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Related Concept Videos

Polymer Classification: Architecture01:14

Polymer Classification: Architecture

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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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Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...
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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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The skeletal structure of polymers synthesized via radical polymerization is always branched. For example, the polymerization of ethylene by radical polymerization results in a low-density grade of polyethylene with a heavily branched skeletal structure. Here, the radical site abstracts hydrogen from the growing chain, and the radical site shifts from the end (a primary carbon center) to anywhere within the growing chain (a secondary carbon center). Consequently, the part of the chain from the...
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Polymeric carriers enhance targeted drug delivery by increasing efficacy while minimizing off-target effects. These carriers comprise a biodegradable polymeric backbone integrated with functional elements that enable targeting, improve physicochemical properties, and regulate drug release.Targeting MechanismsThe targeting ability of polymeric carriers is mediated by a homing device, which is a molecular recognition component designed to selectively bind to specific tissues or cells. Monoclonal...
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The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
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Fabricating Superhydrophobic Polymeric Materials for Biomedical Applications
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Bioapplications of hyperbranched polymers.

Dali Wang1, Tianyu Zhao, Xinyuan Zhu

  • 1School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, 200240 Shanghai, P. R. China. xyzhu@sjtu.edu.cn.

Chemical Society Reviews
|September 2, 2014
PubMed
Summary
This summary is machine-generated.

Hyperbranched polymers (HBPs) offer unique advantages for biomedical applications due to their convenient synthesis, tunable properties, and excellent biocompatibility. These nanopolymeric architectures show significant promise for developing advanced biomaterials.

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Biomedical Engineering

Background:

  • Hyperbranched polymers (HBPs) are globular nanopolymeric architectures with highly branched, three-dimensional structures.
  • They possess unique features including numerous terminal functional groups, spatial cavities, and convenient synthesis compared to linear or crosslinking polymers.
  • These properties make HBPs attractive for various applications, especially in biological and biomedical fields.

Purpose of the Study:

  • To review the significant progress and contributions of hyperbranched polymers (HBPs) in biological and biomedical applications.
  • To highlight the advantages of HBPs for designing and producing biomaterials.
  • To aid researchers in exploring the potential of HBPs for future bioapplications.

Main Methods:

  • This review synthesizes existing research on hyperbranched polymers (HBPs) and their bioapplications.
  • It focuses on the unique properties and synthetic advantages of HBPs.
  • The review analyzes the significance of HBPs in biological and biomedical systems and devices.

Main Results:

  • HBPs offer convenient, cost-effective synthesis via one-pot reactions.
  • Their numerous end-groups allow for functionalization, enabling tailored properties for biological applications.
  • HBPs exhibit excellent biocompatibility, biodegradability, controlled responsiveness, and capacity for incorporating guest molecules.

Conclusions:

  • Hyperbranched polymers (HBPs) present significant advantages for biomaterial development due to their versatile properties and ease of synthesis.
  • Their unique characteristics make them highly suitable for advanced biological and biomedical systems and devices.
  • Further exploration of HBPs is encouraged to unlock their full potential in various bioapplications.