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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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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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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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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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Polymers: Molecular Weight Distribution01:10

Polymers: Molecular Weight Distribution

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For any given polymer, the weight average molecular weight (Mw) is higher than, if not equal to, the number average molecular weight (Mn). The only situation in which the weight average molecular weight and the number average molecular weight are equal is when a polymer consists only of chains with equal molecular weight. However, this never happens in a synthetic polymer, since it is difficult to control the polymerization process up to a molecular level with accuracy to a hundred percent.
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Related Experiment Video

Updated: Apr 11, 2026

Synthesis of Monodisperse Cylindrical Nanoparticles via Crystallization-driven Self-assembly of Biodegradable Block Copolymers
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Multiblock copolymers prepared by patterned modification: Analytical theory and computer simulations.

E N Govorun1, A A Gavrilov1, A V Chertovich1

  • 1Faculty of Physics, Lomonosov Moscow State University, Leninskie Gory 1-2, Moscow 119991, Russia.

The Journal of Chemical Physics
|June 1, 2015
PubMed
Summary

This study introduces a novel method for creating multiblock copolymers with unique lamellar structures. The research highlights their self-assembly properties and broad block-size distribution, crucial for advanced material design.

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Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions
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Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Nanotechnology

Background:

  • Multiblock copolymers are essential for self-assembly.
  • Controlling block size and distribution is key to material properties.

Purpose of the Study:

  • To describe a novel synthesis method for multiblock copolymers.
  • To analyze the sequence statistics and self-assembly of these copolymers.
  • To investigate the formation of lamellar structures.

Main Methods:

  • Hypothetical modification of monomer units in a polymer melt.
  • Analysis of block-size distribution P(k).
  • Simulation of morphological behavior using dissipative particle dynamics.

Main Results:

  • The block-size distribution follows P(k) ~ k(-3/2), indicating a prevalence of short blocks.
  • These copolymers exhibit extremely high block-size polydispersity.
  • Simulations reveal a stable, self-assembled lamellar structure with domain sizes larger than the initial pattern.

Conclusions:

  • The described synthesis method yields multiblock copolymers with unique statistical properties.
  • These copolymers can self-assemble into stable lamellar morphologies.
  • The resulting structures possess characteristics influenced by the synthesis parameters, offering potential for tailored material design.