Sumitomo Chemical Company, Limited

Zs Elastomers Co., Ltd.

Seon Corporation

Jesus Rodriguez Castanon

Hisakatsu Hama

Toshiro Matsuo

Yosuke Miyazaki

Hiroshi Aoshima

Masako Imai

A conjugated diene copolymer has a covalent bond reversibly dissociated and added by heat, and has at least two peaks in each of curves of molecular weight distributions measured at 40° C. and 60° C. by gel permeation chromatography, wherein a change rate of the proportion of the area of the peak having the lowest molecular weight in measurement at 60° C. to the proportion of the area of the peak having the lowest molecular weight in measurement at 40° C.

Conjugated diene copolymer and method for manufacturing conjugated diene copolymer

The conjugated diene-based polymer of the invention comprises an aromatic vinyl unit based on an aromatic vinyl compound and a conjugated diene unit based on a conjugated diene compound, is modified with a compound containing a heteroatom, and has an SP value of 16.80 MPato 17.10 MPa.

Conjugated diene-based polymer, conjugated diene-based polymer composition, and method for producing conjugated diene-based polymer

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Ichihara, Japan

Jesus Rodriguez Castanon