Halide-free neodymium phosphate based catalyst for highly cis-1,4 selective polymerization of dienes.

ABSTRACT: Neodymium-based Ziegler-Natta type catalytic systems are known to produce polydienes with high cis-1,4 content. It is generally believed that in Ziegler-Natta catalytic systems, a halide or pseudohalide, whether in the catalyst itself or a separate source, is required for the success of the polymerization. In this work, we have synthesized an unusual halide-free neodymium diethyl phosphate catalyst for diene polymerization. This neodymium complex combined with triisobutylaluminum (TIBA), formed a binary catalytic system and was used to polymerize β-myrcene. The catalytic system displays high stereospecificity and produces poly(β-myrcene) with 96% cis-1,4 content and a relatively narrow molecular weight distribution (M _w/M _n = 1.80). Also, k

SUBMITTER: Ren Y 

PROVIDER: S-EPMC9060247 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature