isotactic

简明释义

英[ˌaɪsəʊˈtæktɪk]美[aɪsoʊˈtæktɪk]

adj. [有化] 全同立构的，等规立构的

英英释义

单词用法

同义词

反义词

例句

1.Polyacetaldehyde may exist in atactic, syndiotactic and isotactic forms.

聚乙醛可以以无规，间同和全同形式存在。

2.The rheological behavior of low isotactic polypropylene (LIPP) was investigated.

本文研究了低等规度聚丙烯(LIPP)的流变性能。

3.Hard elastic polypropylene fibre samples were made by melt spinning isotactic polypropylene with melt indexer, followed by fast winding and annealing.

将聚丙烯树脂在熔融指数仪上熔融挤出、快速牵伸并退火处理，制得了硬弹性聚丙烯纤维。

4.This paper analyzed the microstructure and properties of the low isotactic polypropylene (LIPP) prepared with the homemade low isotactic catalyst.

采用低等规聚丙烯(LIPP)催化剂制得LIPP，并测定其微观结构和性能。

5.Hard elastic polypropylene fibre samples were made by melt spinning isotactic polypropylene with melt indexer, followed by fast winding and annealing.

将聚丙烯树脂在熔融指数仪上熔融挤出、快速牵伸并退火处理，制得了硬弹性聚丙烯纤维。

6.BOPP physics performance can be mainly decided by molecular weight, molecular weight distribute and isotactic of resin.

BOPP产品的物理性能主要由树脂的分子量、等规度、分子量分布这三个基本物性决定。

7.The polymer's structure was classified as isotactic, meaning all the methyl groups were aligned on the same side.

该聚合物的结构被归类为等规，意味着所有的甲基在同一侧对齐。

8.Researchers found that isotactic polystyrene exhibits better thermal stability than atactic forms.

研究人员发现，等规聚苯乙烯表现出比无规形式更好的热稳定性。

9.When studying crystallization, scientists often focus on the isotactic variants of the material.

在研究结晶过程时，科学家们通常关注材料的等规变体。

10.In the production of polypropylene, isotactic configurations lead to higher crystallinity.

在聚丙烯的生产中，等规构型会导致更高的结晶度。

11.The isotactic nature of the polymer contributes to its mechanical strength.

聚合物的等规特性有助于其机械强度。

作文

The term isotactic refers to a specific type of polymer configuration where all the substituent groups are arranged in a regular pattern along the polymer chain. This structural characteristic plays a crucial role in determining the physical properties of the material. For instance, isotactic polypropylene is a widely used thermoplastic that exhibits excellent strength and clarity due to its highly ordered molecular structure. The isotactic arrangement allows for tighter packing of the polymer chains, resulting in enhanced crystallinity. In the world of materials science, understanding the implications of isotactic configurations can lead to significant advancements in the development of new materials. Researchers are constantly exploring how different stereochemical arrangements affect the behavior of polymers under various conditions. For example, while isotactic polymers tend to have higher melting points and greater tensile strength, atactic polymers, which have a random arrangement of substituents, may offer more flexibility but at the cost of mechanical strength.This dichotomy between isotactic and atactic forms illustrates the importance of molecular orientation in polymer chemistry. In practical applications, manufacturers might choose isotactic polymers for products requiring rigidity and durability, such as automotive parts or packaging materials, whereas atactic forms may be preferred in applications where flexibility is paramount, such as in adhesives or coatings.Moreover, the synthesis of isotactic polymers often involves specific catalysts that facilitate the formation of the desired stereochemistry. Ziegler-Natta catalysts, for example, are commonly employed in the production of isotactic polypropylene, enabling the precise control of the polymerization process to achieve the desired molecular architecture.The study of isotactic polymers extends beyond mere academic interest; it has real-world implications that affect industries ranging from packaging to automotive manufacturing. As technology progresses, the ability to manipulate the stereochemistry of polymers opens new avenues for innovation. For instance, researchers are investigating how isotactic configurations can improve the biodegradability of certain plastics, addressing environmental concerns associated with traditional petroleum-based materials.In conclusion, the concept of isotactic polymers is fundamental in the field of polymer science. Its influence on the properties and applications of materials cannot be overstated. As we continue to explore the intricacies of polymer chemistry, the significance of isotactic structures will undoubtedly remain a focal point for future research and development, leading to more sustainable and efficient materials that can meet the demands of modern society.

术语isotactic指的是一种特定类型的聚合物配置，其中所有取代基沿聚合物链以规则的模式排列。这种结构特征在决定材料的物理性质方面起着至关重要的作用。例如，等规聚丙烯是一种广泛使用的热塑性材料，由于其高度有序的分子结构，表现出优异的强度和清晰度。isotactic排列允许聚合物链更紧密地堆积，从而提高结晶度。在材料科学的世界中，理解isotactic配置的影响可以带来新材料开发的重要进展。研究人员不断探索不同立体化学排列如何影响聚合物在各种条件下的行为。例如，虽然isotactic聚合物往往具有更高的熔点和更大的拉伸强度，但无规聚合物（即取代基随机排列的聚合物）可能提供更多的灵活性，但牺牲了机械强度。这种isotactic和无规形式之间的二分法说明了分子取向在聚合物化学中的重要性。在实际应用中，制造商可能会选择isotactic聚合物用于需要刚性和耐用性的产品，例如汽车零部件或包装材料，而无规形式则可能在需要灵活性的应用中更为合适，例如在粘合剂或涂料中。此外，合成isotactic聚合物通常涉及特定的催化剂，以促进所需立体化学的形成。例如，齐格勒-纳塔催化剂通常用于生产isotactic聚丙烯，使聚合过程的精确控制成为可能，以实现所需的分子结构。对isotactic聚合物的研究超越了单纯的学术兴趣；它具有影响从包装到汽车制造等行业的现实世界意义。随着技术的进步，操控聚合物的立体化学能力为创新开辟了新的途径。例如，研究人员正在调查如何改善某些塑料的生物降解性，以解决传统石油基材料相关的环境问题。总之，isotactic聚合物的概念在聚合物科学领域是基础性的。它对材料的性质和应用的影响不容小觑。随着我们继续探索聚合物化学的复杂性，isotactic结构的重要性无疑将继续成为未来研究和发展的重点，导致更可持续和高效的材料，以满足现代社会的需求。