Homopolymers
Homopolymers - Related Videos
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Characteristics and Nomenclature of Homopolymers
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2023
Polymers that are made up of identical monomer units are called homopolymers. Only one repeating unit is involved in the construction of the homopolymer structure. For example, as depicted in Figure 1, polypropylene is a homopolymer constituted of propylene monomers. Here, the only repeating unit in the polymer chain is propylene. Figure 1: Propylene homopolymerization to polypropylene. The chemical name of a homopolymer is generated by using the name of its monomer with a prefix ‘poly’. For...
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Polymers
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2020
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 properties that they exhibit. Additionally,...
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Facile Synthesis of Worm-like Micelles by Visible Light Mediated Dispersion Polymerization Using Photoredox Catalyst
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Cited by 5 •
2016
This article describes a process for producing polymeric self-assembled nanoparticles using visible light mediated dispersion polymerization. Using low energy visible light to control the polymerization allows for the reproducible formation of self-assembled worm-like micelles at high solids content.
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Gel-Clot Limulus Amoebocyte Lysate Assay: A Method for Bacterial Endotoxin Detection in Nanoparticle Formulations
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2025
This video describes a gel-clot assay to determine the presence of bacterial endotoxins in nano-formulations using Limulus Amoebocyte Lysate derived from the blood cells of horseshoe crabs. The assay helps test for endotoxin contamination of pharmaceutical products, including nano-based formulations.
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Macromolecules - Concepts
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2019
Biomolecules Organisms contain a wide variety of organic molecules with numerous functions which depend on the chemical structures and properties of these molecules. All organic molecules contain a carbon backbone and hydrogen atoms. The carbon atom is central in the formation of a vast variety of organic molecules ranging in size, shape and complexity; inorganic molecules on the other hand, generally have simpler structures. The outermost shell of a free carbon atom can accommodate eight...
FAQs
Chain-growth and step-growth polymerization connect monomer molecules through different reaction patterns, which affects how a polymer chain develops. Chain-growth reactions build a chain through successive additions, whereas step-growth reactions join molecules through progressive bond formation. Comparing these routes helps chemists interpret differences in molecular weight and material behavior while recognizing the central role of covalent bonding.
Molecular weight, branching, and crystallinity are key structural variables because they connect chain architecture to performance. Molecular weight describes the scale of the polymer molecules, branching alters chain arrangement, and crystallinity provides another structural factor affecting behavior. Together, these features help explain changes in strength, flexibility, and thermal behavior when chemists evaluate a homopolymer.
Homopolymers provide a simpler foundation for relating one repeating-unit structure to material properties. This makes it easier to examine how molecular weight, branching, and crystallinity influence performance before analyzing systems containing different monomer types. Chemists can therefore use homopolymer behavior as a reference point when studying the greater structural and property complexity of copolymers.
A basic study begins by selecting a monomer and carrying out polymerization through either a chain-growth or step-growth route that creates covalent bonds. Chemists then consider the resulting molecular weight, branching, crystallinity, and material properties. This workflow connects reaction choice with molecular structure and helps explain observed strength, flexibility, and thermal behavior.
Polyethylene, polystyrene, and poly(vinyl chloride) demonstrate the practical range of common homopolymers. Materials based on these examples support packaging, household products, and construction materials. Their use illustrates why chemists connect polymer structure with strength, flexibility, and thermal behavior: those properties help determine how a material performs in different product and industrial settings.
They give chemists a foundation for examining how repeating molecular structure relates to measurable material behavior. By comparing molecular weight, branching, and crystallinity with strength, flexibility, and thermal response, researchers can organize polymer synthesis around specific performance goals. This structure-property framework also supports the later design and interpretation of more complex polymer systems.