WebIn polymers, there are covalent bonds between the atoms of the polymer, but the polymeric macromolecules (or chains) are kept together by Van der Waals forces. Of all the four types of bonds, Van der Waals is the weakest. For this reason, polymers are very elastic (e.g., a rubber band), can be easily melted, and have low strength. WebJul 29, 2024 · Polymeric materials play critical role in many current technologies. Among them, adaptive polymeric materials with dynamic (reversible) bonds exhibit unique …
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WebJun 26, 2024 · A monomer is a type of molecule that has the ability to chemically bond with other molecules in a long chain; a polymer is a chain of an unspecified number of … WebMay 25, 2024 · A polymer is a general term for any molecule that is a long string of smaller repeating parts formed by carbon-carbon bonds. The bonds can form long straight chains known as linear polymers, or parts can branch off from the chain, forming branched polymers. The polymers can also be cross-linked. theo van height
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WebMay 22, 2024 · For example, Palmans and Meijer used the benzene-1,3,5-tricarboxamide moiety to fold single-chain polymers by hydrogen bonding in both organic solvent and water. (11,49) Scherman reported supramolecularly cross-linked SCNPs obtained by preparing poly( N -hydroxyethylacrylamide) polymers with naphthalene- and viologen-containing … WebMay 28, 2024 · Introducing B–O bonds into traditional polymer networks can produce polymer materials with novel structures and unique properties. In particular, the higher … Web1 day ago · Polyamidoamine hydrogels prepared by the radical post-polymerization of α,ω-bisacrylamide-terminated M-AGM oligomers, in turn obtained by the polyaddition of 4-aminobutylguanidine with N,N’-methylenebisacrylamide, were reinforced with raw silk fibers, which can establish covalent bonds with the … theo van lexmond