Positronium Lifetime Study on Subnanoscopic Structure of Polyrotaxane

Kenji Ito; Chang Ming Zhao; Kohzo Ito; Yoshinori Kobayashi

doi:10.4028/www.scientific.net/MSF.733.167

Paper Titles

Positron Annihilation Lifetime of Irradiated Polyimide
p.151

Effect of Crosslinkers on the Microstructure and Swelling Properties of the N-Isopropyl Acrylamide Gels: A Positron Annihilation Study
p.155

Effect of Hydrophilicity of the Sidechains on the Amorphous Structure of Polypropylene Derivatives Studied by Positronium Lifetime Measurements
p.159

Positron Lifetimes and Crystallinity of γ-Irradiated Polypropylenes
p.163

Positronium Lifetime Study on Subnanoscopic Structure of Polyrotaxane
p.167

New Organic-Inorganic Hybrid Ureasil-Based Polymer Materials Studied by PALS and SEM Techniques
p.171

Depth Profile of Chemical Composition and Free Volume of Polyurethane-Urea/Clay Nanocomposite
p.175

Relationships between Positron Lifetime and Dynamics of Polymers
p.179

On the Relationship of the Relative Intensity I₃ and a Cavity Number as Obtained from Computer Simulations
p.183

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Positronium Lifetime Study on Subnanoscopic Structure of Polyrotaxane

Abstract:

The subnanoscopic structures of polyrotaxanes, prepared from α-cyclodextrins, poly(ethylene glycol), and bulky adamantane end groups, were examined by means of the positron annihilation lifetime technique, in consideration of the free-volume hole, quantified from the long-lived ortho-positronium (o-Ps) lifetimes. The influence of the chemical structure on the temperature dependence of the o-Ps lifetimes are discussed.