One-step Synthesis of End-Functionalized Hydrogenated Nitrile-Butadiene Rubber by Combining the Functional Metathesis with Hydrogenation |
| |
| Authors: | Juan Liu Jingyu Sun Zhengguo Zhang Hui Yang Xiaojuan Nie |
| |
| Institution: | 1. School of science, North University of China, Jiancaoping District of Taiyuan City, Shanxi Province, China;2. Jinjiao high-tech (Shanghai) co. LTD, Jianchuan Road Cangyuan Technology Park, Shanghai, China;3. Beijing Advanced Innovation Center for Soft Matter science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 China |
| |
| Abstract: | End-functionalized hydrogenated polymers obtained from nitrile-butadiene rubber (NBR) yield new materials with suitable properties for a number of applications as sealing material and adhesives. We investigated the one-step synthesis of ester end-functionalized hydrogenated nitrile-butadiene rubber (EF-HNBR) by combining the functional metathesis with the hydrogenation of NBR in the presence of the 2nd generation Grubbs catalyst and a functionalized olefin as a chain transfer agent (CTA). We established the operating conditions for the effective production of saturated functional polymers with a high degree of hydrogenation, high chemo-selectivity and moderate molecular weight. The structures of the products were confirmed by FT-IR and 1H-NMR spectroscopy, rubber molecular weight, and distribution determined by using gel permeation chromatography (GPC); their thermal properties were determined by thermo-gravimetric analysis (TGA) and different scanning calorimetry (DSC). |
| |
| Keywords: | nitrile-butadiene rubber functional metathesis hydrogenation reactions end-functionalized saturated polymers one-step synthesis |
|
|
