ArticleJournal of the American Chemical Society2020
Correlated X-ray Ptychography and Fluorescence Nano-Tomography on the Fragmentation Behavior of an Individual Catalyst Particle during the Early Stages of Olefin Polymerization.
Article in Journal of the American Chemical Society, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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Who cites it
14 citing papers in PubMed.
- Quantifying Trace Metals in Gunflint Microfossils by 3D Correlative X-ray Nanoimaging.Analytical chemistry · 2026Article
- Nanoscale Chemical Analysis of Heterogeneous Catalysts Using Tip-Enhanced Raman Spectroscopy.Chemical reviews · 2026Review
- High-resolution ptychographic nanoimaging under high pressure with X-ray beam scanning.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- In-Situ Thermometry Reveals Fragmentation Behavior Based on Local Temperature in α-Olefin Polymerization Catalysts.Journal of the American Chemical Society · 2025Article
- Correlated x-ray fluorescence and ptychographic nano-tomography on Rembrandt'sScience advances · 2023Article
- Nanoscale chemical imaging with structured X-ray illumination.Proceedings of the National Academy of Sciences of the United States of America · 2023Article
- Advancing the Compositional Analysis of Olefin Polymerization Catalysts with High-Throughput Fluorescence Microscopy.Journal of the American Chemical Society · 2022Article
- A combined experimental and molecular simulation study on stress generation phenomena during the Ziegler-Natta polyethylene catalyst fragmentation process.Nanoscale advances · 2022Article
- Evolution of Hierarchically Porous Nickel Alumina Catalysts Studied by X-Ray Ptychography.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2022Article
- The concept of active site in heterogeneous catalysis.Nature reviews. Chemistry · 2022Review
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- Visualizing defects and pore connectivity within metal-organic frameworks by X-ray transmission tomography.Chemical science · 2021Article
- An ultrahigh-resolution soft x-ray microscope for quantitative analysis of chemically heterogeneous nanomaterials.Science advances · 2020Article
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Authors and funding
8 authors.
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Abstract
A combination of X-ray ptychography and X-ray fluorescence tomography (XRF) has been used to study the fragmentation behavior of an individual Ziegler-Natta catalyst particle, ∼40 μm in diameter, in the early stages of propylene polymerization with submicron spatial resolution. The electron density signal obtained from X-ray ptychography gives the composite phases of the Ziegler-Natta catalyst particle fragments and isotactic polypropylene, while 3-D XRF visualizes multiple isolated clusters, rich in Ti, of several microns in size. The radial distribution of Ti species throughout the polymer-catalyst composite particle shows that the continuous bisection fragmentation model is the main contributor to the fragmentation pathway of the catalyst particle as a whole. Furthermore, within the largest Ti clusters the fragmentation pathway was found to occur through both the continuous bisection and layer-by-layer models. The fragmentation behavior of polyolefin catalysts was for the first time visualized in 3-D by directly imaging and correlating the distribution of the Ti species to the polymer-catalyst composite phase.
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