| Calculation of cyclization degree and incorporated solvent content of cyclized SBR by 1H-NMR |
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| DOI： |
| Key Words: cyclized SBR；1H-NMR；cyclization degree；incorporated solvent content |
| Author Name | Affiliation | | WANG Chao-yang | South China University of Technology | | HUANG Xue-pin | South China University of Technology | | YANG Ji-hua | Changchun Institute of Applied Chemistry |
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| Abstract: |
| 1H-NMR spectra of cyclized SBR was analysed and the equations to calculate the cyclization degree and the incorporated solvent content by 1H-NMR method were derived.The total butadiene content in cyclized SBR(x)=(B+C+D-2A)/7.1，the uncyclized butadiene content(Y)=B/2+C/4，the incorporated dimethyl benzene content(Z)=(17.5A-B-C-D)/46.5，the cyclization degree(P)=1-Y/X and the incorporated solvent content(W)=91.6Z/X，if the peak densities at the 7.0，5.4，4.9 and 3.0～0 chemical shifts in 1H-NMR spectra of cyclized SBR were A，B，C and D respectively. |
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