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Updated: Jun 7, 2025

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level
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分散化的聚合物链的动力学:从粗粒度分子动力学模拟的见解

Taofeek Tejuosho1, Sohil Kollipara2, Sumant Patankar1

  • 1Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611, United States.

The journal of physical chemistry. B
|November 14, 2024
PubMed
概括

合成聚合物的特性取决于链条长度分布,或分散度 (Đ). 这项研究揭示了分散性如何影响聚合物化动态,显示较长的链条变得更灵活,分散性更高.

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Polymer Classification: Crystallinity

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.
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Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
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Polymers: Molecular Weight Distribution

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.
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