polyamides

简明释义

英[ˌpɒliˈæmaɪdz]美[ˌpɑliˈæmaɪdz]

n. [高分子]聚酰胺（polyamide 的复数）

英英释义

单词用法

同义词

反义词

例句

1.A group of polyamides formed by the condensation between an amino group of one molecule and a carboxylic acid group of another.

一类由一个分子的氨基与另一个分子的羧酸基之间，缩合而生成的聚酰胺。

2.The high mechanical properties of impact modified polyamides bring benefits to applications as diverse as power tools or sports articles.

冲击改性聚酰胺的高机械性能使越来越多的电动工具或运动用品受益。

3.In the specific case of power tools, polyamides are used in housings where in combination with part designs they play a critical role in meeting structural and protective criteria.

在电动工具的具体应用中，聚酰胺是通常用于罩壳的原料，当与零部件设计相结合时，聚酰胺原料在满足结构及防护标准方面扮演了一个非常关键的角色。

4.The main variety, features and development situation of flame retardants for polyamides halogen-based flame retardants, halogen-free flame retardants and synegetic flame retardants were introduced.

介绍了聚酰胺用各种阻燃剂（素阻燃剂、卤阻燃剂和阻燃协效剂）主要品种、点、发现状。

5.The two most important synthetic polyamides are the urea-formaldehyde resins and the various forms of nylon.

两种最重要的合成聚酰胺是脲甲醛树脂和各种形式的尼龙。

6.Those polyamides used commercially are sufficiently stable to be spun from a melt.

这些商业用的聚酰胺在熔融纺丝过程中十分稳定。

7.Many sportswear brands prefer polyamides (聚酰胺) due to their moisture-wicking properties.

许多运动服品牌更喜欢使用聚酰胺（polyamides），因为它们具有吸湿排汗的特性。

8.In the automotive industry, polyamides (聚酰胺) are used for manufacturing lightweight parts.

在汽车工业中，聚酰胺（polyamides）被用于制造轻量化部件。

9.Engineers often select polyamides (聚酰胺) for high-performance engineering plastics.

工程师通常选择聚酰胺（polyamides）作为高性能工程塑料。

10.The production of textiles often involves the use of polyamides (聚酰胺) for their durability and flexibility.

纺织品的生产通常涉及使用聚酰胺（polyamides）以提高其耐用性和灵活性。

11.The chemical resistance of polyamides (聚酰胺) makes them suitable for various industrial applications.

由于聚酰胺（polyamides）具有良好的化学抗性，它们适用于多种工业应用。

作文

In the world of materials science, one of the most fascinating classes of polymers is known as polyamides. These versatile substances are characterized by the presence of amide linkages in their molecular structure. The most well-known example of polyamides is nylon, which has become a staple in various industries due to its strength and durability. The significance of polyamides extends far beyond their use in clothing; they play a crucial role in engineering, automotive, and aerospace applications as well.Polyamides are formed through the polymerization of monomers that contain both amine and carboxylic acid functional groups. This process results in long chains of repeating units that exhibit unique properties, such as high tensile strength and resistance to abrasion. The ability to tailor these properties by manipulating the molecular structure makes polyamides highly desirable for a wide range of applications.One of the key advantages of polyamides is their thermal stability. They can withstand high temperatures without losing their mechanical integrity, making them suitable for use in environments where other materials might fail. For instance, in the automotive industry, polyamides are often used for components that must endure extreme heat and stress, such as engine covers and fuel lines.Moreover, polyamides are known for their excellent chemical resistance. This property is particularly important in industries where exposure to harsh chemicals is common. For example, in the manufacturing of industrial equipment, polyamides can be utilized for seals and gaskets that need to maintain their performance under challenging conditions.Another remarkable characteristic of polyamides is their ability to absorb moisture. While this can sometimes be a disadvantage, it can also be beneficial in certain applications. For example, in textiles, the moisture-absorbing properties of polyamides can lead to improved comfort for the wearer, as it helps regulate body temperature and wick away sweat.The versatility of polyamides also extends to their processing methods. They can be molded, extruded, or spun into fibers, allowing for a variety of shapes and forms. This adaptability makes them suitable for everything from clothing and carpets to engineering components and consumer goods.Despite their many advantages, there are challenges associated with the use of polyamides. One of the primary concerns is their environmental impact. Traditional polyamides are derived from petroleum-based resources, raising questions about sustainability. However, advancements in technology have led to the development of bio-based polyamides, which are made from renewable resources and offer a more environmentally friendly alternative.In conclusion, polyamides represent a remarkable class of materials that have transformed various industries. Their unique properties, such as thermal stability, chemical resistance, and moisture absorption, make them indispensable in numerous applications. As research continues and sustainable alternatives emerge, the future of polyamides looks promising. Their ability to adapt and meet the demands of modern technology ensures that they will remain a vital component of material science for years to come.

在材料科学的世界中，一类最引人入胜的聚合物被称为聚酰胺。这些多功能物质的特征是它们的分子结构中存在酰胺键。最著名的聚酰胺例子是尼龙，由于其强度和耐用性，已成为各个行业的主食。聚酰胺的重要性远不止于它们在服装中的应用；它们在工程、汽车和航空航天等领域也发挥着至关重要的作用。聚酰胺通过聚合含有氨基和羧酸功能团的单体形成。这个过程产生了长链重复单元，展现出独特的性质，如高抗拉强度和耐磨损性。通过操控分子结构来调整这些特性，使得聚酰胺在各种应用中非常受欢迎。聚酰胺的一个主要优点是它们的热稳定性。它们能够在高温下保持机械完整性，非常适合用于其他材料可能失效的环境。例如，在汽车工业中，聚酰胺常用于需要承受极端热和压力的部件，如发动机盖和燃油管。此外，聚酰胺以其优秀的化学抵抗性而闻名。这一特性在暴露于严酷化学品的行业中特别重要。例如，在工业设备制造中，聚酰胺可用于密封件和垫圈，它们需要在困难条件下保持性能。聚酰胺的另一个显著特征是它们能够吸收水分。虽然这有时可能是一个缺点，但在某些应用中也可能是有利的。例如，在纺织品中，聚酰胺的吸湿特性可以提高穿着者的舒适度，因为它有助于调节体温并排汗。聚酰胺的多样性还扩展到它们的加工方法。它们可以被模塑、挤出或纺成纤维，允许多种形状和形式。这种适应性使它们适用于从服装和地毯到工程组件和消费品的各种产品。尽管有许多优点，但使用聚酰胺也面临挑战。主要问题之一是它们对环境的影响。传统的聚酰胺源自石油基资源，这引发了关于可持续性的问题。然而，技术的进步导致了生物基聚酰胺的发展，这些材料采用可再生资源制成，提供了更环保的替代方案。总之，聚酰胺代表了一类非凡的材料，已经改变了各个行业。它们独特的特性，如热稳定性、化学抵抗性和吸湿性，使它们在众多应用中不可或缺。随着研究的继续和可持续替代品的出现，聚酰胺的未来看起来充满希望。它们适应并满足现代技术需求的能力确保它们在未来多年仍将是材料科学的重要组成部分。