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Related Concept Videos

Free-Radical Chain Reaction and Polymerization of Alkenes02:35

Free-Radical Chain Reaction and Polymerization of Alkenes

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The conversion of alkenes to macromolecules called polymers is a reaction of high commercial importance. The structure of the polymer is defined by a repeating unit, while the terminal groups are considered insignificant. The average degree of polymerization represents the number of repeating units in the polymer molecule and is denoted by the subscript n.
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Olefin Metathesis Polymerization: Overview01:13

Olefin Metathesis Polymerization: Overview

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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...
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Polymer Classification: Architecture01:14

Polymer Classification: Architecture

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Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
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Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)00:53

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)

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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...
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Types of Step-Growth Polymers: Polyesters01:20

Types of Step-Growth Polymers: Polyesters

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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...
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Step-Growth Polymerization: Overview01:03

Step-Growth Polymerization: Overview

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Step-growth or condensation polymerization is a stepwise reaction of bi or multifunctional monomers to form long-chain polymers. As all the monomers are reactive, most of the monomers are consumed at the early stages of the reaction to form small chains of reactive oligomers, which then combine to form long polymer chains in the late stages. Hence, the reaction has to proceed for a long time to achieve high molecular weight polymers.
Many natural and synthetic polymers are produced by...
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Related Experiment Video

Updated: Oct 15, 2025

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level
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Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level

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Crosslinked Fluorinated Poly(arylene ether)s with POSS: Synthesis and Conversion to High-Performance Polymers.

Yashu He1, Jingting Wang1, Igor S Sirotin2

  • 1Key Laboratory of High Performance Plastics, Ministry of Education, National & Local Joint Engineering Laboratory for Synthesis Technology of High Performance Polymer, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China.

Polymers
|October 23, 2021
PubMed
Summary

New poly(arylene ether)s incorporating POSS exhibit excellent processability and form a crosslinked network with desirable dielectric, chemical resistance, and thermal properties for advanced applications.

Keywords:
POSScrosslinked poly(arylene ether)shigh-performance polymers

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Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
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The Preparation and Properties of Thermo-reversibly Cross-linked Rubber Via Diels-Alder Chemistry
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The Preparation and Properties of Thermo-reversibly Cross-linked Rubber Via Diels-Alder Chemistry

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Related Experiment Videos

Last Updated: Oct 15, 2025

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level
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Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level

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Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
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The Preparation and Properties of Thermo-reversibly Cross-linked Rubber Via Diels-Alder Chemistry
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The Preparation and Properties of Thermo-reversibly Cross-linked Rubber Via Diels-Alder Chemistry

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Nanotechnology

Background:

  • Poly(arylene ether)s are a versatile class of polymers known for their thermal stability.
  • Incorporating polyhedral oligomeric silsesquioxane (POSS) into polymer backbones can enhance material properties.
  • Fluorinated polymers often exhibit unique dielectric and hydrophobic characteristics.

Purpose of the Study:

  • To synthesize novel crosslinked poly(arylene ether)s containing POSS in the main chain.
  • To investigate the properties of these polymers, focusing on their dielectric behavior, chemical resistance, and thermal stability.
  • To evaluate their potential for applications requiring advanced material performance.

Main Methods:

  • Synthesis of fluorinated poly(arylene ether)s via nucleophilic substitution reactions using diphenol POSS and decafluorinated monomers (decafluorobiphenyl, decafluorobenzophenone, decafluorodiphenyl sulfone).
  • End-capping of the polymers with 3-hydroxyphenyl acetylene to introduce phenylacetylene groups.
  • Thermal treatment to induce crosslinking of the phenylacetylene-terminated polymers.
  • Characterization of the crosslinked network's dielectric constant, dielectric loss, chemical resistance, and thermal properties.

Main Results:

  • Successfully synthesized phenylacetylene-terminated poly(arylene ether)s with POSS in the main chain.
  • The polymers demonstrated excellent processability prior to crosslinking.
  • Upon heating, the polymers formed a crosslinked network with a low dielectric constant (2.17–2.58 at 1 MHz).
  • The crosslinked materials exhibited strong resistance to chemical solutions, low dielectric losses, good thermal stability, and hydrophobic properties.

Conclusions:

  • The developed poly(arylene ether)s with integrated POSS offer a promising combination of processability and high-performance characteristics after crosslinking.
  • The low dielectric constant and excellent chemical resistance make these materials suitable for microelectronics and advanced coatings.
  • The study highlights the effectiveness of incorporating POSS and phenylacetylene groups for creating high-performance crosslinked polymers.