Calibration of Separation and Instrumental Peak Broadening in Sec Coupled with Light Scattering of Simple Polymers

Billiani, J.; Amtmann, I.; Mayr, Torsten; Lederer, K.

doi:10.1080/01483919008049081

Cited by 10 publications

(9 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With regard to the interdetector volume ( 6 ) search, an equation based upon symmetrical axial dispersion theory and experimental results combined to show that the local intrinsic viscosity value is very similarly affected by 6 and a. This supports the idea of using an effective 6 to effect an axial dispersion correction to local intrinsic viscosity data.…”

Section: Con Clus I 0 N Ssupporting

confidence: 57%

“…Figure 2 shows the results of the same type of superposition, again using eq. ( 6 ) but this time assuming an interdetector volume of zero. In this case, a value of u of 0.5 achieved a high degree of superposition of the two curves.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, Equation ( 6 ) shows that the Type IV intrinsic viscosity calibration curve corrected for axial dispersion is the result of two contributions: an intrinsic viscosity computed by shifting both the specific viscosity and concentration chromatograms and a constant term involving only the slope of the intrinsic viscosity calibration curve and the value of u. It shows that when a simple interdetector volume search is used we are assuming u to be zero.…”

Section: Determination Of Lnterdetector Volumementioning

confidence: 98%

“…Obtaining u as a function of retention volume is still an active area of research. 6 One method of readily determining u and, a t the same time, discovering whether the "band spreading" is actually Gaussian was published by Balke and H a m i e l e~.~ The following equations are used to obtain u and another parameter, S K , which indicates the amount of skewing of the chromatogram of a truly monodisperse polymer:…”

Section: Axial Dispersion Correction Of the Concentration Chromatogrammentioning

confidence: 99%

“…A variety of methods have been proposed to obtain the interdetector volume, 6. ' The method, to be more fully examined in this paper, is based upon the idea of finding the value of 6 that will superimpose the intrinsic viscosity calibration curve obtained for a single broad molecular weight distribution linear homopolymer (Type IV calibration curve as defined in Ref.…”

Section: Determination Of Lnterdetector Volumementioning

confidence: 99%

See 4 more Smart Citations

SEC–viscometer detector systems. II. Resolution correction and determination of interdetector volume

Cheung

Lew

Balke

et al. 1993

J of Applied Polymer Sci

View full text Add to dashboard Cite

SYNOPSISThe closely related topics of resolution correction and the determination of interdetector volume were examined. In determining the interdetector volume ( 6 ) by searching to superimpose two types of intrinsic viscosity calibration curve (one from narrow standards and one from a broad standard), the underlying equation based upon symmetrical axial dispersion theory was derived. This equation combined with experimental results showed that the local intrinsic viscosity value is very similarly affected by interdetector volume and by band spreading. The result supported the idea of using an effective 6 to effect an axial dispersion correction to local intrinsic viscosity data. However, it also increased the difficulty of finding both 6 and standard deviation (a) simultaneously by numerical search. Furthermore, attempts to apply the method to the chromatograms of narrow standards showed inadequate superposition. Following calculation of skewing factors, the superposition problems were attributed to skewing of the chromatograms of the monodisperse polymer standards used.

show abstract

Section: Con Clus I 0 N Ssupporting

confidence: 57%

Section: Resultsmentioning

confidence: 99%

Section: Determination Of Lnterdetector Volumementioning

confidence: 98%

Section: Axial Dispersion Correction Of the Concentration Chromatogrammentioning

confidence: 99%

Section: Determination Of Lnterdetector Volumementioning

confidence: 99%

See 3 more Smart Citations

SEC–viscometer detector systems. II. Resolution correction and determination of interdetector volume

Cheung

Lew

Balke

et al. 1993

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

Determination and correction of peak broadening in size exclusion chromatography of controlled rheology polypropylene

Lederer

Beytollahi-Amtmann

Billiani

1994

J of Applied Polymer Sci

View full text Add to dashboard Cite

SYNOPSISThe peak broadening in size exclusion chromatography of seven commercial polystyrene (PS) standards with narrow molar mass distribution (MMD) and of 6-9 polypropylene (PP) fractions ( MW/M,, = 1.34-2.10) obtained by direct extraction was determined in four different column sets. The dependence of the Gaussian peak broadening parameter, 02, on the peak elution volume was different for PS and PP. For a commercial grade of controlled rheology PP ( C R -P P ) (Daplen PT55) with M w / M , , < 3 it was shown that disregard of the peak broadening effect leads to considerable errors in the MMD at low and high molar mass and in the polydispersity parameter Mw/M,,. The same lot was studied in a n Austrian National Research program for its physical properties in processing and application and in a round-robin test of IUPAC working party IV.2.2. on molecular characterization of commercial polymers.

show abstract

New efficient boron-containing initiators of methyl methacrylate radical polymerization

et al. 2004

View full text Add to dashboard Cite

An efficient method for methyl methacrylate radical polymerization by tri n propyl , triisopropyl , and triisobutylborane ammonia complexes, including the addition of a boron containing initiating agent into the monomer in air, was developed. An advantage of this method is that the reaction occurs at room temperature, requires no peroxide components, and leads to polymers with enhanced thermal stability.

show abstract

Calibration of Separation and Instrumental Peak Broadening in Sec Coupled with Light Scattering of Simple Polymers

Cited by 10 publications

References 14 publications

SEC–viscometer detector systems. II. Resolution correction and determination of interdetector volume

SEC–viscometer detector systems. II. Resolution correction and determination of interdetector volume

Determination and correction of peak broadening in size exclusion chromatography of controlled rheology polypropylene

New efficient boron-containing initiators of methyl methacrylate radical polymerization

Contact Info

Product

Resources

About