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Related Concept Videos

Polymers02:34

Polymers

35.7K
The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
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Radical Chain-Growth Polymerization: Chain Branching01:17

Radical Chain-Growth Polymerization: Chain Branching

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The skeletal structure of polymers synthesized via radical polymerization is always branched. For example, the polymerization of ethylene by radical polymerization results in a low-density grade of polyethylene with a heavily branched skeletal structure. Here, the radical site abstracts hydrogen from the growing chain, and the radical site shifts from the end (a primary carbon center) to anywhere within the growing chain (a secondary carbon center). Consequently, the part of the chain from the...
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Cationic Chain-Growth Polymerization: Mechanism00:57

Cationic Chain-Growth Polymerization: Mechanism

2.3K
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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Ziegler–Natta Chain-Growth Polymerization: Overview01:17

Ziegler–Natta Chain-Growth Polymerization: Overview

3.2K
Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta...
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Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
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The Hamilton Receptor in Supramolecular Polymer Sciences.

Shafieq Ahmad Wagay1, Rashid Ali2

  • 1Organic and Supramolecular Functional Materials Research Laboratory, Department of Chemistry, Jamia Millia Islamia, Okhla, New Delhi, 110025, India.

Topics in Current Chemistry (Cham)
|July 20, 2024
PubMed
Summary

This review details Hamilton-based supramolecular polymers, highlighting their molecular recognition capabilities and diverse applications. It explores the future potential of these advanced polymeric materials in supramolecular chemistry.

Keywords:
Barbituric acidDendrimersHamilton receptorPolymersRotaxanesSelf-assemblies

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Area of Science:

  • Supramolecular Chemistry
  • Polymer Science

Background:

  • Supramolecular polymers utilize reversible non-covalent interactions for material assembly.
  • Hamilton receptors are a key component in designing sophisticated supramolecular systems.

Purpose of the Study:

  • To provide a comprehensive review of Hamilton-based supramolecular polymers.
  • To highlight molecular recognition achievements and potential applications.
  • To discuss future prospects in this emerging field.

Main Methods:

  • Review of existing literature on Hamilton receptors and supramolecular polymers.
  • Analysis of applications in areas like dendrimers, rotaxanes, and self-assemblies.
  • Exploration of historical context and future directions.

Main Results:

  • Detailed exposition of polymeric Hamilton receptors, a novel approach.
  • Identification of diverse applications across various scientific domains.
  • Emphasis on the significance of these receptors in modern chemistry.

Conclusions:

  • This review is the first to extensively cover polymeric Hamilton receptors.
  • It aims to inspire further research and development in supramolecular chemistry.
  • Hamilton-based supramolecular polymers hold significant promise for future technological advancements.