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Related Concept Videos

Bioplastics01:27

Bioplastics

47
Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...
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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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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 polymer...
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Bio-Based Polyurethane Foams: Feedstocks, Synthesis, and Applications.

Marta Santos1,2, Marcos Mariz1, Igor Tiago3

  • 1CERES, Chemical Engineering and Renewable Resources for Sustainability, University of Coimbra, 3030-790 Coimbra, Portugal.

Biomolecules
|May 28, 2025
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Summary
This summary is machine-generated.

This review highlights the shift towards sustainable polyurethanes (PUs) by utilizing bio-based polyols derived from natural sources. It explores bio-polyols, bio-fillers, and non-isocyanate polyurethanes (NIPUs) for eco-friendly PU foams.

Keywords:
bio-based polyurethane foamsbio-polyolsrenewable sources

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Sustainable Chemistry

Background:

  • Polyurethanes (PUs) are versatile polymers traditionally synthesized from petroleum-derived polyols and isocyanates.
  • Growing demand for eco-friendly materials drives research into renewable feedstocks for PU production.
  • Replacing fossil-based polyols with bio-based alternatives is a key strategy for sustainable PU synthesis.

Purpose of the Study:

  • To review natural sources and methods for transforming them into bio-polyols.
  • To explore the integration of bio-fillers into polyurethane formulations.
  • To examine the production and application of non-isocyanate polyurethanes (NIPUs).

Main Methods:

  • Literature review of natural sources for bio-polyols.
  • Analysis of methods for bio-polyol synthesis and characterization.
  • Investigation of bio-polyol incorporation into polyurethane foams and NIPUs.

Main Results:

  • Identified various natural sources and effective transformation routes for bio-polyols.
  • Demonstrated successful incorporation of bio-fillers and bio-polyols in PU formulations.
  • Highlighted the potential of non-isocyanate polyurethanes (NIPUs) as a sustainable alternative.

Conclusions:

  • Bio-polyols offer a promising renewable alternative to fossil-based polyols in polyurethane synthesis.
  • The use of bio-polyols and bio-fillers can lead to more sustainable and eco-friendly polyurethane materials.
  • Further research into bio-polyols and NIPUs can advance the development of sustainable polymers for diverse applications.