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Authors
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Sagidullin, A ; Fritzinger, B. ; Scheler, U. ; Skirda, W.D.
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Title
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Self-diffusion of low-generation PAMAM dendrimers with hydroxyl surface groups in solutions: a general regularity
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Date
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06.01.2004
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Number
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11330
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Abstract
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An experimental study of the self-diffusion and nuclear magnetic relaxation of poly(amidoamine) dendrimers with hydroxyl surface groups (PAMAM-OH) dissolved in methanol over a wide range of concentration (<img src="http://www.sciencedirect.com/scidirimg/entities/phiv.gif" alt="curly or open small phi, Greek" border=0>) is reported. It is shown that experimental concentration dependences of PAMAM-OH self-diffusion coefficients (<i>D</i>) can be reduced to the so-called generalized <img src="http://www.sciencedirect.com/scidirimg/entities/phiv.gif" alt="curly or open small phi, Greek" border=0> dependence. Over macromolecular concentration range studied, the generalized concentration dependence of PAMAM-OH <i>D</i> coincides with analogous curve obtained for poly(allylcarbosilane) dendrimers of high generations. This result confirms the existence of common regularities of the dendritic macromolecule self-diffusion, and their independence of the individual physicochemical and structural properties of dendrimer, solvent, and features of their int<br />eractions in the given systems. The concentration dependence of the PAMAM-OH diffusion also exhibits a clear signature of an inflexible molecule.
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Publisher
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Polymer
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Wikidata
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Citation
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Polymer 45 (2004) 165-170
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DOI
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https://doi.org/10.1016/j.polymer.2003.10.087
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Tags
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