Size-Exclusion Chromatography and Aggregation Studies of Acetylated Lignins in N,N-Dimethylacetamide in the Presence of Salts

被引：12
|
作者：
Clauss, Manuel M. [1 ]
Weldin, Dianne L. [2 ]
Frank, Erik [1 ]
Giebel, Elisabeth [1 ]
Buchmeiser, Michael R. [1 ]
机构：
[1] ITCF, D-73770 Denkendorf, Germany
[2] Univ Stuttgart, Inst Polymerchem, D-70569 Stuttgart, Germany
来源：
MACROMOLECULAR CHEMISTRY AND PHYSICS | 2015年 / 216卷 / 20期
关键词：
dynamic light scattering; fractionation; lignin; size exclusion chromatography (SEC); MOLAR-MASS; CELLULOSE; SOLVENT; MODEL; WATER;
D O I：
10.1002/macp.201500222
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The molar masses of acetylated kraft lignin and organosolv lignin are determined using both dynamic light scattering and size-exclusion chromatography (SEC). Preparative gel fractionation of both lignins is allowed for the further analysis of low-polydispersity lignin fractions. Fundamental information about the aggregation behavior of different molecular weight lignins in different solvent systems is provided. Two different solvent systems are used for SEC. Universal calibration is used for analysis. Applying the Flory-Fox theory, the obtained molecular weights are allowed for determining the maximum glass transition temperature at theoretical infinite molecular weight, T-g, of both acetylated lignins.
引用
收藏
页码：2012 / 2019
页数：8
相关论文
共 50 条
12345