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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.
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Step-growth or condensation polymerization is a stepwise reaction of bi or multifunctional monomers to form long-chain polymers. As all the monomers are reactive, most of the monomers are consumed at the early stages of the reaction to form small chains of reactive oligomers, which then combine to form long polymer chains in the late stages. Hence, the reaction has to proceed for a long time to achieve high molecular weight polymers.
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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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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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Enabling New Approaches: Recent Advances in Processing Aliphatic Polycarbonate-Based Materials.

Peiran Wei1, Gulzar A Bhat2, Donald J Darensbourg3

  • 1Soft Matter Facility, Texas A&M University, 1313 Research Parkway, College Station, TX, 77845, USA.

Angewandte Chemie (International Ed. in English)
|August 3, 2023
PubMed
Summary
This summary is machine-generated.

Aliphatic polycarbonates (aPCs) are versatile, biocompatible materials. This review details processing techniques like self-assembly and 3D printing to guide researchers in selecting optimal methods for diverse applications.

Keywords:
Additive ManufacturingAliphatic PolycarbonatesElectrospinningLithographySelf-Assembly

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Area of Science:

  • Polymer Science
  • Materials Science
  • Biomaterials Engineering

Background:

  • Aliphatic polycarbonates (aPCs) are increasingly utilized as functional materials.
  • Their biocompatibility and tunable degradation properties are key advantages.
  • Recent advances in polymerization have broadened their chemical diversity.

Purpose of the Study:

  • To provide a comprehensive review of processing techniques for aliphatic polycarbonates.
  • To assist researchers in selecting appropriate manufacturing methods for aPC-based materials.
  • To identify challenges and opportunities for aPC integration in industrial applications.

Main Methods:

  • Review of controlled self-assembly techniques.
  • Analysis of electrospinning methodologies for aPCs.
  • Exploration of additive manufacturing (3D printing) for aPC processing.
  • Discussion of other relevant fabrication methods.

Main Results:

  • A concise overview of recent advancements in aPC processing techniques is presented.
  • Specific techniques discussed include controlled self-assembly, electrospinning, and additive manufacturing.
  • The review highlights the adaptability of aPCs across various applications.

Conclusions:

  • The paper aims to equip researchers with knowledge to select optimal processing techniques for aliphatic polycarbonates.
  • Addressing current challenges will foster sustainable growth and industrial adoption of aPCs.
  • Further research into processing methods is crucial for expanding aPC applications in biomedical and energy fields.