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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 polymer...
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Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
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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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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.
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Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer
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Sustainable Elastomers from Renewable Biomass.

Zhongkai Wang1,2, Liang Yuan2, Chuanbing Tang2

  • 1School of Forestry and Landscape Architecture, Anhui Agriculture University , Hefei, Anhui 230036, China.

Accounts of Chemical Research
|June 22, 2017
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Summary
This summary is machine-generated.

This study explores sustainable elastomers derived from biomass, focusing on triblock and graft copolymers. These biobased materials offer a renewable alternative to petroleum products, with tunable properties for diverse applications.

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Area of Science:

  • Polymer Science
  • Materials Science
  • Biotechnology

Background:

  • Sustainable elastomers are gaining traction due to the rise of biobased materials from renewable resources.
  • Challenges remain in controlling polymer composition, architecture, processability, and recyclability of sustainable elastomers.
  • Existing biobased elastomers include molecular-biomass-derived polymers and plant oil-based thermosets.

Purpose of the Study:

  • To review recent advancements in preparing monomers and thermoplastic elastomers (TPEs) from biomass.
  • To explore novel macromolecular architectures for sustainable elastomers.
  • To develop high-performance, cost-competitive biobased elastomers as alternatives to petroleum-based products.

Main Methods:

  • Synthesis of ABA triblock copolymer TPEs using soybean-oil-based monomers and styrene.
  • Formulation of triblock copolymer TPEs from rosin acids and soybean oil.
  • Development of multigraft copolymers with rigid backbones (cellulose, lignin) and elastic side chains (e.g., polyisoprene).
  • Cross-linking of graft copolymers to create elastomers with controlled network structures.

Main Results:

  • Successfully synthesized triblock copolymer TPEs with biomass components.
  • Demonstrated novel multigraft copolymer architectures with rigid backbones and elastic side chains.
  • Achieved cellulose/lignin graft copolymers with excellent elastic properties.
  • Created human-skin-mimic and high-resilient elastomers with tunable mechanical properties via cross-linking.
  • Showcased the potential of bioelastomers as renewable alternatives to petroleum products.

Conclusions:

  • Biomass-derived monomers and polymers are key to developing sustainable elastomers.
  • Innovative macromolecular architectures, such as triblock and graft copolymers, enable tailored elastomer properties.
  • Biobased elastomers can achieve performance comparable to petroleum-based counterparts, offering environmental benefits.
  • Further research into biomass utilization and polymer engineering can unlock a wide range of sustainable elastomer applications.