Molecular weight distribution acetylated lignin

Acetylated lignins, molecular weight distribution, 87,89-94/951,96 Acetylation, effect on lignin solubility, 284... [Pg.529]

This study describes the application of differential vis-cometry as a GPC detector to the problem of determining molecular weight distributions of acetylated hardwood lignins in tetrahydrofuran. Molecular weight distributions of ball-milled, organosolv, alkali-extracted/mild acid hydrolyzed, and alkali-extracted/steam exploded aspen lignins were estimated using universal calibration. [Pg.89]

Molecular Weight Distributions of Acetylated Lignins in THF Lignin Samples... [Pg.359]

Molecular Weisht Distributions of Acetylated Lignin Derivatives in THF Molecular Weight Distributions from SEC... [Pg.366]

Figure 4. Apparent molecular weight distributions in DMF of kraft lignin samples acetylated and methylated following fractionation through Sephadex LH20 in aqueous 35% dioxane after association for (1) 6740 h, (2) 3910 h and (3) 1630 h at 195 g L aqueous 1.0 M ionic strength 0.40 M NaOH. Profiles from 10 A pore-size poly(styrene-divinylbenzene) column monitored at 320 nm. ...

$Figure 4. Apparent molecular weight distributions in DMF of kraft lignin samples acetylated and methylated following fractionation through Sephadex LH20 in aqueous 35% dioxane after association for (1) 6740 h, (2) 3910 h and (3) 1630 h at 195 g L aqueous 1.0 M ionic strength 0.40 M NaOH. Profiles from 10 A pore-size poly(styrene-divinylbenzene) column monitored at 320 nm. ...$

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