✦ LIBER ✦

Unperturbed dimensions of polypivalolactone

✍ Scribed by T. Capaccioli; L. Zotteri

Publisher: Elsevier Science
Year: 1975
Tongue: English
Weight: 402 KB
Volume: 11
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(75)90131-7

No coin nor oath required. For personal study only.

✦ Synopsis

A~tract--Experimental results concerning the fractionation of polypivalolactone, carried out by gel permeation chromatography (GPC) in m-cresol, are reported. For each fraction, the number average and the weight average molecular weights, obtained by GPC using an osmometric calibration, and the intrinsic viscosities in trifluoroacetic acid at 20 ~ are given. These data have been used to calculate the unperturbed dimensions, following the extrapolation procedures proposed by Stockmayer-Fixman and by Cowie. The characteristic ratio C~ thus obtained has been compared with that computed on the basis of the isomeric rotational model.

📜 SIMILAR VOLUMES

Unperturbed dimensions of poly-p-chloros

Unperturbed dimensions of poly-p-chlorostyrene

✍ I. Hernández-Fuentes; M.G. Prolongo 📂 Article 📅 1979 🏛 Elsevier Science 🌐 English ⚖ 244 KB

Viscosity measurements on poly-p-chlorostyrene (PPCS) in benzene-methanol mixtures have been carried out at their corresponding theta temperatures determined by the phase separation method. Viscosity measurements were also run in benzene at the same temperatures. The Stockmayer-Fixman extrapolation

Unperturbed dimensions of some aryloxy p

Unperturbed dimensions of some aryloxy polyphosphazenes

✍ A.L. Andrady; J.E. Mark 📂 Article 📅 1981 🏛 Elsevier Science 🌐 English ⚖ 338 KB

Three aryloxyphosphazene copolymers, [P(ORXOR')-N-] with R = phenyl, and R' = p-ethylphenyl, 2,4-dichlorophenyl or 2-naphthyl, were each separated into four fractions using fractional precipitations from tetrahydrofuran (THF) solutions, with n-pentane as non-solvent. Two fractions from each were cha

Unperturbed dimensions of poly(phenyl ac

Unperturbed dimensions of poly(phenyl acrylate)

✍ F. Hooshmand-Mozaffar; M.K. Hoseinalizadeh-Khorasani; Malcolm B. Huglin 📂 Article 📅 1980 🏛 Elsevier Science 🌐 English ⚖ 357 KB

Unperturbed dimensions of high molecular

Unperturbed dimensions of high molecular weight polyacrylonitrile

✍ Bogdan C. Simionescu; Silvia Ioan; Maria Bercea; Cristofor I. Simionescu 📂 Article 📅 1991 🏛 Elsevier Science 🌐 English ⚖ 196 KB

Unperturbed dimensions of high molecular weight (M W = 10 6 3" 106) polyacrylonitrile samples, prepared by plasma-induced polymerization, were determined in good solvents by the Stockmayer Fixman method [for dimethylformamide (DMF)] and Lenka method (for DMF, dimethylacetamide and dimethylsulphoxide

Unperturbed dimensions of poly (1-butene

Unperturbed dimensions of poly (1-butene oxide)

✍ C. Booth; R. Orme 📂 Article 📅 1970 🏛 Elsevier Science 🌐 English ⚖ 116 KB

Unperturbed Dimensions of Polymers in Bi

Unperturbed Dimensions of Polymers in Binary Solvent Mixtures

✍ A. Dondos; H. Benoit 📂 Article 📅 1968 🏛 Elsevier Science 🌐 English ⚖ 477 KB

Intrinsic viscosity measurements were carried out on polystyrene and polyvinylpyridine solutions in various solvents and solvent mixtures. The Stockmayer-Fixman extrapolation was applied to the date: it yields the unperturbed dimensions K s of the chain. A unique value of K e was found for a given p