| 1 | Latex, a material obtained from rubber trees, is a natural polymer of isoprene. | |
| 2 | Isoprene needs to be extremely pure to make synthetic rubber. | |
| 3 | Latex, a material obtained from rubber trees, is a natural polymer of isoprene. | |
| 4 | A synthetic elastomer produced by catalytic copolymerization of isobutene with no more than 3% of isoprene; | |
| 5 | The invention adds a newcomer for synthesizing high-performance polyisoprene by catalysis of rare earth catalyst in the prior art. |