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Author

Harry R. Allcock

Other affiliations: Ethyl Corporation, University of Akron, University of Oklahoma  ...read more
Bio: Harry R. Allcock is an academic researcher from Pennsylvania State University. The author has contributed to research in topics: Phosphazene & Polyphosphazene. The author has an hindex of 70, co-authored 687 publications receiving 21651 citations. Previous affiliations of Harry R. Allcock include Ethyl Corporation & University of Akron.


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Book
01 Jan 1981
TL;DR: In this paper, the authors present a broad overview of the field of polymer chemistry and its application in the biomedical field, including the following: 1. Polymer Nomenclature. 2. Properties and uses of Selected Polymers. 3. Free-Radical Polymerization.
Abstract: I. SYNTHESIS AND REACTIONS OF POLYMERS. 1. The Scope of Polymer Chemistry. 2. Condensation and Other Step-Type Polymerizations. 3. Free-Radical Polymerization. 4. Ionic and Coordination Polymerization. 5. Photolytic, Radiation, and Electrolytic Polymerization. 6. Polmerization of Cyclic Organic Compounds. 7. Reactions of Synthetic Polymers. 8. Biological Polymers and Their Reactions. 9. Inorganic Elements in Polymers. II. THERMODYNAMICS AND KINETICS OF POLYMERIZATION. 10. Polymerization and Depolymerization Equilibria. 11. Kinetics of Condensation (Step-Growth) Polymerization. 12. Kinetics of Free-Radical Polymerization. 13. Kinetics of Ionic Polymerization. III. PHYSICAL CHARACTERIZATION OF POLYMERS. 14. Determination of Absolute Molecular Weights. 15. Secondary Methods for Molecular Weight Determination. 16. Thermodynamics of Solutions of High Polymers. 17. Morphology, Glass Transitions, and Polymer Crystallinity. 18. Conformational Analysis of Polymers. 19. X-Ray Diffraction by Polymers. IV. FABRICATION AND TESTING OF POLYMERS. 20. Fabrication of Polymers. 21. Testing of Polymers. V. MOLECULAR STRUCTURE, PROPERTIES, AND USES. 22. General Structure-Property Relationships. 23. Electroactive Polymers. 24. Biomedical Applications of Synthetic Polymers. VI. APPENDICES. I. Polymer Nomenclature. II. Properties and Uses of Selected Polymers. III. References to Topics not Discussed in this Book. Author Index. Subject Index.

521 citations

Journal ArticleDOI
TL;DR: In this article, the phosphazene polymer (NP(OC2H40C2H4OCH3)n, MEEP, was synthesized and amorphous solvent-free salt complexes were performed with LiSo3CF3, NaSO3 CF3, Sr(SO 3CF3)2, and AgSO3cf3.25.
Abstract: : The phosphazene polymer (NP(OC2H40C2H4OCH3)n, MEEP, was synthesized and amorphous solvent-free salt complexes were performed with LiSo3CF3, NaSO3CF3, Sr(SO3CF3)2, and AgSO3CF3. A material with the composition (LiSO3CF3)0.25. MEEP has a conductivity of .00008 ohm/cm at 30 C, which is much higher than corresponding poly (ethylene oxide) complexes. The phosphazene electrolytes are promising materials for ambient-temperature high energy density batteries.

475 citations

Book
05 Dec 2002

307 citations


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08 Dec 2001-BMJ
TL;DR: There is, I think, something ethereal about i —the square root of minus one, which seems an odd beast at that time—an intruder hovering on the edge of reality.
Abstract: There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality. Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

33,785 citations

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4,511 citations

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TL;DR: This review summarizes the main advances published over the last 15 years, outlining the synthesis, biodegradability and biomedical applications ofBiodegradable synthetic and natural polymers.

3,801 citations

Journal ArticleDOI
TL;DR: The aim of this article is to present a concise review on the applications of hydrogels in the pharmaceutical field, hydrogel characterization and analysis of drug release from such devices.

3,484 citations

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TL;DR: In this article, various factors that affect the morphology and Coulombic efficiency of Li metal anodes have been analyzed, and the results obtained by modelling of Li dendrite growth have also been reviewed.
Abstract: Lithium (Li) metal is an ideal anode material for rechargeable batteries due to its extremely high theoretical specific capacity (3860 mA h g−1), low density (0.59 g cm−3) and the lowest negative electrochemical potential (−3.040 V vs. the standard hydrogen electrode). Unfortunately, uncontrollable dendritic Li growth and limited Coulombic efficiency during Li deposition/stripping inherent in these batteries have prevented their practical applications over the past 40 years. With the emergence of post-Li-ion batteries, safe and efficient operation of Li metal anodes has become an enabling technology which may determine the fate of several promising candidates for the next generation energy storage systems, including rechargeable Li–air batteries, Li–S batteries, and Li metal batteries which utilize intercalation compounds as cathodes. In this paper, various factors that affect the morphology and Coulombic efficiency of Li metal anodes have been analyzed. Technologies utilized to characterize the morphology of Li deposition and the results obtained by modelling of Li dendrite growth have also been reviewed. Finally, recent development and urgent need in this field are discussed.

3,394 citations