Linear Polymers
Linear Polymers - Related Videos
08:12
Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
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2022
Here, we describe protocols for the preparation of trans-cyclobutane fused cyclooctenes (tCBCO), their polymerization to prepare depolymerizable olefinic polymers, and the depolymerization of these polymers under mild conditions. Additionally, protocols for the preparation of depolymerizable networks and compression molding of rigid linear plastics based on this system are described.
08:44
Tension Tests of Polymers
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2023
Source: Roberto Leon, Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA Polymeric materials are widely used in civil structures, with uses ranging from very soft sealants to more rigid pipes in water and wastewater systems. The most basic definition of a polymer is a molecular structure with repeating subunits. The term polymer comes from Greek, where "poly" means many, and "-mer" means basic unit. Monomers, or single mers, are the specific repeating units. With...
06:35
Linearization of the Bradford Protein Assay
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Cited by 319 •
2010
The accuracy and sensitivity of protein determination by the rapid and convenient Bradford assay is compromised by intrinsic nonlinearity. We show a simple linearization procedure that greatly increases the accuracy, improves the sensitivity of the assay about 10-fold, and significantly reduces interference by detergents.
01:27
Linear Equations
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2025
Linear equations form the foundation of many algebraic and real-world applications, characterized by their simplicity and utility. A linear equation is an algebraic statement in which each term is either a constant or a product of a constant and a single variable. These equations represent straight lines when plotted on a Cartesian coordinate plane, reflecting a constant rate of change between two quantities.A typical linear equation in one variable has the form: ax + b = c, where a, b, and c...
01:17
Linear Circuits
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2024
A linear circuit is characterized by its output having a direct proportionality to its input, adhering to the linearity property, which encompasses the principles of homogeneity (scaling) and additivity. Homogeneity dictates that when the input, also referred to as the excitation, is multiplied by a constant factor, the output, known as the response, is correspondingly scaled by the same constant factor. For instance, if the current is multiplied by a constant 'k,' the voltage likewise...
FAQs
These are two routes for joining monomers through covalent bonds, and the selected route contributes to the resulting chain structure. Along with reaction conditions, polymerization mode affects chain length and molecular weight. Comparing the routes helps chemists relate synthesis choices to structural features such as crystallinity and entanglement, which influence strength, flexibility, melting behavior, and solubility.
Monomer functionality influences how many connections a monomer can make during polymerization. That connectivity affects whether the product develops extended chains and helps determine chain length and molecular weight. In chemistry, considering functionality alongside reaction conditions allows researchers to anticipate structural differences that can change the polymer’s physical behavior and suitability for a specific material application.
Crystallinity and entanglement are structural features that help determine how a polymer behaves. Their presence and extent are associated with changes in strength, flexibility, melting behavior, and solubility. This structure-property relationship explains why two materials formed from repeating monomer units can perform differently and why controlling molecular organization matters when designing plastics, fibers, films, or coatings.
A synthesis plan should account for the monomer’s functionality, the chosen polymerization route, and the reaction conditions. These factors influence chain length, molecular weight, crystallinity, and entanglement. After selecting suitable conditions, chemists can relate the resulting structural features to desired properties such as flexibility, strength, melting behavior, or solubility rather than treating composition alone as the design variable.
Useful comparisons include chain length, molecular weight, crystallinity, and the degree of chain entanglement. These characteristics provide a framework for interpreting differences in strength, flexibility, melting behavior, and solubility. Examining them together gives chemistry researchers a clearer connection between how a polymer formed and how it may perform as a plastic, fiber, film, coating, or laboratory material.
They are selected when extended chains can provide properties suited to a particular use. Depending on their structure, these materials can serve as plastics, fibers, films, coatings, or laboratory materials. Their importance in chemistry extends beyond synthesis because researchers use structure-property relationships to tailor performance and support the development of materials with improved recyclability.