✦ LIBER ✦

Conformation and transport properties of poly(alkylene phosphate)—A synthetic analogue of natural teichoic acids—I. Hypercoiled to extended coil state transition in poly(1,3-propylene phosphate)

✍ Scribed by Romuald Wódzki

Publisher: Elsevier Science
Year: 1986
Tongue: English
Weight: 249 KB
Volume: 22
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(86)90027-3

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✦ Synopsis

The pH-induced conformational transition of poly(l,3-propylene phosphate) (PPP) in an aqueous solution has been investigated by the potentiometric method. It has been found that PPP undergoes a cooperative macroconformational transition upon changing the fraction of dissociated phosphate groups from 0.3 to 0.4. The standard free energy for the transition from a hypothetical hypercoiled form to a loosely coiled form was estimated to be 565 J/mol.

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Conformation and transport properties of poly(alkylene phosphate)—A synthetic analogue of natural teichoic acids—II. Conductivity percolation in poly(vinyl chloride)-poly(1,3-propylene phosphate) membranes

✍ Romuald Wódzki 📂 Article 📅 1986 🏛 Elsevier Science 🌐 English ⚖ 347 KB

The electrical conductivity of poly(vinyl chloride)-poly(1,3-propylene phosphate) membranes was measured as a function of ionic polymer content and its ionic state. The results are discussed by applying the percolation conductivity theory and considering the conformational transition upon neutraliza