WebMay 1, 2024 · The experimental data for the DA cross-linking reaction show a more steep increase in cross-link density over time at higher temperatures and ultimately a lower cross-link density at their equilibrium plateau. Although the predicted data for these reactions follow these initial trends, they increasingly deviate from the experimental data … WebInitially, after the novolak has melted, and the cross linking reactions have commenced, the increase in molecular weight (one cross link will double the molecular weight) leads to a phase separation as the higher molecular weight polymer becomes insoluble in …
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WebJan 28, 2024 · The cross-linking of this functional group between the chains makes hydrogels insoluble in water. On the basis of their swelling ability, hydrogels are categorized according to pore size. Hydrogels can be categorized as (a) non-porous, (b) micro-porous, or (c) super-porous. In non-porous hydrogels, swelling occurs through diffusion only. WebCross-reaction. A reaction that occurs in blood testing when a disease agent reacts to the specific antibody for another disease agent. Cross-reactions are common in blood tests … frank holztransporte lorch
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WebApr 12, 2024 · The internal crosslinking modification of waterborne polyurethane mainly focuses on the use of alcohols , as fewer researches on the amine internal cross-linking agent for PU, probably due to the fast reaction between the amine and the isocyanate groups. Therefore, it is of great interest to prepare amine cross-linked water-borne … WebApr 8, 2024 · EmojiMart for Reactions and cross-platform compatibility. ... Insert Link. Link Text. URL. Add Add a link, Add a bulleted list, Add a numbered list, Add a task list, Directly mention a user or team Reference an issue or pull request. Cross-links can be formed by chemical reactions that are initiated by heat, pressure, change in pH, or irradiation. For example, mixing of an unpolymerized or partially polymerized resin with specific chemicals called crosslinking reagents results in a chemical reaction that forms cross-links. See more In chemistry and biology a cross-link is a bond or a short sequence of bonds that links one polymer chain to another. These links may take the form of covalent bonds or ionic bonds and the polymers can be either synthetic … See more Proteins naturally present in the body can contain crosslinks generated by enzyme-catalyzed or spontaneous reactions. Such crosslinks are … See more Crosslinking is often measured by swelling tests. The crosslinked sample is placed into a good solvent at a specific temperature, and either the change in mass or the change in volume is measured. The more crosslinking, the less swelling is … See more • Application note on how to measure degree of crosslinking in plastics See more Crosslinking is the general term for the process of forming covalent bonds or relatively short sequences of chemical bonds to join two polymer chains together. The term See more Wide usage of the term cross-linking is also described as vulcanization in material science and engineering, mainly addressing the fast reaction between monomers and polymers and branches of rubber. Cross-linking or interlinking m of polymers can … See more • Branching (polymer chemistry) • Cross-linked enzyme aggregate • Cross-linked polyethylene (PEX) See more frank holzenthal rothenbach