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Related Concept Videos

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)00:53

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)

Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
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: Overview01:20

Anionic Chain-Growth Polymerization: Overview

The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)01:16

Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)

Ring-opening metathesis polymerization or ROMP involves strained cycloalkenes as starting materials. The mechanism of ROMP proceeds by reacting cycloalkene with Grubbs catalyst to give metallacyclobutane intermediate which undergoes a ring-opening reaction to form new carbene. The new carbene reacts with another molecule of cycloalkene. Repetition of these steps leads to the formation of an unsaturated open-chain polymer product. All these steps are reversible, however, relieving the ring...
Olefin Metathesis Polymerization: Overview01:13

Olefin Metathesis Polymerization: Overview

Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...
Types of Step-Growth Polymers: Polyesters01:20

Types of Step-Growth Polymers: Polyesters

The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
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...

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Related Experiment Video

Updated: Jun 16, 2026

Microwave-assisted Functionalization of Poly(ethylene glycol) and On-resin Peptides for Use in Chain Polymerizations and Hydrogel Formation
15:33

Microwave-assisted Functionalization of Poly(ethylene glycol) and On-resin Peptides for Use in Chain Polymerizations and Hydrogel Formation

Published on: October 29, 2013

Catechol-grafted poly(ethylene glycol) for PEGylation on versatile substrates.

Hyukjin Lee1, Kang Dae Lee, Kyung Bo Pyo

  • 1Department of Chemistry, Graduate School of Nanoscience & Nanotechonology, Molecular-level Interface Research Center, KAIST, Republic of Korea.

Langmuir : the ACS Journal of Surfaces and Colloids
|February 13, 2010
PubMed
Summary

We developed a new polymer, poly(ethylene) glycol-grafted-catechol (PEG-g-catechol), to create surfaces that resist fouling. This versatile material easily coats various surfaces, offering broad applications in materials science.

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Microwave-assisted Functionalization of Poly(ethylene glycol) and On-resin Peptides for Use in Chain Polymerizations and Hydrogel Formation
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10:53

Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions

Published on: October 10, 2016

Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Surface Chemistry

Background:

  • Developing nonfouling surfaces is crucial for preventing unwanted material adhesion.
  • Existing methods for surface modification, especially on challenging polymers, often face limitations.
  • Poly(ethylene) glycol (PEG) is known for its nonfouling properties, but its application to diverse surfaces can be difficult.

Purpose of the Study:

  • To synthesize and characterize a novel catechol-grafted poly(ethylene) glycol (PEG-g-catechol) for robust surface modification.
  • To demonstrate the facile and versatile application of PEG-g-catechol onto a wide range of substrates.
  • To establish PEG-g-catechol as a new class of PEG derivatives for effective surface PEGylation.

Main Methods:

  • Step-growth polymerization was employed to conjugate dopamine, a mussel-inspired adhesive, to poly(ethylene) oxide (PEO).
  • Substrates including noble metals, oxides, and polymers like PTFE were immersed in an aqueous solution of PEG-g-catechol for surface modification.
  • Surface analysis techniques such as ellipsometry, goniometry, FTIR, and XPS were utilized to confirm successful PEGylation.

Main Results:

  • Robust surface PEGylation was achieved on diverse substrates, including adhesion-resistant polytetrafluoroethylene (PTFE).
  • The PEG-g-catechol coating demonstrated effective nonfouling properties.
  • Surface analytical techniques confirmed the successful and uniform grafting of PEG onto the substrates.

Conclusions:

  • PEG-g-catechol represents a significant advancement in surface modification, enabling easy and effective PEGylation.
  • This new class of PEG derivatives overcomes limitations of existing methods, particularly for difficult-to-modify synthetic polymer surfaces.
  • The developed material offers a versatile platform for creating nonfouling surfaces across various applications.