypropylene (PP) (Xenopren PPGF10-CC composite). The Xenopren PPGF10-CC composite samples were examined for 264—1104 h and showed a reduced resistance (Table 2, Fig. 8). The virgin PP samples did not crack in 1000 h, presumably because the stress cracks propagating along the load axis (cf. ) augmented the tendency to plastic deformation and prevented the fracture.
Keywords: polypropylene, glass fiber, molded pieces, slow crack growth, load axis