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Yan Ching Jean
Researcher at University of Missouri–Kansas City
Publications - 157
Citations - 3535
Yan Ching Jean is an academic researcher from University of Missouri–Kansas City. The author has contributed to research in topics: Positron annihilation spectroscopy & Positron. The author has an hindex of 32, co-authored 157 publications receiving 3321 citations. Previous affiliations of Yan Ching Jean include Chung Yuan Christian University & University of Missouri.
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Perspective of Positron Annihilation Spectroscopy in Polymers
TL;DR: Positron annihilation spectroscopy (PAS) is a novel method that provides molecular-level information about complex macromolecular structure in a manner different from, but complementary to, conventional physical and chemical methodology as mentioned in this paper.
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Glass transition of polystyrene near the surface studied by slow-positron-annihilation spectroscopy
TL;DR: This paper measured the Doppler broadening energy spectra of positron annihilation using a variable mono-energetic positron beam as a function of the positron energy and temperature in polystyrene.
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Diffusivity enhancement of water vapor in poly(vinyl alcohol)–fumed silica nano-composite membranes: Correlation with polymer crystallinity and free-volume properties
Shingjiang Jessie Lue,Da-Tung Lee,Jeng-Yo Chen,Chun-Hung Chiu,Chien-Chieh Hu,Yan Ching Jean,Yan Ching Jean,Juin-Yih Lai +7 more
TL;DR: In this article, the diffusion coefficients of water vapor in polyvinyl alcohol-fumed silica (PVA-FS) nano-composite membranes were determined using the gravimetric method.
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Determination of Free-Volume Properties in Polymers Without Orthopositronium Components in Positron Annihilation Lifetime Spectroscopy
Kuo-Sung Liao,Hongmin Chen,Somia Awad,Jen-Pwu Yuan,Wei-Song Hung,Kuier-Rarn Lee,Juin-Yih Lai,Chien-Chieh Hu,Yan Ching Jean +8 more
TL;DR: In this article, a newly modified positron lifetime-free volume correlation equation is established for the determination of free volume, by fitting free-volume results obtained from o-Ps lifetimes with the positron lifetimes in pressure-and temperature-dependent data in polymers and calibrated with known or calculated cavity sizes in zeolite materials.
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Pressure dependence of free-volume hole properties in an epoxy polymer
TL;DR: Positron annihilation spectroscopy has been applied to study free-volume properties in an amine-cured epoxy as a function of quasi-isotropic pressure in the range o-15 kbar.