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Related Concept Videos

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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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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Plastic Behavior01:21

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A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and...
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It is essential to understand how structural members behave under plastic deformation when the bending stress exceeds the material's yield strength. This state of deformation permanently alters the shape of the member, in contrast to the linear elastic behavior observed before yielding. The strain at any point in the member is expressed in terms of maximum strain. Notably, the neutral axis, which coincides with the centroid during elastic bending, shifts away from the centroid under plastic...
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Plastic Deformations01:19

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Plastic deformation represents a fundamental concept in materials science, which explains the irreversible change in the shape of a material when it experiences stress beyond its elastic capability. This phenomenon is important in structural engineering, especially in designing and analyzing cantilever beams—structures that are securely fixed at one end and bear loads at the opposite end. When these beams are subjected to loads within their elastic range, they will return to their...
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 Every plant cell has a cell wall that protects the cell, provides structural support, and gives the cell shape. Cellulose, the main structural component of the plant cell wall, makes up over 30% of plant matter. It is the most abundant organic compound on earth.  Cellulose is an unbranched polysaccharide composed of linear chains of glucose molecules linked by β (1→4) glycosidic bonds.
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Related Experiment Video

Updated: Feb 1, 2026

Method to Produce Durable Pellets at Lower Energy Consumption Using High Moisture Corn Stover and a Corn Starch Binder in a Flat Die Pellet Mill
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Method to Produce Durable Pellets at Lower Energy Consumption Using High Moisture Corn Stover and a Corn Starch Binder in a Flat Die Pellet Mill

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Corn starch plasticized with isosorbide and filled with microcrystalline cellulose: Processing and characterization.

Miguel R Area1, Maite Rico1, Belén Montero1

  • 1Universidade da Coruña, Grupo de Polímeros, Departamento de Física y Ciencias de la Tierra, Escuela Universitaria Politécnica, Serantes, Avda. 19 de Febrero s/n, 15471 Ferrol, Spain.

Carbohydrate Polymers
|December 17, 2018
PubMed
Summary

Biodegradable biocomposites made from plasticized corn starch and microcrystalline cellulose (MCC) offer enhanced properties. Isosorbide as a plasticizer resulted in superior biocomposite performance for sustainable packaging.

Keywords:
BiocompositeInternal mixerIsosorbideMicrocrystalline celluloseThermoplastic starch

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Area of Science:

  • Materials Science
  • Polymer Science
  • Biocomposites

Background:

  • Growing demand for sustainable and biodegradable materials in packaging.
  • Limitations of conventional plastics and the need for eco-friendly alternatives.
  • Corn starch as a renewable and biodegradable polymer base.

Purpose of the Study:

  • To develop innovative, green, and fully biodegradable biocomposites using plasticized corn starch and microcrystalline cellulose (MCC).
  • To investigate the effects of different plasticizers (isosorbide and glycerol) and MCC content on material properties and processability.
  • To evaluate the thermal stability and retrogradation phenomena of the developed biocomposites.

Main Methods:

  • Melt processing of corn starch plasticized with isosorbide or glycerol.
  • Incorporation of microcrystalline cellulose (MCC) as a filler.
  • Analysis of processing parameters, surface morphology, crystallinity, and thermal stability.
  • Study of retrogradation over time for aged materials.

Main Results:

  • Biocomposites processed with isosorbide showed greater homogeneity, requiring lower temperatures but higher shear and processing times.
  • Isosorbide-plasticized biocomposites exhibited higher crystallinity and no retrogradation, unlike those plasticized with glycerol.
  • Optimal properties were achieved with 35% isosorbide content and MCC incorporation, attributed to good filler-matrix adhesion.

Conclusions:

  • Biodegradable biocomposites based on plasticized corn starch and MCC demonstrate promising properties for various applications.
  • Isosorbide is a superior plasticizer compared to glycerol for enhancing corn starch biocomposite performance and stability.
  • These biocomposites represent a viable, eco-friendly alternative for sustainable packaging solutions.