Molecular weight characterization of wood pulp cellulose: Dissolution and size exclusion chromatographic analysis

被引：0
|
作者：
Silva, AA
Laver, ML
机构：
来源：
TAPPI JOURNAL | 1997年 / 80卷 / 06期
关键词：
acetic acid; amides; cellulose; chlorides; chromatography; depolymerization; dissolving; lithium chloride; lithium compounds; methyl groups; molecular weight; molecular weight distribution; number average molecular weight; pulps; weight average molecular weight;
D O I：
暂无
中图分类号：
TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];
学科分类号：
0805 ; 080502 ; 0822 ;
摘要：
Wood pulp celluloses dissolved in N,N,-dimethylacetamide-lithium chloride solubilized cellulose components without prior extraction or derivatization and resulted in stable solution. Optimum dissolution conditions depended highly on the molecular weight, crystallinity and lignin content of the sample. Size exclusion chromatography with polystyrene standards provided molecular weight distributions. The data showed different molecular weight distributions, peak locations, and molecular weights for each sample and revealed whether random or uniform depolymerization had occurred during processing.
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页码：173 / 180
页数：8
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