非共价相互作用定义HTPB异构体的全球性质
Dipak Prasad1, Nilanjan Mitra1
1Hopkins Extreme Materials Institute and Department of Mechanical Engineering, Johns Hopkins University, Baltimore, Maryland 21218, United States.
The journal of physical chemistry. B
|August 15, 2024
概括
不同的基终结聚乙烯 (HTPB) 异构体由于非共价相互作用而表现出不同的热力学特性. 这一发现对于理解各种应用中的聚合物行为至关重要.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 计算化学计算化学
背景情况:
- 商用基终结聚乙烯 (HTPB) 存在于各种异构体形式 (cis, trans, vinyl).
- 这些HTPB异构体用于各种应用,包括火箭推进剂和汽车轮胎.
- 在不同的HTPB变体中观察到热力学性质的差异.
研究的目的:
- 研究HTPB异构体不同热力学性质背后的分子层次原因.
- 探索非共价相互作用在观察到的属性变化中的作用.
- 为更广泛的聚合物化学社区提供相关的见解.
主要方法:
- 用分子动力学模拟来研究两个特定的HTPB异构体.
- 分析的重点是聚合物链之间的非共价相互作用.
主要成果:
- 在两个研究的HTPB异构体之间观察到热力学反应的明显差异.
- 发现这些变异与异构体之间发生的非共价相互作用直接相关.
- 模拟数据揭示了影响材料行为的特定相互作用模式.
结论:
- 非共价相互作用是决定HTPB异构体的热力学特性的一个关键因素.
- 了解这些相互作用可以帮助预测和控制聚合物性能.
- 这些发现对为特定应用量身定制基于HTPB的材料有影响.
相关概念视频
Stereoisomerism
11.8K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
11.8K
Intermolecular Forces and Physical Properties
20.6K
20.6K
Comparing Intermolecular Forces: Melting Point, Boiling Point, and Miscibility
44.2K
Intermolecular forces are attractive forces that exist between molecules. They dictate several bulk properties, such as melting points, boiling points, and solubilities (miscibilities) of substances. Molar mass, molecular shape, and polarity affect the strength of different intermolecular forces, which influence the magnitude of physical properties across a family of molecules.
Temporary attractive forces like dispersion are present in all molecules, whether they are polar or nonpolar. They...
Temporary attractive forces like dispersion are present in all molecules, whether they are polar or nonpolar. They...
44.2K
Noncovalent Attractions in Biomolecules
49.7K
Noncovalent attractions are associations within and between molecules that influence the shape and structural stability of complexes. These interactions differ from covalent bonding in that they do not involve sharing of electrons.
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
49.7K
Intermolecular Forces
58.0K
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...
58.0K
Structural Isomerism
19.1K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
19.1K


