K
K. L. Ngai
Researcher at University of Pisa
Publications - 420
Citations - 16562
K. L. Ngai is an academic researcher from University of Pisa. The author has contributed to research in topics: Relaxation (physics) & Relaxation (NMR). The author has an hindex of 64, co-authored 412 publications receiving 15505 citations. Previous affiliations of K. L. Ngai include Osaka University & United States Naval Research Laboratory.
Papers
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Journal ArticleDOI
Classification of secondary relaxation in glass-formers based on dynamic properties.
K. L. Ngai,Marian Paluch +1 more
TL;DR: This work identifies the class of secondary relaxations that bears a strong connection or correlation to the primary relaxation in all the dynamic properties and proposes that only these should be called the Johari-Goldstein beta-relaxation.
Journal ArticleDOI
Correlation of polymer segmental chain dynamics with temperature-dependent time-scale shifts
Donald J. Plazek,K. L. Ngai +1 more
Journal ArticleDOI
Dynamic and thermodynamic properties of glass-forming substances
TL;DR: In this paper, the important general dynamic and thermodynamic properties of structural glass-forming substances and classify them into 12 different categories, including those relating to the high frequency fast relaxation, the Johari-Goldstein β-relaxation, and the slow structural α-Relaxation.
Book
Physical Properties of Polymers
James E. Mark,K. L. Ngai,William W. Graessley,Leo Mandelkern,Edward T. Samulski,Jack L. Koenig,George D. Wignall +6 more
TL;DR: The third edition of this well known textbook as discussed by the authors discusses the diverse physical states and associated properties of polymeric materials and provides enough core material for a one semester survey course at the advanced undergraduate or graduate level.
Journal ArticleDOI
Three Coupled Relations for Relaxations in Complex Systemsa
TL;DR: In this article, the authors introduced a model of relaxation in complex systems in which the relaxation rate conventionally considered as time independent in simpler systems may become time dependent, and the mechanism for the macroscopic relaxation can often be traced on the microscopic level, however, to a fundamental relaxation mode with simple relaxation rate W, = 7;' of the primitive species (PS) that is isolated except for its interaction with the heat bath.