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Characteristics and Nomenclature of Copolymers01:24

Characteristics and Nomenclature of Copolymers

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Copolymers are the products obtained from the polymerization of multiple monomer species. So, in a polymer chain itself, there can be multiple repeating units that come from different monomers. The process of synthesizing a polymer from different monomer species is called copolymerization. When two monomers are involved, the polymer is known as a bipolymer. Polymers with three and four monomers are termed terpolymers and quaterpolymers, respectively. Figure 1 depicts the copolymerization of...
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Characteristics and Nomenclature of Homopolymers01:00

Characteristics and Nomenclature of Homopolymers

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Polymers that are made up of identical monomer units are called homopolymers. Only one repeating unit is involved in the construction of the homopolymer structure. For example, as depicted in Figure 1, polypropylene is a homopolymer constituted of propylene monomers. Here, the only repeating unit in the polymer chain is propylene.
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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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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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Polymers02:34

Polymers

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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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Molecular Weight of Step-Growth Polymers01:08

Molecular Weight of Step-Growth Polymers

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Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
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Simplified Polymer Particle Design: Using Block Copolymers to Create Multihollow Structures.

Netnapha Kamlangmak1, Thitirat Rattanawongwiboon2, Hideto Minami3

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Researchers developed versatile multihollow polymer particles using block copolymers as porogens. These particles demonstrate excellent adsorption and reusability, showing promise for diverse applications.

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Using Polystyrene-block-polyacrylic acid-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization
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Facile Synthesis of Worm-like Micelles by Visible Light Mediated Dispersion Polymerization Using Photoredox Catalyst
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Area of Science:

  • Polymer Chemistry
  • Materials Science

Background:

  • Developing novel polymer architectures is crucial for advanced material applications.
  • Multihollow polymer particles offer unique properties due to their internal structures.

Purpose of the Study:

  • To synthesize multihollow polymer particles using a block copolymer as a porogen.
  • To characterize the structure, porosity, and adsorption capabilities of the synthesized particles.

Main Methods:

  • Synthesized poly(2-(dimethylamino)ethyl methacrylate)-block-poly(methyl methacrylate-3-(trimethoxysilyl) propyl methacrylate) (PDMAEMA-b-P(MMA-MPS)) via solution iodine transfer polymerization.
  • Utilized the block copolymer as a porogen in microsuspension polymerization of ethylene glycol dimethacrylate (EGDMA) and hydroxyethyl methacrylate (HEMA).
  • Characterized particle morphology using Scanning Electron Microscopy (SEM) and porosity using Brunauer–Emmett–Teller (BET) analysis.

Main Results:

  • Achieved 99% monomer conversion within 24 hours, indicating a smooth polymerization process.
  • SEM confirmed the formation of multihollow polymer particle structures.
  • BET analysis revealed well-defined porosity, and dye adsorption studies confirmed efficient performance in both aqueous and oil phases.
  • Particles maintained over 80% adsorption efficiency after ten reuse cycles.

Conclusions:

  • A facile and versatile method for producing multihollow polymer particles using block copolymers as porogens was established.
  • The synthesized multihollow P(EGDMA-HEMA) particles exhibit promising adsorption properties and reusability.
  • This technique offers a viable route for creating advanced polymer materials for various applications.