| 摘要 |
<p>A polybutadiene in which the values of e, f, and g calculated from the following determinant (I): (I)[wherein symbol a is a peak value at around 1,130 cmin a transmittance spectrum obtained by Fourier transfer-infrared spectroscopy, b is a trough value at around 967 cmin the spectrum, c is a trough value at around 911 cmin the spectrum, and d is a trough value at around 736 cmin the spectrum]satisfy the relationship (II): (calculated value of cis-1,4 bond amount) = e/(e+f+g)×100 >= 99 and the relationship (III): (calculated value of vinyl bond amount) = g/(e+f+g)×100 <= 0. With the polybutadiene, a rubber composition and a tire can be improved in wearing resistance and unsusceptibility to crack growth.</p> |
