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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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Novel Hydroxyl-Functional Aliphatic CO2-Based Polycarbonates: Synthesis and Properties.

Nikita M Maximov1, Sergey A Rzhevskiy2, Andrey F Asachenko1,2

  • 1Faculty of Chemistry, Lomonosov Moscow State University, Lenin Hills, 1, bld. 3, 119991 Moscow, Russia.

International Journal of Molecular Sciences
|October 29, 2025
PubMed
Summary
This summary is machine-generated.

Novel functional polycarbonates were synthesized using ring-opening copolymerization. These new materials, poly(solketal glycidyl ether carbonate-co-propylene carbonate)s, offer tunable properties and undergo easier degradation after deprotection.

Keywords:
polycarbonatesrac-(salcy)CoIIIX complexesring-opening copolymerization

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Area of Science:

  • Polymer Chemistry
  • Organic Synthesis
  • Materials Science

Background:

  • Developing functional polycarbonates with controlled properties is crucial for advanced material applications.
  • Ring-opening polymerization offers a versatile route to synthesize complex polymer architectures.
  • Catalytic systems are key to achieving high selectivity and control over polymer properties.

Purpose of the Study:

  • To synthesize novel functional polycarbonates, poly(solketal glycidyl ether carbonate-co-propylene carbonate)s, via ring-opening copolymerization.
  • To investigate the effect of reaction conditions, such as water addition, on polymer molecular weight distribution.
  • To explore the properties and cyclodepolymerization behavior of the synthesized hydroxyl-functional polycarbonates.

Main Methods:

  • Ring-opening copolymerization of solketal glycidyl ether, propylene oxide, and carbon dioxide.
  • Catalysis using rac-(salcy)CoIIIX complexes and bis(triphenylphosphine)iminium salts.
  • Acidic hydrolysis for deprotection of solketal groups.

Main Results:

  • Terpolymers with number-average molecular weights from 2 × 104 to 1 × 105 and narrow bimodal molecular weight distributions (dispersities of 1.02-1.07) were obtained.
  • Addition of water resulted in terpolymers with unimodal distributions (dispersity of 1.11).
  • Hydroxyl-functional polycarbonates showed amorphous nature with Tg near or below room temperature and underwent cyclodepolymerization under milder conditions.

Conclusions:

  • Novel functional polycarbonates were successfully synthesized with controlled molecular weights and distributions.
  • The presence of hydroxyl groups enhances the degradability of the polycarbonates.
  • These materials hold potential for applications requiring degradable and functional polymers.