were mixed and melt kneaded for 4 minutes at a screw rotation speed of 2000 rpm the obtained blends were crushed and then thermo pressed at 200 u00b0 c to obtain sheets the obtained blend compositions had mwcnt grains dispersed microscopically in a sbbs matrix also the obtained sheets were confirmed to have a glossy surface of excellent properties fig1 shows the stress vs strain curves of molded resin products produced with different mwcnt contents by weight in example 2 as evident from this figure nano dispersing mwcnt at the screw rotation speed of 2000 rpm still resulted in the elongation at break being a mechanical performance property of the produced sample decreasing along with the mwcnt content on the other hand the modulus of elasticity increased in direct proportion to the mwcnt content refer to table 2 fig1 shows the results of samples a comprising sbbs alone b containing 1 5 percent by weight of mwcnt c containing 3 0 percent by weight of mwcnt and d containing 6 0 percent by weight of mwcnt as evident from table 2 nano dispersing mwcnt at the screw rotation speed of 2000 rpm had the effect of decreasing the elongation at break being a mechanical performance property of the produced sample along with the mwcnt content while increasing the modulus of elasticity in direct proportion to the mwcnt content also while the breaking strength increased straight to 26 81 mpa when a small amount 1 5 of mwcnt was added the breaking strength decreased thereafter along with the mwcnt content and became roughly the same as.