Molecular Weight Cross-linking Research Articles

A further study of interpenetrating polymer networks of poly(2,6‐dimethyl‐1,4‐phenylene oxide) and polybutadiene: Effect of higher molecular weight crosslinker

Journal of Applied Polymer ScienceVolume 40, Issue 1-2 p. 313-314 NoteFree Access A further study of interpenetrating polymer networks of poly(2,6-dimethyl-1,4-phenylene oxide) and polybutadiene: Effect of higher molecular weight crosslinker Yao-He Hua, Yao-He Hua Department of Chemistry State University of New York Albany, New York 12222Search for more papers by this authorHarry L. Frisch, Harry L. Frisch Department of Chemistry State University of New York Albany, New York 12222Search for more papers by this author Yao-He Hua, Yao-He Hua Department of Chemistry State University of New York Albany, New York 12222Search for more papers by this authorHarry L. Frisch, Harry L. Frisch Department of Chemistry State University of New York Albany, New York 12222Search for more papers by this author First published: 5 ‐ 20 July 1990 https://doi.org/10.1002/app.1990.070400124Citations: 4AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL No abstract is available for this article. References 1 H. L. Frisch and Yao-He Hua, Macromolecules, to appear. 2 H. L. Frisch, D. Klempner, H. K. Yoon, and K. C. Frisch, Macromolecules, 13, 1016 (1980). 3 S. Singh, H. Ghiradella, and H. L. Frisch, Macromolecules, to appear. 4 K. Gebreyes and H. L. Frisch, J. Polym. Sci. Polym. Chem. Ed., 26, 3391– 3395 (1988). 5 K. Binder and H. L. Frisch, J. Chem. Phys., 81, 2126 (1984). Citing Literature Volume40, Issue1-25 ‐ 20 July 1990Pages 313-314 ReferencesRelatedInformation

3'-Arylazido-β-alanyl-2-azido ATP, a Cross-Linking Photoaffinity Label for F1ATPases

The synthesis of the 3'-arylazido-2-azido ATP derivative 3'-O-(3-[N-(4-azido-2-nitrophenyl)-amino]propionyl)2-azido-adenosine 5'-triphosphate (2,3'-DiN3ATP) is described. The bifunctional photoreactive ATP analog is characterized spectroscopically. Photoaffinity labeling of F1ATPase from Micrococcus luteus by this analog results in the inactivation of the enzyme and in the formation of higher molecular weight cross-links, composed of alpha- and beta-subunits.

D-H Exchange During Collagen-Fold Formation. Nucleation Processest

Nucleation of collagen-fold formation has been followed by D-H exchange techniques coupled with infra-red measurements of the Arnide II absorbance at 1550 cm-'. Solution Sephadex exchange and thin film exchange techniques were applied to two gelatin fractions differing in molecular weight and chain cross-linking. The exchange rate was measured at temperatures, T above and below the melting temperature, TM. At T> TM two classes of exchangeable H were detected. On the basis of their pD-rate profiles, these classes were assigned to pyrollidine ring rich chain sequences and t o the sequences deficient in these residues. At T< TM two additional classes were noted -a non-exchangeable group (the fold-nuclei) and a restricted exchange group probably adjacent to the fold-nuclei. It is proposed that nucleation begins in the pyrollidine residue rich regions but that there is a preliminary H-bonding in regions adjacent to the nuclei which must be reorganized before collagen-fold growth is propagated. Molecular weight...