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Related Concept Videos

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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Free-Radical Chain Reaction and Polymerization of Alkenes02:35

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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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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: 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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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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Polymer Classification: Stereospecificity01:26

Polymer Classification: Stereospecificity

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Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
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Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites
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Small molecule organic eutectics as candidates to replace plastics.

Joshua L Ryan1, Gabriele C Sosso1, Stefan A F Bon1

  • 1Department of Chemistry, The University of Warwick Coventry CV4 7AL UK https://bonlab.info s.bon@warwick.ac.uk g.sosso@warwick.ac.uk.

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Summary
This summary is machine-generated.

Eutectic molecular liquids and glasses offer sustainable alternatives to polymers. These materials demonstrate excellent long-term stability and tunable properties for various product applications.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Physical Chemistry

Background:

  • Increasing regulatory and consumer pressure necessitates alternatives to traditional polymers.
  • Eutectic molecular liquids and glasses are underutilized materials with potential for replacing polymers.
  • Developing stable, processable, and tunable materials is crucial for new product formulations.

Purpose of the Study:

  • To formulate and characterize hydrophobic eutectic molecular liquids and glasses.
  • To assess the long-term physical stability and processability of these amorphous materials.
  • To explore their potential as matrices for controlled active ingredient release.

Main Methods:

  • Formulation of hydrophobic eutectic mixtures from crystalline components.
  • Determination of eutectic composition using differential scanning calorimetry (DSC) and UV-vis spectroscopy, analyzed with partial least squares regression.
  • Assessment of long-term amorphous stability via powder X-ray diffraction (PXRD).
  • Investigation of rheological properties and molecular dynamics (MD) simulations for processability and physical stability insights.

Main Results:

  • Successful formulation of hydrophobic eutectic molecular liquids and glasses.
  • Demonstrated long-term stability (up to 14 months) against crystallization.
  • Identified low fragility indices, indicating good processability for applications like glassblowing and film formation.
  • Showcased tunable properties through blending and plasticizer addition.
  • Validated potential application in controlled release systems using a specific eutectic matrix.

Conclusions:

  • Eutectic molecular liquids and glasses are viable, stable, and processable alternatives to polymers.
  • Their properties can be tailored for specific applications through formulation.
  • These materials hold promise for sustainable product development and controlled release technologies.