超分子共聚物:理论建模揭示的结构和组成
Anindita Das1,2, Ghislaine Vantomme1,2, Albert J Markvoort2,3
1Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology , P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
Journal of the American Chemical Society
|May 10, 2017
概括
这项研究揭示了-1,3,5-三胺 (BTA) 单体中的微妙结构差异如何影响高分子共聚物形成. 这项研究揭示了单体组成如何决定共聚合物结构和特性,并提供了对非共价聚合物组合的见解.
科学领域:
- 超分子化学
- 聚合物科学
- 材料科学
背景情况:
- 超分子共聚物是合成聚合物的非共价类型,形成机制尚不清楚.
- 控制高分子共聚物的组成和长度对于它们的应用至关重要.
- -1,3,5-三胺 (BTA) 单体为研究超分子组合提供了多功能平台.
研究的目的:
- 解开两个结构不同的BTA单体之间的超分子共聚化机制.
- 研究单体结构和组成对共聚物的形成和特性的影响.
- 开发一个理论模型来量化超分子共聚物中的热力学参数和物种分布.
主要方法:
- 结合实验方法,包括使用"中士和士兵"方法的循环二重化 (CD) 光谱.
- 实验数据的理论建模和数学分析.
- 研究了基-BTA和寡二甲基 (oDMSi) -BTA单体的同聚化机制.
主要成果:
- 在混合阿奇拉和奇拉BTA单体时观察到意想不到的奇拉诱导.
- 证明了不同的同聚合机制:基BTA的合作性和oDMSi-BTA的异构性.
- 显示单体组成决定了共聚物螺旋性和物种分布,在低 (<10 mol%) 和高 (>25 mol%) oDMSi-BTA 分数时具有不同的行为.
结论:
- 在BTA单体中微妙的结构差异显著影响了超分子共聚化.
- 开发的理论模型准确地量化了热力学参数和物种分布.
- 这项工作提供了对超分子共聚物形成的基本理解,为设计新型非共价聚合物铺平了道路.
相关概念视频
Characteristics and Nomenclature of Copolymers
3.5K
Copolymers are the products obtained from the polymerization of multiple monomer species. So, in a polymer chain itself, there can be multiple repeating units that come from different monomers. The process of synthesizing a polymer from different monomer species is called copolymerization. When two monomers are involved, the polymer is known as a bipolymer. Polymers with three and four monomers are termed terpolymers and quaterpolymers, respectively. Figure 1 depicts the copolymerization of...
3.5K
Polymers: Molecular Weight Distribution
5.0K
For any given polymer, the weight average molecular weight (Mw) is higher than, if not equal to, the number average molecular weight (Mn). The only situation in which the weight average molecular weight and the number average molecular weight are equal is when a polymer consists only of chains with equal molecular weight. However, this never happens in a synthetic polymer, since it is difficult to control the polymerization process up to a molecular level with accuracy to a hundred percent.
5.0K
Polymers
42.0K
The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
42.0K
Molecular Models
44.2K
Physical models representing molecular architectures of chemical compounds play essential roles in understanding chemistry. The use of molecular models makes it easier to visualize the structures and shapes of atoms and molecules.
44.2K
Polymer Classification: Crystallinity
4.1K
Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
4.1K
Characteristics and Nomenclature of Homopolymers
4.2K
Polymers that are made up of identical monomer units are called homopolymers. Only one repeating unit is involved in the construction of the homopolymer structure. For example, as depicted in Figure 1, polypropylene is a homopolymer constituted of propylene monomers. Here, the only repeating unit in the polymer chain is propylene.
4.2K


