Related Experiment Video
Updated: Jun 1, 2026

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level
Published on: September 26, 2016
Highly Active Syndiospecific Living Polymerization of Higher 1-Alkene with ansa-Fluorenylamidodimethyltitanium
Zhengguo Cai1, Masayoshi Ohmagari, Yuushou Nakayama
1Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan.
Abstract:
1-Hexene polymerization was conducted by [t-BuNSiMe(2) (3,6-t-Bu(2) Flu)]TiMe(2) (1) using trialkylaluminum-free modified methylaluminoxane (dMMAO) as a cocatalyst in toluene. The system produced living syndiotactic poly(1-hexene) with high turnover frequency of propagation (TOF, 98 s(-1) ) at 0 °C. The propagation rate was increased linearly against the 1-hexene concentration, which indicates that the first-order dependence of the propagation rate on monomer concentration. Polymerizations of 1-octene, 1-decene and 1-dodecene were also conducted for investigating the effect of chain length of 1-alkene on propagation rate by means of the livingness of this system. The propagation rate decreased according to the chain length until 1-decene but almost unchanged in longer 1-alkene: TOF, 1-octene (62 s(-1) )>1-decene (32 s(-1) ) ≈ 1-dodecene (31 s(-1) ).
Related Concept Videos
Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
Anionic Chain-Growth Polymerization: Overview
Anionic Chain-Growth Polymerization: Mechanism
Olefin Metathesis Polymerization: Overview
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...
Ziegler–Natta Chain-Growth Polymerization: Overview
Cationic Chain-Growth Polymerization: Mechanism

