高分子物質の衝撃破壊

抄録

To elucidate the mechanism of high speed tensile fracture of polymeric substances the fracture energy, W, is compared with the integrated loss tangent, L, obtained by integrating the loss tangent from 0°K to the temperature at which W was measured.
W was determined by the oscillograph of flywheel type high speed tensile tester (testing speed 5m/sec).
W is almost proportional to L for ten straight polymers except polycarbonate (PC), while the increase of W is more marked than that of L and the proportionality does not hold for PC and the blend polymers of polyvinylchloride with impact-resisting material, i.e., methyl methacrylate-butadiene-styrene graft copolymer.