Basic Polymer Structure | MATSE 81: Materials In Today's World
网页Diagrams of linear, branched, crosslinked, and networked polymer structures. Credit: Adapted from Fig. 4.7, Callister & Rethwisch 5e. Linear polymers resemble ‘spaghetti’ with long chains.
30.6: Polymer Structure and Physical Properties
网页To account for the physical differences between the different types of polymers, the nature of the aggregate macromolecular structure, or morphology, of each substance must be considered. Because polymer molecules are so large, they generally pack together in a non-uniform fashion, with ordered or crystalline-like regions, called crystallites ...
Polymer - Wikipedia
网页Polymers range from familiar synthetic plastics such as polystyrene to natural biopolymers such as DNA and proteins that are fundamental to biological structure and function. Polymers, both natural and synthetic, are created via polymerization of many small molecules, known as monomers.
网页A polymer is a macromolecule (long molecules) built of small covalently bonded units called monomers (“mer” from the Greek word meros meaning part). These small units are repeated throughout the macromolecule chain. The macromolecules are bonded together by weak Van der Waals and hydrogen (secondary) bonds, or additional covalent cross-links.
31.8: Polymer Structure and Physical Properties
网页5 天之前 · Much of the art in polymer synthesis lies in finding methods for controlling the degree of crystallinity and the glass transition temperature, thereby imparting useful properties to the polymer. In general, polymers can be divided into four major categories, depending on their physical behavior: thermoplastics, fibers, elastomers, and ...
Polymer Structure - an overview | ScienceDirect Topics
网页Polymers are materials that consist of many, thousands, of repeating units. Polymer structure is in general used because of their lightness, elasticity, and process ability [6,7]. These structures, usually, show a lesser amount of mechanical properties such as low strength and low stretch modulus as compared with metals and ceramics.
31.7 Polymer Structure and Physical Properties - OpenStax
网页Much of the art in polymer synthesis lies in finding methods for controlling the degree of crystallinity and the glass transition temperature, thereby imparting useful properties to the polymer. In general, polymers can be divided into four major categories, depending on their physical behavior: thermoplastics, fibers, elastomers, and ...
16.7: Polymers - Chemistry LibreTexts
网页2022年9月23日 · Polymers are long molecules composed of chains of units called monomers. Several important biological polymers include proteins, starch, cellulose, and DNA.
28. Polymers: Structure & Composition - MIT OpenCourseWare
网页Describe a polymer’s structure in terms of –mer type ordering, tacticity, and backbone chain configuration. Explain how polymer structure determines material properties, such as flexibility or transparency. Explain how crosslinking produces the characteristic properties of …
Polymers - Michigan State University
网页A general diagram illustrating this assembly of linear macromolecules, which supports the name chain growth polymers, is presented here. Since a pi-bond in the monomer is converted to a sigma-bond in the polymer, the polymerization reaction is usually exothermic by 8 to 20 kcal/mol.
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