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Characteristics and Nomenclature of Copolymers

Characteristics and Nomenclature of Copolymers

Copolymers are the products obtained from the polymerization of multiple monomer species. So, in a polymer chain itself, there can be multiple repeating units that come from different monomers. The process of synthesizing a polymer from different monomer species is called copolymerization. When two monomers are involved, the polymer is known as a bipolymer. Polymers with three and four monomers are termed terpolymers and quaterpolymers, respectively. Figure 1 depicts the copolymerization of...

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Updated: Sep 8, 2025

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Synthesis of Monodisperse Cylindrical Nanoparticles via Crystallization-driven Self-assembly of Biodegradable Block Copolymers

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Disordered Inverse Photonic Beads Assembled From Linear Block Copolymers.

Juyoung Lee¹, Hyeong Seok Oh¹, Soohyun Ban¹

¹School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology, Ulju-gun, UNIST-gil 50, Ulsan, 44919, Republic of Korea.

Angewandte Chemie (International Ed. in English)

|September 6, 2025

Summary

This summary is machine-generated.

Researchers developed a new method for creating photonic pigments using linear block copolymers. This scalable technique produces angle-independent structural color, offering a sustainable alternative to traditional dyes.

Keywords:

Block copolymers Inverse photonic glass Photonic pigments Self‐assembly Structure color

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Published on: June 8, 2016

Area of Science:

Materials Science
Polymer Chemistry
Nanotechnology

Background:

Structurally colored colloids (photonic pigments) offer sustainable alternatives to dyes.
Current methods often yield limited morphologies and require complex synthesis.
Achieving angle-independent color typically relies on disordered inverse architectures from demanding bottlebrush block copolymers (BCPs).

Purpose of the Study:

To develop a novel, scalable strategy for assembling three-dimensional inverse photonic glass microparticles.
To utilize amphiphilic linear BCPs for creating photonic pigments with tunable properties.
To establish a modular platform for structurally and chemically programmable photonic pigments.

Main Methods:

Emulsion-templated assembly of amphiphilic linear BCPs (PS-b-P4VP).
Use of trans-1,2-dichloroethylene to induce interfacial water infiltration and form nanoscale aqueous domains.
Evaporative solidification to arrest short-range-ordered pore structures into photonic beads.
Systematic variation of surfactant alkyl chain length and BCP molecular weight.
Post-chemical modification (quaternization of P4VP) for property modulation.

Main Results:

Successful assembly of 3D inverse photonic glass microparticles with angle-independent color.
Demonstrated precise control over pore size, shell thickness, and optical output by tuning synthesis parameters.
Showcased orthogonal chemical tunability of photonic behavior via P4VP quaternization.
Achieved short-range-ordered pore structures directing the photonic properties.

Conclusions:

Established a conceptually distinct and scalable strategy for photonic pigment production.
Expanded the self-assembly capabilities of linear BCPs for photonic applications.
Created a modular platform for producing structurally and chemically programmable photonic pigments.