| abstract |
a conjugated diene-based polymer, a conjugated diene-based polymer composition and a tire are provided, which satisfy the requirements of (1) to (4) below: (1) there are two or more peaks in a distribution curve molecular weight obtained through gel permeation chromatography (gpc); (2) on the molecular weight distribution curve, there is a peak (a) having a maximum molecular weight of 500,000 to 2,500,000 and a peak (b) having a maximum molecular weight of 150,000 to 600,000; (3) the sum of the peak area (a) and the peak area (b) constitutes at least 70% of the total area of the molecular weight distribution curve; and (4) the absolute value of the difference between the glass transition temperature (tg (a)) of the conjugated diene-based polymer included in the peak (a) and the glass transition temperature (tg (b)) of the polymer based of diene included in peak (b) is 2 ° c to 30 ° c. |