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Related Concept Videos

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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Cationic Chain-Growth Polymerization: Mechanism00:57

Cationic Chain-Growth Polymerization: Mechanism

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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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Related Experiment Video

Updated: Apr 13, 2026

Synthesis of Monodisperse Cylindrical Nanoparticles via Crystallization-driven Self-assembly of Biodegradable Block Copolymers
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Process-directed self-assembly of block copolymers: a computer simulation study.

Marcus Müller1, De-Wen Sun

  • 1Institute for Theoretical Physics, Georg-August University, 37077 Göttingen, Germany.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|April 30, 2015
PubMed
Summary
This summary is machine-generated.

Researchers can control block copolymer self-assembly by rapidly changing conditions to trap desired structures. This process-directed self-assembly offers a new way to create complex materials by managing kinetics, not just molecular design.

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Area of Science:

  • Polymer Science
  • Materials Science
  • Chemical Engineering

Background:

  • Block copolymer self-assembly is complex, with many stable states and slow structure formation.
  • Controlling morphology requires either altering molecular structure or blending components.

Purpose of the Study:

  • To explore process-directed self-assembly for controlling block copolymer morphology.
  • To investigate trapping specific metastable states through rapid changes in thermodynamic conditions.

Main Methods:

  • Simulations were used to model self-assembly kinetics.
  • Comparison with free-energy techniques validated simulation results.

Main Results:

  • Rapid changes (quenches) in thermodynamic conditions can reproducibly trap specific metastable morphologies.
  • Controlling the initial unstable state is crucial for directing self-assembly towards desired structures.
  • Non-equilibrium molecular conformations and local density conservation are important factors.

Conclusions:

  • Process-directed self-assembly provides an alternative route to fabricating complex network structures.
  • This method bypasses the need for extensive molecular engineering.
  • Understanding non-equilibrium states is key to controlling self-assembly kinetics.