| abstract |
The invention discloses a modified EPDM rubber and a preparation method thereof. This modified EPDM rubber is prepared by grafting and modifying EPDM rubber with Nadic anhydride of structure shown in formula (1), based on the weight of the modified EPDM rubber, the The graft ratio of the modified EPDM rubber is 0.4-3.5% by weight. The preparation method of this modified EPDM rubber comprises: under the ring-opening cross-metathesis reaction condition of olefin, in the presence of the catalyst of the structure shown in formula (2), EPDM rubber and nadic acid anhydride are mixed in an organic solvent in contact. The preparation method of the modified EPDM rubber provided by the invention has the advantages of high grafting rate, quick reaction, and simple and easy steps, and the modified EPDM rubber provided by the invention is the same as the unmodified EPDM Compared with ethylene-propylene rubber, the degree of unsaturation is 0.44-0.68mol/kg, and the vulcanization speed is improved to a certain extent. |