Novel Ni and Pd(benzocyclohexan-ketonaphthylimino)(2) Complexes for Copolymerization of Norbornene with Octene

作者：Liu Yueman; Ouyang Meng; He Xiaohui^*; Chen Yiwang; Wang Kaiti

来源：Journal of Applied Polymer Science, 2013, 128(1): 216-223.

DOI：10.1002/app.38171

• catalytic polymerization
• late-transition metals complexes
• norbornene
• 1-octene
• additional polymerization

Two novel late transition metals complexes with bidentate ON chelate ligand, Mt(benzocyclohexan-ketonaphthylimino)(2) {Mt(bchkni)(2): bchkni = C10H8(O)C[N(naphthyl)CH3]; Mt Ni, Pd}, were synthesized. In the presence of B(C6F5)(3), both complexes exhibited high activity toward the homo-polymerization of norbornene (NB) (as high as 2.7 x 10(5) g(polymer)/mol(Ni.h) for Ni(bchkni)(2)/B(C6F5) 3 and 2.3 x 10(5) g(polymer)/mol(Pd.h) for Pd(bchkni)(2)/B(C6F5)(3), respectively). Additionally, both catalytic systems showed high activity toward the copolymerization of NB with 1-octene under various polymerization conditions and produced the addition-type copolymer with relatively high molecular weights (0.1-1.4 x 10(5) g/mol) as well as narrow molecular weight distribution. The 1-octene content in the copolymers can be controlled up to 8.9-14.0% for Ni(bchkni) 2/B(C6F5) 3 and 8.8-14.6% for Pd(bchkni) 2/B(C6F5) 3 catalytic system by varying comonomer feed ratios from 10 to 70 mol %. The reactivity ratios of two monomers were determined to be r(1-octene) = 0.052, r(NB) = 8.45 for Ni(bchkni)/B(C6F5)(3) system, and r(1-octene) = 0.025, r(NB) = 7.17 for Pd(bchkni)/B(C6F5)(3) system by the Kelen-TUdOs method. The achieved NB/1-octene copolymers were confirmed to be noncrystalline and exhibited good thermal stability (T-d > 400 degrees C, T-g = 244.1-272.2 degrees C) and showed good solubility in common organic solvents.

• 出版日期2013-4-5
• 单位南昌大学