POLYBUTADIENE AND RUBBER COMPOSITION AND TIRE BOTH CONTAINING THE SAME

摘要

This invention provides a polybutadiene capable of improving wear resistance and resistance to crack growth in a rubber composition and a tire, wherein values of e, f and g derived from the following determinant (I): 1.7455 0 - 0.0151 - 0.0454 0.4292 - 0.0129 - 0.007 0 0.3746 log 10 a / d log 10 a / b log 10 a / c = e f g (wherein a is a mountain peak value around 1130 cm -1 in a transmittance spectrum through Fourier transform infrared spectroscopy (FT-IR), and b is a valley peak value around 967 cm -1 , and c is a valley peak value around 911 cm -1 , and d is a valley peak value around 736 cm -1 ) satisfy relationships of equation (II): (Calculated value of cis-1,4 bond) = e/(e+f+g)x100 ‰¥ 99 and equation (III): Calculated value of vinyl bond = g / e + f + g �¢ x 100 ‰¤ 0.