elastomers are hydrophilic or hydrophobic?
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 Silicone elastomers are inherently hydrophobic material - a characteristic which can cause imperfections in impressions if the area to be recorded are not thoroughly dried.
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What term is used to describe the exclusion of nonpolar substances from an aqueous solution? The hydrophobic effect is due largely to entropy changes in the solvent water. Ionic or electrostatic interactions occur between two groups of opposite charge. Hydrophobic or nonpolar substances are insoluble in water.
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Lesson Summary Hydrophilic molecules are molecules that can dissolve in water. These molecules must have a charge (positive or negative) in order to interact with water, which is polar. Meaning that the molecule has a partially positive side and a partially negative side.
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A phospholipid is an amphipathic molecule which means it has both a hydrophobic and a hydrophilic component. ... The lipid tails, on the other hand, are uncharged, nonpolar, and hydrophobic, or “water fearing.” A hydrophobic molecule repels and is repelled by water.
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Oleophilic refers to materials that "love" oil. These materials are water insoluble and therefore are hydrophobic. In a simple two- dimensional world of just oil and water, any material that "loves" oil "hates" water. In this simple world, oleophilic and hydrophobic describe one type of molecule.
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Rubber-like solids with elastic properties are called elastomers. Polymer chains are held together in these materials by relatively weak intermolecular bonds, which permit the polymers to stretch in response to macroscopic stresses. Natural rubber, neoprene rubber, buna-s and buna-n are all examples of such elastomers.
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Shock absorbing materials may also be called shock absorbing polymers, visco-elastic polymers, visco polymers or simply polymers. There are many other shock absorbent materials available like rubber, neoprene, silicone, etc. but for our purposes here we'll discuss polymer and Sorbothane specifically.
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The chemical properties of polymer discussed here include chemical resistance, chemical permeation, and weather resistance. The major component of the polymer is hydrocarbon which results in hydrophobic property in general. They are usually resistant to polar solvent but will be attacked by nonpolar solvent.
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PVC is a hydrophobic polymer and therefore many research studies were conducted in order to increase the hydrophilicity of the surface by chemical modification in order to improve biocompatibility, to enhance wettability, reduce friction or to make lubricious or antimicrobial coatings.
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Alcohols. Hydroxyl groups (-OH), found in alcohols, are polar and therefore hydrophilic (water liking) but their carbon chain portion is non-polar which make them hydrophobic. The molecule increasingly becomes overall more nonpolar and therefore less soluble in the polar water as the carbon chain becomes longer.
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This term arises because hydrophobic molecules do not dissolve in water. If a molecule has areas where there is a partial positive or negative charge, it is called polar, or hydrophilic (Greek for "water-loving"). ... Some examples of polar covalent bonds often found in biological molecules include C-O, C-N and O-H bonds.
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Lipids are a large and diverse class of biological molecules marked by their being hydrophobic, or unable to dissolve in water. The hydrophobic nature of lipids stems from the many nonpolar covalent bonds. Water, on the other hand, has polar covalent bonds and mixes well only with other polar or charged compounds.
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Hydrophobic is often used interchangeably with "oily" or lipophilic". Examples of hydrophobic molecules include the alkanes, oils, fats and greasy substances in general.
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In a paper towel, there are no tubes, but the liquid has a tendency to adhere to the thin plant fibers, and it is drawn up through the voids between the fibers just the same. Why do paper towels absorb oil, as oil is hydrophobic and cellulose is hydrophilic?
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The hydrophobic amino acids include alanine (Ala, A), valine (Val, V), leucine (Leu, L), isoleucine (Ile, I), proline (Pro, P), phenylalanine (Phe, F) and cysteine (Cys).
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Yes, all polar molecules are hydrophilic. Polar molecules are those which have a charge, but they differ from ions (which also carry a charge) in that polar molecules are dipoles. ... The water molecule is a polar molecule; hence, other substances with the weak hydrogen bond will dissolve in water.
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Non-Polar Hydrophobic Amino Acids. Hydrophobic, as the name implies is hydro – water, phobic – fearing. Hydrophobic amino acids have little or no polarity in their side chains. The lack of polarity means they have no way to interact with highly polar water molecules, making them water fearing.