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Citation: Zhang Xitian, Pei Fengkui, Jiao Shuke, Hu Liping. ¹³C-NMR STUDY ON THE LIQUID POLYBUTADIENE SYNTHESIZED BY COBALT BASED CATALYST SYSTEMEND GROUP, BRANCHED STRUCTURE AND MODIFICATION MECHANISM BY α-OLEFINE[J]. Chinese Journal of Applied Chemistry, ;1986, 3(5): 69-74. shu

¹³C-NMR STUDY ON THE LIQUID POLYBUTADIENE SYNTHESIZED BY COBALT BASED CATALYST SYSTEMEND GROUP, BRANCHED STRUCTURE AND MODIFICATION MECHANISM BY α-OLEFINE

1.
1. Changchun Institute of Applied Chemistry, Academia Sinica;
2.
2. Department of Applied Chemistry, Beijing Institute of Chemical Technology

Received Date: 10 April 1985
Available Online: 30 October 1985

With the aid of ¹³C-NMR spectra of liquid polyoutadiene(PB), catalytically synthesized by Co(Nap)₂-Al(i-Bu)₃ -PhCCl₃, some terminal structures of PB Ⅰ-Ⅵ and two branch structures ⅩⅥ and ⅩⅦ have been identified, providing valuable information for chain initiation mechanism. On the basis of branch structure the number average molecular weight of samples was calculated and compared with the result obtained from VPO measurement.The ¹³C NMR spectra of PB modified by α-olefine reveal that α-ole-fine only modifies the molecular weight of the polymer, it does not copolymerize with butadiene.
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13C-NMR STUDY ON THE LIQUID POLYBUTADIENE SYNTHESIZED BY COBALT BASED CATALYST SYSTEMEND GROUP, BRANCHED STRUCTURE AND MODIFICATION MECHANISM BY α-OLEFINE

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¹³C-NMR STUDY ON THE LIQUID POLYBUTADIENE SYNTHESIZED BY COBALT BASED CATALYST SYSTEMEND GROUP, BRANCHED STRUCTURE AND MODIFICATION MECHANISM BY α-OLEFINE