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Related Concept Videos

Types of Step-Growth Polymers: Polyesters01:20

Types of Step-Growth Polymers: Polyesters

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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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Free-Radical Chain Reaction and Polymerization of Alkenes02:35

Free-Radical Chain Reaction and Polymerization of Alkenes

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The conversion of alkenes to macromolecules called polymers is a reaction of high commercial importance. The structure of the polymer is defined by a repeating unit, while the terminal groups are considered insignificant. The average degree of polymerization represents the number of repeating units in the polymer molecule and is denoted by the subscript n.
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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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Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)00:53

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)

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Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
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Bioremediation00:46

Bioremediation

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Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
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Radical Chain-Growth Polymerization: Chain Branching01:17

Radical Chain-Growth Polymerization: Chain Branching

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The skeletal structure of polymers synthesized via radical polymerization is always branched. For example, the polymerization of ethylene by radical polymerization results in a low-density grade of polyethylene with a heavily branched skeletal structure. Here, the radical site abstracts hydrogen from the growing chain, and the radical site shifts from the end (a primary carbon center) to anywhere within the growing chain (a secondary carbon center). Consequently, the part of the chain from the...
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Related Experiment Video

Updated: Jul 29, 2025

Isolation of Native Soil Microorganisms with Potential for Breaking Down Biodegradable Plastic Mulch Films Used in Agriculture
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[Polyethylene biodegradation: current status and perspectives].

Liting Zhang1, Bo Zhang1, Weidong Xu1

  • 1Key Laboratory of Agricultural Environmental Microbiology of the Ministry of Agriculture and Rural Affairs, College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China.

Sheng Wu Gong Cheng Xue Bao = Chinese Journal of Biotechnology
|May 22, 2023
PubMed
Summary
This summary is machine-generated.

Polyethylene (PE) pollution is a major environmental concern. This review explores microbial biodegradation of PE, highlighting enzymes and pathways, and suggests future research directions for effective plastic waste management.

Keywords:
biodegradationdegradation mechanismsdegrading microorganismsenzymespolyethylene

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Area of Science:

  • Environmental Science
  • Microbiology
  • Polymer Science

Background:

  • Polyethylene (PE) is a widely used synthetic resin highly resistant to degradation, leading to significant environmental pollution.
  • Conventional waste management methods like landfill, composting, and incineration are insufficient for addressing PE pollution.
  • Microbial biodegradation offers an eco-friendly and cost-effective solution for plastic waste management.

Approach:

  • This review synthesizes current knowledge on the chemical structure of polyethylene.
  • It details identified PE-degrading microorganisms, their enzymes, and metabolic pathways.
  • The review provides a comprehensive overview of PE biodegradation research.

Key Points:

  • Microorganisms possess enzymes capable of breaking down polyethylene's resilient chemical structure.
  • Understanding metabolic pathways is crucial for optimizing PE biodegradation processes.
  • Research has identified various microbial species with PE-degrading capabilities.

Conclusions:

  • Future research should focus on isolating highly efficient PE-degrading microbial strains.
  • Developing synthetic microbial consortia can enhance biodegradation efficacy.
  • Screening and modifying degrading enzymes are essential for advancing PE biodegradation technologies.