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Related Concept Videos

Polymers: Defining Molecular Weight01:01

Polymers: Defining Molecular Weight

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Unlike small molecules with definite molecular weights, polymers are a mixture of individual polymer chains of varying lengths, each with a unique molecular weight.  So, the molecular weight of a polymer is expressed as an average value based on the average size of the polymer chains. The two most common forms of averages used for polymers are the number average molecular weight and weight average molecular weight.
The number average molecular weight (Mn) is the summation of the number...
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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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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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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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Ziegler–Natta Chain-Growth Polymerization: Overview01:17

Ziegler–Natta Chain-Growth Polymerization: Overview

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Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta...
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Integrating Machine Learning in the Coarse-Grained Molecular Simulation of Polymers.

Eleonora Ricci1,2, Niki Vergadou1

  • 1Institute of Nanoscience and Nanotechnology, National Center for Scientific Research "Demokritos", GR-15341 Agia Paraskevi, Athens, Greece.

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This summary is machine-generated.

Machine learning (ML) enhances molecular simulations for complex materials. Integrating ML into coarse-grained simulations accelerates polymer informatics and materials design.

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Area of Science:

  • Computational chemistry and materials science
  • Application of machine learning in physical sciences and engineering

Background:

  • Machine learning (ML) is increasingly impacting physical sciences, engineering, and technology.
  • ML integration into molecular simulation frameworks offers potential for complex materials study and property prediction.
  • While ML in materials informatics shows promise, its integration with multiscale molecular simulation for polymers remains an untapped area.

Purpose of the Study:

  • To present pioneering research integrating ML into multiscale molecular simulation for polymers.
  • To discuss the contribution of ML-based techniques to developing multiscale simulation methods for complex chemical systems.
  • To explore prerequisites and challenges for systematic ML-based coarse-graining schemes in polymers.

Main Methods:

  • Review of recent research integrating ML into multiscale molecular simulation for polymers.
  • Discussion of ML's role in advancing coarse-grained (CG) simulations for macromolecular systems.
  • Analysis of requirements and open challenges for ML-driven coarse-graining.

Main Results:

  • Pioneering research demonstrates the potential of ML in polymer informatics and multiscale simulations.
  • ML techniques can significantly contribute to the development of advanced simulation methods for polymers.
  • Identified prerequisites and challenges for systematic ML-based coarse-graining schemes.

Conclusions:

  • Integrating ML into multiscale molecular simulations, particularly coarse-grained methods, is crucial for advancing polymer informatics.
  • Further research is needed to overcome challenges and develop systematic ML-based coarse-graining schemes.
  • This approach promises to accelerate the design and discovery of efficient materials.