Hua Shi-ying, TANG Xue-ming. SYNTHESIS OF CIS-1, 4-POLYBUTADIENE WITH CATALYST——Ⅴ. STUDY OF THE VALENCE STATE OF THE ACTIVE CENTER[J]. Acta Polymerica Sinica, 1982,(5):331-337.
Hua Shi-ying, TANG Xue-ming. SYNTHESIS OF CIS-1, 4-POLYBUTADIENE WITH CATALYST——Ⅴ. STUDY OF THE VALENCE STATE OF THE ACTIVE CENTER[J]. Acta Polymerica Sinica, 1982,(5):331-337.DOI:
The valence state of the active center of the nickel catalytic system in the synthesis of cis-polybutadiene has been studied by ESR. It was found that Ni0 and Ni+ always coexist with each other during the course of polymerization.