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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.
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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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Characteristics and Nomenclature of Homopolymers01:00

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Polymers that are made up of identical monomer units are called homopolymers. Only one repeating unit is involved in the construction of the homopolymer structure. For example, as depicted in Figure 1, polypropylene is a homopolymer constituted of propylene monomers. Here, the only repeating unit in the polymer chain is propylene.
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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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Updated: Oct 30, 2025

Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application
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Sophorolipid-Based Oligomers as Polyol Components for Polyurethane Systems.

Maresa Sonnabend1, Suzanne G Aubin1, Annette M Schmidt2

  • 1Macromolecular Chemistry and Polymer Technology, TH Köln, Kaiser-Wilhelm-Allee E39, 51368 Leverkusen, Germany.

Polymers
|July 2, 2021
PubMed
Summary

Sophorolipids (SL) offer a sustainable route to bio-based polyols for polyurethane (PU) systems. These versatile molecules can function as plasticizers or crosslinkers, enabling novel applications in PU chemistry.

Keywords:
bio-basedhydroxyl fatty acid based polyolsplatform chemicalspolyolpolyurethanesophorolipid-based polyols

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Area of Science:

  • Polymer Chemistry
  • Sustainable Materials
  • Biotechnology

Background:

  • Growing demand for sustainable and resource-conserving materials drives research into polyurethane (PU) systems.
  • Bio-based polyols are of significant interest for developing novel PU products with unique properties.
  • Sophorolipids (SL) present a promising bio-based platform for creating polyol building blocks.

Purpose of the Study:

  • To evaluate the potential of Sophorolipids (SL) as building blocks for polyurethane (PU) chemistry.
  • To investigate the synthesis, derivatization, reproducibility, and reactivity of SL-derived materials towards isocyanates.
  • To explore the application of SL in PU systems as plasticizers or crosslinkers.

Main Methods:

  • Derivatization of Sophorolipids (SL) to obtain (ω-1)-hydroxyl fatty acids.
  • Conversion of these fatty acids into polyester polyols and subsequently into polyurethanes (PU).
  • Preparation of (ω-1)-hydroxyl fatty acid azides from SL and their conversion to A/B type PU via Curtius rearrangement.

Main Results:

  • Sophorolipids (SL) demonstrated versatility, acting as either crosslinkers or plasticizers in PU systems based on stoichiometry.
  • Successful synthesis of polyester polyols and PU from SL-derived (ω-1)-hydroxyl fatty acids.
  • Indirect preparation of (ω-1)-hydroxyl fatty acid azides from SL, leading to A/B type PU.

Conclusions:

  • Sophorolipids (SL) are a viable and sustainable resource for developing bio-based polyols for polyurethane applications.
  • The study confirms the potential of SL to be tailored for specific roles (plasticizer or crosslinker) in PU formulations.
  • Further research into SL derivatization opens new avenues for creating advanced, sustainable PU materials.