| 摘要 |
A PROCESS IS DESCRIBED FOR THE PREPARATION OF ETHYLENE COPOLYMERS HAVING A WIDE MOLECULAR WEIGHT DISTRIBUTION, CHARACTERIZED IN THAT IT IS CARRIED OUT IN THE PRESENCE OF MESO- AND RAC- STEREOISOMERIC MIXTURES OF METALLOCENE COMPOUNDS HAVING GENERAL FORMULA (I) WHERE A' AND A", THE SAME OR DIFFERENT, ARE A RADICAL OF THE N5- TETRAHYDROINDENYL TYPE (IA):
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