Crosslink Densities and Phase Morpholgies in Dynamically Vulcanized TPEs

1995 ◽  
Vol 68 (4) ◽  
pp. 573-584 ◽  
Author(s):  
Maria D. Ellul ◽  
Jaymini Patel ◽  
Andrew J. Tinker
Keyword(s):  
Electron Microscopy ◽  
Nmr Spectroscopy ◽  
Crosslink Density ◽  
Thermoplastic Elastomers ◽  
Network Visualization ◽  
Visualization Technique ◽  
Recent Developments ◽  
Microscopy Techniques ◽  
Crosslink Densities

Abstract Recent developments in characterization techniques have permitted estimation of the crosslink density attained in dynamically vulcanized thermoplastic elastomers. The range of techniques available for investigation of the phase morphology of this type of TPE has also increased. The characterization of experimental TPEs based on natural rubber/polypropylene and EPDM/polypropylene is reported here. A combination of several optical and electron microscopy techniques were employed. Crosslink densities estimated by swollen-state NMR spectroscopy are presented and are corroborated by estimates from a network visualization technique for TPEs.

Advanced Electron Microscopy Characterization of Nanostructured Heterogeneous Catalysts

2004 ◽  
Vol 10 (1) ◽  
pp. 55-76 ◽  
Author(s):  
Jingyue Liu
Keyword(s):  
Electron Microscopy ◽  
Heterogeneous Catalysis ◽  
Heterogeneous Catalysts ◽  
Nanostructured Catalysts ◽  
Catalyst Characterization ◽  
Challenges And Opportunities ◽  
Recent Developments ◽  
Microscopy Characterization ◽  
Microscopy Techniques

Heterogeneous catalysis is one of the oldest nanosciences. Although model catalysts can be designed, synthesized, and, to a certain degree, characterized, industrial heterogeneous catalysts are often chemically and physically complex systems that have been developed through many years of catalytic art, technology, and science. The preparation of commercial catalysts is generally not well controlled and is often based on accumulated experiences. Catalyst characterization is thus critical to developing new catalysts with better activity, selectivity, and/or stability. Advanced electron microscopy, among many characterization techniques, can provide useful information for the fundamental understanding of heterogeneous catalysis and for guiding the development of industrial catalysts. In this article, we discuss the recent developments in applying advanced electron microscopy techniques to characterizing model and industrial heterogeneous catalysts. The importance of understanding the catalyst nanostructure and the challenges and opportunities of advanced electron microscopy in developing nanostructured catalysts are also discussed.

Recent Developments in Transmission Electron Microscopy Techniques to the Characterization of Cycled Li-Ion Electrode Materials

2019 ◽  
Vol 3 (27) ◽  
pp. 139-153 ◽  
Author(s):  
Loic Dupont ◽  
Lydia Laffont ◽  
Sylvie Grugeon ◽  
Stephane Laruelle ◽  
Vincent Bodenez ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Electrode Materials ◽  
Transmission Electron ◽  
Recent Developments ◽  
Li Ion ◽  
Microscopy Techniques

scholarly journals Characterization of solid fission products in 13.7% FIMA MOX fuel using electron microscopy techniques

2019 ◽  
Vol 524 ◽  
pp. 67-79 ◽  
Author(s):  
Riley J. Parrish ◽  
Karen E. Wright ◽  
Alexander J. Winston ◽  
Casey McKinney ◽  
Jason M. Harp ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Fission Products ◽  
Mox Fuel ◽  
Microscopy Techniques
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