Related Experiment Video
Updated: Sep 22, 2025

Particles without a Box: Brush-first Synthesis of Photodegradable PEG Star Polymers under Ambient Conditions
Published on: October 10, 2013
Synthesis and Star/Linear Topology Transformation of a Mechanically Linked ABC Terpolymer
Hiroki Sato1, Daisuke Aoki2, Toshikazu Takata2
1Department of Chemical Science and Engineering and ‡JST-CREST, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8552, Japan.
Abstract:
The synthesis of an ABC star terpolymer containing one polymer chain connected mechanically through a rotaxane linkage and its topology transformation to a linear structure are reported. Pseudo[2]rotaxane, which was designed as the key trifunctional species for the star polymer synthesis, comprised a sec-ammonium axle with ethynyl and hydroxy groups and a crown ether wheel with a trithiocarbonate group. Stepwise polymer connections to the pseudo[2]rotaxane using the three groups afforded a rotaxane-linked ABC star terpolymer. The topology transformation from star to linear by the removal of the attractive interaction between the axle and wheel components yielded a linear ABC terpolymer via the wheel shifting to the axle end. The spectroscopic and solution property changes clearly indicated the occurrence of the polymer topology change.
More Related Videos
11:17Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction
Published on: January 19, 2016
06:55Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level
Published on: September 26, 2016
Related Concept Videos
Step-Growth Polymerization: Overview
Many natural and synthetic polymers are produced by...
Polymer Classification: Architecture
Free-Radical Chain Reaction and Polymerization of Alkenes
Ziegler–Natta Chain-Growth Polymerization: Overview
Characteristics and Nomenclature of Copolymers
Polymer Classification: Stereospecificity