| 摘要 |
<p>The present invention relates to a butadiene/isoprene/aromatic vinyl hydrocarbon sevenblock copolymer and the process to prepare the copolymer. Said block copolymer have the following structure: Z-XZ-X-Y-X-XZ-Z, wherein Z is aromatic vinyl hydrocarbon polymer block, X and Y are selected from butadiene and isoprene polymer block, but they are different from each other, XZ is tapered copolymer block of aromatic vinyl hydrocarbon and butadiene or isoprene, aromatic vinyl hydrocarbon repeated units are 10-50 wt.% of the block copolymer, butadiene repeated units are 10-75 wt.% of the block copolymer, isoprene repeated units are 10-75 wt.% of the block copolymer.</p> |
