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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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The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...

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Updated: Mar 1, 2026

Author Spotlight: Quantitative Characterization of Liquid Photosensitive Bioink Properties for Continuous Digital Light Processing Based Printing

Author Spotlight: Quantitative Characterization of Liquid Photosensitive Bioink Properties for Continuous Digital Light Processing Based Printing

Published on: April 14, 2023

Printable and Rewritable Full Block Copolymer Structural Color.

Han Sol Kang¹, Jinseong Lee¹, Suk Man Cho¹

¹Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 120-749, Republic of Korea.

Advanced Materials (Deerfield Beach, Fla.)

|May 31, 2017

Summary

This summary is machine-generated.

Researchers developed a rewritable structural color display using block copolymer photonic crystals. This ink-jet printable technology allows for repeated writing and erasing of full-color images and text.

Keywords:

ammonium persulfate block copolymers full-colored photonic crystals ink-jet printing printable structural color reversible crosslinking rewritable structural color

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Fabricating Reactive Surfaces with Brush-like and Crosslinked Films of Azlactone-Functionalized Block Co-Polymers

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Published on: June 30, 2018

Area of Science:

Materials Science
Optics
Nanotechnology

Background:

Structural colors (SCs) in photonic crystals (PCs) are generated by light interference.
Existing SC displays often lack rewritability and high resolution.

Purpose of the Study:

To demonstrate an ink-jet printable and rewritable block copolymer (BCP) structural color display.
To achieve high-resolution color display with repeatable writing and erasing capabilities.

Main Methods:

Utilizing a modified ink-jet printer for controlled deposition of a water-based ink with a reversible crosslinking agent.
Employing a self-assembled BCP PC film with a 1D stack of alternating layers.
Inducing differential swelling of the BCP film to create structural colors.

Main Results:

Achieved a rewritable SC display with over 50 writing/erasing cycles.
Demonstrated resolution comparable to commercial ink-jet printers.
Successfully displayed full-colored characters and images.
Enabled chemical erasing and resetting using hydrogen bromide.

Conclusions:

Developed a novel, chemically rewritable BCP SC display technology.
This ink-jet printable system offers a promising platform for reusable color displays.
The method allows for precise control over color generation through differential swelling.