|
|||||
|
|
First FT-Raman and H NMR comparative investigations in ring opening metathesis polymerization |
|
| Authors: | Fu Ding Renata Drozdzak Valerian Dragutan Enjun Gao Francis Verpoort |
| Institution: | a Department of Inorganic and Physical Chemistry, Ghent University, Krijgslaan 281 (S3), B-9000 Ghent, Belgium b Institute of Organic Chemistry of the Romanian Academy, Bucharest, Romania c Shenyang Institute of Chemical Engineering, Laboratory of Coordination Chemistry, Shenyang, Peoples’ Republic of China |
| Abstract: | Kinetics of ring-opening metathesis polymerization (ROMP) of exo,exo-5,6-di(methoxycarbonyl)-7-oxabicyclo2.2.1]hept-2-ene, promoted by the Grubbs’ 1st generation precatalyst, has been effectively monitored by FT-Raman and NMR spectroscopy. Both techniques evidenced similar monomer conversions to be attained under the same reaction conditions. The present FT-Raman study provided information on the polymer steric configuration, the Raman bands at 1670 and 1677 cm−1 being specifically assigned to stretching vibrations of double bonds from the cis- and trans-polymer, respectively. The trans/cis ratio observed by FT-Raman parallels the corresponding result from 1H NMR. For the first time, a comparison was made on application of these complementary methods on the same ROMP reaction, evidencing their assets and disadvantages and reliability of FT-Raman. |
| Keywords: | FT-Raman Ring-opening metathesis polymerization H NMR Kinetics Oxa-norbornenes |
| 本文献已被 ScienceDirect 等数据库收录！ | |