| 词汇 | polymer |
| 释义 | polymer noun[ C ] chemistry specializeduk /ˈpɒl.ɪ.mər/ us /ˈpɑː.lɪ.mɚ/ a chemical substance consisting of large molecules made from many smaller and simpler molecules: 聚合物，聚合体 Many polymers, such as nylon, are artificial.许多聚合物是人造的，比如说尼龙。 Proteins and DNA are natural polymers.蛋白质和脱氧核糖核酸都是天然聚合体。 Chemistry: types of chemical acid salt aerogel albumin alkali metal alkaline alkaloid antioxidant carbohydrate coolant homologous series inorganic isopropanol ketone lectin melamine monosaccharide mothball propellant saline weak base polymer | American Dictionarypolymer noun[ C ] us/ˈpɑl·ə·mər/ chemistry a natural or artificial substance made from many smaller molecules (= groups of combined atoms) Examples of polymerpolymer These solutions provide qualitative insight for the process of secondary oil recovery if the polymer concentration of liquid injected into the reservoir varies with time. As a result, the polymer-induced stresses are never large. Polymer solutions were injected through flush-mounted, angled slots located in both of the 57.5 cm walls of the channel. These mannose polymers are a form of storage carbohydrate that is mobilized following germination. Figure 13 shows the mean velocity profiles for x-locations between 25 and 200 mm downstream of the injectors during polymer injection. In particular, for a flexible polymer, equations that only consider entropic contributions to mechanical properties are often useful approximations. A ramp-filling procedure applied to filling polymer and glass shell with highly pressurized hydrogens. If liquid paint with volatile solvent is deposited on a substrate, we can assume that initially the polymer is dissolved and unstressed. The targeting ligand is covalently coupled to the drug, making the efficiency of drug loading and uptake comparatively lower than in polymer- drug conjugates. This model accounts for the empirical observation that at high shears polymers align and slide more easily than at low shears. There appears to be no correlation between the fitted relaxation time and the polymer or salt concentrations, as observed in shear rheology measurements. The figure on the right shows iso-density contours of the amphiphilic polymers. His study suggested that hydration-induced configurational changes in seed polymer matrices might not be fully recovered upon re-drying. Biological polymers such as a polypeptide chain are heteropolymers where each segment is different. In larger proteins, the inside and outside behave as polymer melts with constraints on the interface, and there is a significant amount of entropy left. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. Collocations withpolymerpolymerThese are words often used in combination with polymer. Click on a collocation to see more examples of it. acrylic polymer Acrylic paint's binder is acrylicpolymer emulsion; as this binder dries the paint remains flexible. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. biodegradable polymer Coating paper with a biodegradablepolymer on both sides or on the underside also considerably decreased the rate of degradation14,15. liquid polymer For example, a liquidpolymer (where the chains are freely flowing) can be turned into a solid or gel by cross-linking the chains together. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. See all collocations with polymer |
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