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Related Concept Videos

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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Correlations02:20

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Correlation means that there is a relationship between two or more variables (such as ice cream consumption and crime), but this relationship does not necessarily imply cause and effect. When two variables are correlated, it simply means that as one variable changes, so does the other. We can measure correlation by calculating a statistic known as a correlation coefficient. A correlation coefficient is a number from -1 to +1 that indicates the strength and direction of the relationship between...
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Statistical tests can calculate whether there is a relationship, or correlation, between independent and dependent variables. An indirect relationship of the variables signifies a correlation, while a direct relationship shows causation. If it is determined that no connection exists between the variables, then the correlation is a coincidence.
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Plasticizers

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Water-reducers, or plasticizers, are chemical admixtures used in concrete to improve strength and workability. These additives reduce the water-cement ratio without compromising workability, lower the cement content while maintaining the same workability, or increase workability to assist concrete placement in inaccessible areas.
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Plasticity00:58

Plasticity

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Plasticity is the property where an object loses its elasticity and undergoes irreversible deformation, even after the deformation forces are eliminated. If a material deforms irreversibly without increasing stress or load, then this is called ideal plasticity. For example, when a force is applied to an aluminum rod, it changes its shape, but it does not return to its original shape once the force is removed. Plastic deformation or ductility is thus a permanent deformation or change in the...
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Steps in the Modeling Process01:14

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Albert Bandura's theory of observational learning identifies four critical processes: attention, retention, motor reproduction, and reinforcement or motivation.
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The Effect of Construction and Demolition Waste Plastic Fractions on Wood-Polymer Composite Properties
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Polymer Processing: Modeling and Correlations Finalized to Tailoring Plastic Part Morphology and Properties.

Giuseppe Titomanlio1, Vito Speranza2

  • 1Department of Industrial Engineering, University of Salerno, via Giovanni Paolo II, 132, 84084 Fisciano, Italy. gtitomanlio@unisa.it.

Materials (Basel, Switzerland)
|April 25, 2019
PubMed
Summary

This research analyzes polymer processing, focusing on heat and momentum transfer during solidification to optimize material properties. Understanding these phenomena is key to improving final product morphology and performance.

Keywords:
additive manufacturingcomposite laminatesextrusionfilm stretchinginjection moldinglaser-assisted thermal imprintingmicroinjection moldingmorphologynumerical simulation

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Area of Science:

  • Polymer Science and Engineering
  • Materials Science
  • Chemical Engineering

Background:

  • Polymer processing operations necessitate detailed analysis of transient momentum and heat transfer, including material solidification.
  • Optimizing final part properties relies on understanding and controlling the morphology developed during processing.

Discussion:

  • This special issue presents a review and 11 research articles on polymer processing.
  • Both experimental and numerical analyses were employed to investigate key phenomena affecting product morphology and properties.

Key Insights:

  • Simultaneous transient momentum and heat transfer analysis is crucial for polymer processing.
  • Understanding solidification phenomena directly impacts final polymer part properties and morphology.
  • A comprehensive collection of studies addresses various polymer processing operations.

Outlook:

  • Further research can refine models for predicting and controlling polymer morphology.
  • Optimization of processing parameters can lead to enhanced material properties.
  • Advancements in experimental and numerical techniques will improve the analysis of polymer solidification.