1332 M C. Paira et al. Carbon 38(2000)1323-1337 Single filament tensile test data for the circular fibres No. fibres Diameter(um) Tensile strength(GPa) ±S.D 95% confidence interval 2.01±0.18 9.6±1.3 1.96±0.14 P120J(MDS) P120J 9.2±1.2 02 P120J 75 W/10 min 8.9±1.1 P120J 1.97±0.26 100 W/3 min 9.3±1.3 P120J 18 1.93±0.30 150 W/3 min 8.8±1.4 1.66±0.23 P120J 1.98±0.26 150w/10m 8.2±1.2 2.04±0.19 00±0.39 P75S 18 1.94±0.16 11.0±1.0 1.63±0.09 1.53±0.13 1.38±0.16 2.1 C320 32 2.67±0.22 2.86±0.18 C320(MDS) 8±0.5 2.91±0.20 2.90±0.22 2.59±0.16 Measured on impregnated strand tensile test data for the ribbon fibres No. fibres Cross section Tensile strength(GPa) area(um) 95% confidence interval Ribbon 2.73±0.23 2.26±0. 2.09±0.25 2.44±0.1 Ribbon 2.39±0.22 75 W/3 min 34±36 2.21±0.21 2.41±0.21332 M.C. Paiva et al. / Carbon 38 (2000) 1323 –1337 Table 6 Single filament tensile test data for the circular fibres Sample No. fibres Diameter (mm) Gauge Tensile strength (GPa) tested 6S.D. length (mm) 695% confidence interval P120J 38 6 2.0160.18 61 9.661.3 10 1.9660.14 22 16 1.8660.22 43 21 1.9660.20 a b P120J (MDS) – 10 – 2.37 P120J 25 10 1.9760.29 75 W/3 min 30 9.261.2 15 1.9160.22 28 20 1.6260.21 P120J 23 10 2.2060.23 75 W/10 min 24 8.961.1 15 1.9760.22 23 20 1.8760.23 P120J 24 10 1.9760.26 100 W/3 min 24 9.361.3 15 1.8660.23 23 30 1.5360.23 P120J 18 10 1.9360.30 150 W/3 min 21 8.861.4 15 1.7060.19 25 21 1.6660.23 22 40 1.4960.19 P120J 24 10 1.9860.26 150 W/10 min 28 8.261.2 20 2.0460.19 21 41 2.0060.39 P75S 18 10 1.9460.16 23 11.061.0 21 1.6360.09 20 41 1.5360.13 19 80 1.3860.16 b P75S (MDS) – 10 – 2.1 C320 31 20 2.8860.23 32 7.860.5 30 2.6760.22 31 40 2.8660.18 C320 (MDS) – 7 – 3 C320 19 15 2.9460.18 75 W/3 min 19 7.860.5 20 2.9160.20 20 30 2.9060.22 21 41 2.5960.16 a MDS, Manufacturer’s Data Sheet. b Measured on impregnated strand. Table 7 Single filament tensile test data for the ribbon fibres Sample No. fibres Cross section Gauge length Tensile strength (GPa) 2 tested area (mm ) (mm) 695% confidence interval Ribbon 40 10 2.7360.23 45 320642 25 2.2660.22 41 35 2.0960.25 44 45 2.4460.18 Ribbon 26 10 2.3960.22 75 W/3 min 27 334636 15 2.2160.21 30 30 2.4160.23