.png){kind=icon}
返回
Temperature-Dependent Chain Structures during Solution-Grown Crystallization via Atomic Force Microscopy
.png){kind=icon}
OA
AI
DOI：10.1002/marc.202500842.png)
.png){kind=icon}
.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
Semi-crystalline polymers are widely utilized due to their favorable cost, and their crystallization behavior is significantly influenced by crystallization temperature. In this study, we employed AFM-based SMFS (single-molecule force spectroscopy) to investigate single-chain folding structures in Polyethylene Oxide (PEO) at various crystallization temperatures (Tc) to elucidate the temperature effect. We utilized force-volume (FV) mode for SMFS, which enables the measurement of single-chain information while simultaneously obtaining information about the surface morphology of the crystal. By comparing the morphological changes before and after SMFS, we can locate the position of the stretched single chain and observe the morphological changes after the single chain is stretched. Combined with the force-extension curves of a single polymer chain, we can infer information about the 3D structure of the molecular chains and the interchain structure in the crystal. Morphological and molecular-level structural data show that intermediate structures are more likely to form at low temperatures, while adjacent reentry structures form at high temperatures. Interestingly, temperature does not affect the degree of chain folding, i.e., the number of adjacent reentry folds. However, the aggregation structures formed by chain folding differ due to changes in surface free energy. This provides a new method for studying the structural changes of a single chain during polymer crystallization.
Keyword:
chain structure
crystallization mechanism
single polymer chain
single-molecule force spectroscopy
AI总结
对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。
期刊
IF:
4.3
论文数:
8.5K
被引数:
1.6W
机构
引用论文
Unfolding of a Single Polymer Chain from the Single Crystal by Air-Phase Single-Molecule Force Spectroscopy: Toward Better Force Precision and More Accurate Description of Molecular Behaviors.png)
MACROMOLECULES
MACROMOLECULESIF5.2
PREAI
分享收藏Determination of Chain-Folding Structure of Isotactic Polypropylene in Melt-Grown α Crystals by 13C-13C Double Quantum NMR and Selective Isotopic LabelingMACROMOLECULES
MACROMOLECULESIF5.2
PREAI
分享收藏
分享收藏分享收藏Study of the Dynamic Viscoelasticity of Single Poly(N-isopropylacrylamide) Chains Using Atomic Force MicroscopyMACROMOLECULES
MACROMOLECULESIF5.2
PREAI
分享收藏In Situ Real-Time Observation of Polymer Folded-Chain Crystallization by Atomic Force Microscopy at the Molecular LevelMACROMOLECULES
MACROMOLECULESIF5.2
PREAI
分享收藏
查看更多内容