MULTI-ANGLE LASER LIGHT

FIGURE 6.4 Comparison of Shodex GPC UT column and conventional-type column. Column Left Shodex GPC UT-806M X 2, 8 mm i.d. X 300 mm X 2. Right Conventional type column X 2, 7.8 mm i.d. X 300 mm x 2. Eluent 0.1% BHT in ODCB. Flow rate 1.0 mL/min. Detector Rl, MALLS (multi-angle laser light scattering detector). Column temp. I45°C. Sample High-density polyethylene. 

FIGURE 6.39 Hydroxyethyl cellulose. Column Left Shodex OHpak SB-806 HQ, 8.0 mm i.d. x 300 mm. Right Shodex Asahipak GF-710 HQ, 7.6 mm i.d. x 300 mm. Eluent 100 mA1 NaNOj. Flow rate 1.0 mL/min. Detector Multi-angle laser light scattering detector. Column temp. 40°C. Sample 0.05%, 200 /iL, Hydroxyethyl cellulose. 

Static (multi-angle laser) light scattering (SLS or MALLs) Molecular weight, radius of gyration, Rg solution conformation and flexibility. Solutions need to be clear of supramolecular aggregates. Rg more sensitive to conformation than s. [3]... 

MALLS multi angle laser light scattering... 

Recently, Kulicke et al. [145] applied the principle of Flow-Field-Flow-Frac-tionation (F4) in combination with multi angle laser light scattering (MALLS) to characterize PDADMAC. Differential and integral molar mass distributions have been published for PDADMAC. One advantage of this method seems to be that it can be extended to the investigation of the mass distribution of aggregated and particulate components. 

Fig. 3 GPC setup for functional group profiling. RI refractive index detector Fluorescence fluorescence detector MALLS multi-angle laser light scattering detector...

Equation (7.36) is known as the Debye plot. Figure 7.11a and Figure 7.11b show the excess Rayleigh scattering intensities of polyacrylamide from MALLSP (multi angle laser light scattering photometer) and LALLSP, respectively. 

Multi angle laser light scattering (SEC/MALLS), 16 Multiple-component polymer systems, 36,38 Multiplet structure, 368... 

Several of the manufacturers of Multi-angle laser light scattering instruments (MALLS) have developed dry powder feeders. The Sympatec Rodos and the Aerosizer dry powder dispenser are particularly suitable for dispersing fine cohesive powders. 

Changes of the molecular mass of HA could also be monitored by a number of further methods. For instance, size exclusion chromatography/multi-angle laser light scattering (SEC-MALLS) [244] and high performance liquid chromatography (HPLC) [215] were also used to study the radical-induced depolymerization of HA. 

Tackx, P. Tacx, J.C.J.F. Chain architecture of LDPE as a function of molar mass using size exclusion chromatography and multi-angle laser light scattering (SEC-MALLS). Polymer 1998, 39 (14), 3109-3113. 

The parameter Ir lf at a given value of 9 is called the Rayleigh ratio, Rq. Modern multi-angle laser light scattering equipment (MALLS) simultaneously measures scattered intensity at several values of 9. Therefore, a typical static light-scattering experiment involves the measurement at a matrix of values of 9 and c the polymer concentration. 

SEC-MALLS size-exclusion chromatography analyses using a multi-angle laser-light scattering STFI Swedish Forest Products Laboratory... 

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