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Related Concept Videos

Ion Exchange01:17

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Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
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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,...
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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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Updated: Aug 7, 2025

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
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An Imidazolium-Based Ionic Liquid as a Model to Study Plasticization Effects on Cationic Polymethacrylate Films.

Thashree Marimuthu1, Zainul Sidat1, Pradeep Kumar1

  • 1Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, 7 York Road, Parktown, Johannesburg 2193, South Africa.

Polymers
|March 11, 2023
PubMed
Summary

Ionic liquids, like 1-hexyl-3-methyl imidazolium chloride ([HMIM]Cl), show superior plasticizing effects on methacrylate polymers compared to traditional agents. These novel agents offer enhanced pliability and long-term stability for biomedical applications.

Keywords:
green chemistryionic liquidsmechanical propertiesplasticizationpolymeric filmsstress/strain properties

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Biomedical Engineering

Background:

  • Ionic liquids (ILs) are explored for biomedical applications due to their environmentally friendly nature.
  • Methacrylate polymers require plasticizers to enhance flexibility and processability.
  • Current industry standards for plasticizers include glycerol and dioctyl phthalate (DOP).

Purpose of the Study:

  • To compare the plasticizing effectiveness of 1-hexyl-3-methyl imidazolium chloride ([HMIM]Cl) against industry standards.
  • To evaluate the performance of [HMIM]Cl, alone and in combination with other plasticizers, for methacrylate polymers.
  • To assess the impact of [HMIM]Cl on the physico-mechanical properties, degradation, and thermophysical characteristics of polymers.

Main Methods:

  • Comparative analysis of [HMIM]Cl with glycerol and DOP as methacrylate polymer plasticizers.
  • Evaluation of stress-strain behavior, long-term degradation, and thermophysical properties.
  • Molecular vibrational analysis and molecular mechanics simulations were performed.

Main Results:

  • [HMIM]Cl demonstrated superior plasticizing effectiveness compared to glycerol and DOP, achieving desired properties at lower concentrations (20-30% w/w).
  • IL-polymer combinations exhibited enhanced long-term stability, remaining plasticized for over 14 days, significantly longer than glycerol (<5 days).
  • [HMIM]Cl-DOP combinations showed remarkable plasticizing capability and stability at concentrations above 30% w/w.

Conclusions:

  • Ionic liquids, particularly [HMIM]Cl, offer superior plasticizing performance for methacrylate polymers compared to traditional agents.
  • The use of ILs, individually or in combination, provides equivalent or enhanced plasticizing activity and long-term stability.
  • [HMIM]Cl presents a promising alternative for developing advanced, pliable, and stable methacrylate-based biomedical materials.