𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Application of gel permeation chromatography and viscometry for characterization of branched polydisperse polycarbonate

✍ Scribed by Z. Dobkowski; J. Brzeziński

Publisher
Elsevier Science
Year
1981
Tongue
English
Weight
273 KB
Volume
17
Category
Article
ISSN
0014-3057

No coin nor oath required. For personal study only.

✦ Synopsis

Gel permeation chromatography (GPC) and viscometry (V) methods have been combined for determination of long-chainbranching in bisphenol-A polycarbonate (PC) by means of a branching factor gv = M*~/M*, where M*g and M* are the apparent viscosity-average molecular weights calculated from GPC data and from intrinsic viscosities [r/] of the samples respectively. A linear dependence of g~ on molar ~o of branching agent has been obtained. The GPC data on PC samples have also been applied for verification of an earlier [r/] M relationship for branched polydisperse polymers.

📜 SIMILAR VOLUMES

Branching in bisphenol a polycarbonate:
Branching in bisphenol a polycarbonate: Gel permeation chromatography, viscometry and light scattering
✍ R.L. Bartosiewicz; C. Booth; A. Marshall 📂 Article 📅 1974 🏛 Elsevier Science 🌐 English ⚖ 473 KB

Branching in bisphenol A polycarbonate has been investigated by fractionation, gel permeation chromatography, viscometry and light scattering. The samples studied (Makrolon 3000 and 3000L) are branched, Makrolon 3000 more so than Makrolon 3000L. The variation of the branching parameters with molecul

Coupling of gel permeation chromatograph
Coupling of gel permeation chromatography and automatic viscometry. application to the study of long chain branched polyethylene
✍ D. Constantin 📂 Article 📅 1977 🏛 Elsevier Science 🌐 English ⚖ 494 KB

An automatic viscometer coupled with a GPC instrument is reported. The calculations which are briefly described give the molecular weight distribution corrected for long-chain branching effect, the variations of the structure parameter 9' and of the long-chain branching frequency 2 with molecular we

Calibration of gel permeation chromatogr
Calibration of gel permeation chromatography system for polycarbonate
✍ J. Brzeziński; Z. Dobkowski 📂 Article 📅 1980 🏛 Elsevier Science 🌐 English ⚖ 159 KB

A combination of the universal calibration method, with direct calibration with several otigomers of known molecular weight, gave excellent results in the determination of the average molecular weights and molecular weight distribution for bisphenol A type polycarbonate.