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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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Polymers02:34

Polymers

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The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
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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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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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Characteristics and Nomenclature of Copolymers01:24

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Copolymers are the products obtained from the polymerization of multiple monomer species. So, in a polymer chain itself, there can be multiple repeating units that come from different monomers. The process of synthesizing a polymer from different monomer species is called copolymerization. When two monomers are involved, the polymer is known as a bipolymer. Polymers with three and four monomers are termed terpolymers and quaterpolymers, respectively. Figure 1 depicts the copolymerization of...
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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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Related Experiment Video

Updated: Jun 21, 2025

Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application
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Bio-Based Polyurethane Networks Containing Sunflower Oil Based Polyols.

Katalin Czifrák1, Csilla Lakatos1, Csaba Cserháti2

  • 1Department of Applied Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary.

International Journal of Molecular Sciences
|July 13, 2024
PubMed
Summary

This study synthesized novel polyurethanes (SO-PU) using sunflower oil glycerides as a diol component. These bio-based polyurethanes show promise for creating biocompatible and biodegradable scaffolds with tunable mechanical properties.

Keywords:
biocompatible scaffoldcrosslinkingglyceride mixturenatural polymerspolyurethanesunflower oil

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Biomaterials

Background:

  • Polyurethanes are versatile polymers with diverse applications.
  • There is a growing demand for sustainable and bio-based materials in polymer science.
  • Sunflower oil offers a renewable resource for developing novel polymer components.

Purpose of the Study:

  • To synthesize and characterize polyurethanes (SO-PU) incorporating sunflower oil glycerides.
  • To evaluate the structural, thermal, and mechanical properties of the synthesized SO-PU.
  • To assess the potential of SO-PU for applications in biocompatible and biodegradable scaffolds.

Main Methods:

  • Transesterification of sunflower oil with glycerol to create a glyceride mixture.
  • Two-step polyurethane synthesis using diisocyanates (MDI or HDI) and the glyceride mixture.
  • Characterization using MALDI-TOF MS, NMR, SEC, ATR-FTIR, DSC, TGA, and SEM.
  • Mechanical testing and analysis using stress-strain curves.

Main Results:

  • Successful synthesis of SO-PU incorporating sunflower oil glycerides.
  • Characterization confirmed the structure and properties of the glyceride mixture and SO-PU.
  • SO-PU films exhibited suitable properties for scaffold preparation.
  • Mechanical behavior was analyzed and modeled, considering yield and strain hardening.

Conclusions:

  • Sunflower oil glycerides can be effectively used as a diol component in polyurethane synthesis.
  • The resulting SO-PU materials are potentially biocompatible and biodegradable.
  • These novel polyurethanes offer tunable mechanical properties for advanced material applications.