计算溶液所需的质量、体积或浓度。
| 活性类型 | Relation | Activity value | Units | Action Type | 期刊 | PubMed Id | doi | Assay Aladdin ID |
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,适用于对基线干扰要求严格的色谱和分析工作流程。
室温。常规运输 。请查阅批次 COA 获取详细规格。
SDS、COA、产品数据表及规格说明书均可下载。可通过批号查询获取批次 COA。
在色谱分析、有机合成和交叉偶联反应领域已被 4848 篇同行评审文献引用。
在200℃时软化而分解。商品因存在各种乙酰基残留物,故不同的粘度和特性。能溶于水,不溶于石油溶剂。 聚乙烯醇是白色粒状的水溶性合成树脂。化学名称为Polyvinyl alcohol,简称PVA。 聚乙烯醇的主要性质是由构成树脂的分子的醇解度和聚合度而定的,其性质如下: ① 水溶性:易溶于水,不溶于几乎所有的有机溶剂。溶解速度随水温的增高而加快。 ② 水溶液的粘度:聚乙烯醇水溶液的粘度比其他水溶性高分子低。根据聚合度,浓度和温度的变化而变化。 ③ 造膜性:聚乙烯醇的水溶液容易成膜。其皮膜有抗拉强度和耐磨强度等物理性能,超过其他的合成树脂。 ④ 吸湿性:聚乙烯醇的吸湿性比其他的水溶性高分子低,受湿度的影响比较少。 ⑤ 耐药品耐油性:在弱酸弱碱的条件下,基本上不受影响。另外,也具有优越的耐油性。接合剂及成层剂,织物,纸张上浆剂,增厚剂和稳定剂,乳化剂。
It softens and decomposes at 200℃. Due to the presence of various acetyl group residues in the product, it has different viscosities and properties. It is soluble in water but insoluble in petroleum solvents. Polyvinyl alcohol is a white granular water-soluble synthetic resin. Its chemical name is Polyvinyl alcohol, abbreviated as PVA. The main properties of polyvinyl alcohol are determined by the alcohol degree and polymerization degree of the molecules that constitute the resin. The properties are as follows: ① Water solubility: It is easily soluble in water and insoluble in almost all organic solvents. The dissolution rate increases with the increase of water temperature. ② Viscosity of the aqueous solution: The viscosity of the polyvinyl alcohol aqueous solution is lower than that of other water-soluble polymers. It varies according to the polymerization degree, concentration and temperature. ③ Film-forming property: The aqueous solution of polyvinyl alcohol is easy to form a film. The film has physical properties such as tensile strength and wear resistance, which are superior to other synthetic resins. ④ Hygroscopicity: The hygroscopicity of polyvinyl alcohol is lower than that of other water-soluble polymers, and it is less affected by humidity. ⑤ Resistance to chemicals and oil: It is basically unaffected in weak acids and weak bases. In addition, it also has excellent oil resistance.
分类树(Taxonomy Tree)
| 界(kingdom) | 有机化合物 |
|---|---|
| 超类(Superclass) | 有机氧化合物 |
| 类(Class) | 有机氧化合物 |
| 亚类(Subclass) | 烯醇 |
| 中间层级节点(Intermediate Tree Nodes) | 暂无 |
| 直接上位类(Direct Parent) | 烯醇 |
| 其他上位类(Alternative Parents) | 碳氢化合物衍生物 |
| 分子骨架(Molecular Framework) | 脂肪族无环化合物 |
| 取代基(Substituents) | 脂肪族非环化合物 - 乙烯醇 - 烃衍生物 |
| 描述(Description) | 该化合物属于烯醇类有机化合物。这类化合物含有烯醇官能团,结构为HO(R)C=CR'。含一个或多个α-氢原子的酮会发生酮-烯醇互变异构,其互变异构体即为烯醇。 |
| 外部描述符(External Descriptors) | 暂无 |
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