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Polymer Classification: Architecture01:14

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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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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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Unprecedented Processable Hypercrosslinked Polymers with Controlled Knitting.

Shaolei Wang1, Chengxin Zhang1, Qingsong Liu1

  • 1Key Laboratory for Materials Chemistry for Energy Conversion Storage, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.

Macromolecular Rapid Communications
|October 8, 2021
PubMed
Summary
This summary is machine-generated.

Researchers developed a new, economical method for creating processable hypercrosslinked polymers (HCPs) using divinylbenzene. This sustainable approach yields high-surface-area HCP monoliths with excellent mechanical strength, overcoming production challenges.

Keywords:
controlled knittinghigh mechanical strengthporous monolithsprocessable hypercrosslinked polymers

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Area of Science:

  • Materials Science
  • Polymer Chemistry

Background:

  • Processable microporous organic polymers (MOPs) are crucial for applications like monoliths and membranes.
  • Current MOP synthesis often requires harsh conditions, expensive catalysts, and specialized monomers, hindering sustainable and large-scale production.
  • Economical mass production of processable MOPs remains a significant challenge.

Purpose of the Study:

  • To develop a novel, economical, and sustainable strategy for synthesizing processable hypercrosslinked polymers (HCPs).
  • To investigate the use of divinylbenzene (DVB) as a self-crosslinking monomer for HCP synthesis.
  • To achieve high surface area and mechanical strength in the resulting HCP monoliths.

Main Methods:

  • A two-step synthesis involving pre-crosslinking and deep-crosslinking was employed.
  • Divinylbenzene (DVB) was used as a self-crosslinking monomer.
  • A small amount of FeCl3 catalyst was utilized under mild conditions.

Main Results:

  • Processable hypercrosslinked polymer (HCP) monoliths were successfully synthesized.
  • The resulting HCPs exhibited high Brunauer–Emmett–Teller (BET) surface areas ranging from 1033 to 1056 m² g⁻¹.
  • The HCP monoliths demonstrated excellent mechanical strength, up to 65 MPa.
  • The synthesis produced no by-products.

Conclusions:

  • This study presents a novel and cost-effective method for producing processable HCP monoliths.
  • The use of DVB as a self-crosslinking monomer offers a sustainable alternative for MOP synthesis.
  • The developed HCPs possess desirable properties, including high surface area and mechanical robustness, suitable for practical applications.