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
Characterization of homopolymers and copolymers by the coupling of gel permeation chromatography and automatic viscometry
β Scribed by Z. Grubisic-Gallot; M. Picot; Ph. Gramain; H. Benoit
- Publisher
- John Wiley and Sons
- Year
- 1972
- Tongue
- English
- Weight
- 604 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0021-8995
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π SIMILAR VOLUMES
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
## Estimation of Unperturbed Parameter K B by Gel Permeation Chromatography and Viscometry If the KMHS constants K and a for the GPC conditions, i.e., for that particular GPC solvent and temperature, are available and the w, and J , values can be obtained from a GPC chromatogram and calibration cu
## Abstract Gel permeation chromatographic (GPC) and thinβlayer chromatographic (TLC) studies of polystyrene, polybutadienes (BR), and their copolymers (SBR) have been carried out. GPC primarily separates them on the basis of molecular size, and TLC, on the basis of composition. Methods of obtainin