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Related Concept Videos

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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Polymer Classification: Crystallinity01:21

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Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
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Polymer Classification: Stereospecificity01:26

Polymer Classification: Stereospecificity

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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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Types of Step-Growth Polymers: Polyesters01:20

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The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and 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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Polymers02:34

Polymers

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Special Issue: Processing, Structure, Dynamics and Mechanical Properties of Polymeric Materials.

Janusz W Sikora1

  • 1Department of Technology and Polymer Processing, Faculty of Mechanical Engineering, Lublin University of Technology, 36, Nadbystrzycka St., 20-618 Lublin, Poland.

Materials (Basel, Switzerland)
|May 20, 2022
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Summary

This special issue explores advanced polymeric materials, focusing on innovative processing techniques and their impact on material structure, dynamics, and mechanical properties for diverse industrial applications.

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Area of Science:

  • Polymer Science and Engineering
  • Materials Science and Engineering
  • Mechanical Engineering

Background:

  • This special issue focuses on the interdisciplinary research of polymeric materials.
  • It highlights advancements in processing, structure, dynamics, and mechanical properties.
  • Scientists from academia and industry contribute cutting-edge research.

Discussion:

  • Discussions cover standard and innovative processing machines for new polymeric materials.
  • Research delves into understanding the intricate relationship between material structure and properties.
  • The dynamics of polymeric materials under various conditions are explored.

Key Insights:

  • Novel processing methods enhance the performance of polymeric materials.
  • Structure-property correlations are crucial for material design and application.
  • Understanding material dynamics is key to predicting long-term behavior and durability.

Outlook:

  • Future research will likely focus on sustainable processing and advanced characterization techniques.
  • Integration of computational modeling with experimental studies will accelerate material discovery.
  • New applications in fields like biomedical engineering and advanced manufacturing are anticipated.