Related Experiment Video
Updated: Jun 27, 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
Synthesis and Optoelectronic Properties of Branched Polystyrene-graft-Polyfluorene Copolymers
Chuan Chen1, Ruoyu Jiang1,2, Changchun Liu1
1Department of Chemical Engineering and New Material, Changzhou Vocational Institute of Engineering, Changzhou 213164, China.
None:
Poly(9,9-di-n-octylfluorene) (PFO) applications are limited by green emission defects and imbalanced charge transport. To overcome this, novel branched polystyrene-graft-polyfluorene (PSt-g-PFO) copolymers with varying grafting densities were synthesized. The highly branched architecture induces intense steric hindrance, acting as a physical shield to isolate PFO emissive cores. This successfully suppresses detrimental interchain π-π stacking, mitigating the ~530 nm green emission. Furthermore, the moderately grafted PSt-g-PFO2 promotes locally ordered crystalline packing, achieving a maximum electron mobility of 6.16 × 10-6 cm2/(V·s), an order of magnitude higher than linear PFO. This structural design effectively decouples deleterious aggregation from charge transport.
More Related Videos
Related Concept Videos
Polymer Classification: Architecture
Radical Chain-Growth Polymerization: Chain Branching
Polymer Classification: Stereospecificity
Characteristics and Nomenclature of Copolymers
Types of Step-Growth Polymers: Polyesters
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the polymer...
Olefin Metathesis Polymerization: Overview
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...

