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Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)01:16

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Ring-opening metathesis polymerization or ROMP involves strained cycloalkenes as starting materials. The mechanism of ROMP proceeds by reacting cycloalkene with Grubbs catalyst to give metallacyclobutane intermediate which undergoes a ring-opening reaction to form new carbene. The new carbene reacts with another molecule of cycloalkene. Repetition of these steps leads to the formation of an unsaturated open-chain polymer product. All these steps are reversible, however, relieving the ring...
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The behavior of elastoplastic materials under bending stresses, particularly in structural members with rectangular cross-sections, is crucial for predicting material responses and understanding failure modes. Initially, when a bending moment is applied, the stress distribution across the section follows Hooke's Law and is linear and elastic. This distribution means the stress increases from the neutral axis to the maximum at the outer fibers, up to the elastic limit.
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Fabricating Superhydrophobic Polymeric Materials for Biomedical Applications
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Current development of biodegradable polymeric materials for biomedical applications.

Richard Song1, Maxwell Murphy1, Chenshuang Li1

  • 1Division of Growth and Development, Section of Orthodontics, School of Dentistry, University of California, Los Angeles, Los Angeles, CA, USA, zzheng@dentistry.ucla.edu.

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|October 6, 2018
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Biodegradable polymers are advancing for biomedical uses like tissue engineering and drug delivery. Research focuses on natural and synthetic materials with specific properties for implants and therapies.

Keywords:
drug deliverynatural biomaterialssynthetic biomaterialstissue engineeringwound healing

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Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Biomedical Engineering

Background:

  • Significant advancements in biodegradable polymers over the past 50 years.
  • These materials are crucial for temporary implants, tissue engineering scaffolds, and controlled drug delivery systems.
  • Specific physicochemical, biological, and degradation properties are essential for effective therapeutic applications.

Purpose of the Study:

  • To review the current development of biodegradable natural and synthetic polymeric materials.
  • To highlight their diverse biomedical applications.
  • To discuss the properties required for effective therapeutic delivery.

Main Methods:

  • Literature review of natural and synthetic biodegradable polymers.
  • Analysis of polymers undergoing hydrolytic or enzymatic degradation.
  • Categorization of applications including tissue engineering, temporary implants, wound healing, and drug delivery.

Main Results:

  • Biodegradable polymers show great promise for various biomedical applications.
  • Both natural and synthetic polymers are being extensively studied.
  • Tailoring material properties is key to successful therapeutic outcomes.

Conclusions:

  • Biodegradable polymers are a cornerstone of modern biomedical innovation.
  • Continued research into material properties and degradation mechanisms is vital.
  • These materials offer versatile solutions for tissue regeneration and drug delivery.