Influence of Lignin Type on the Mechanical Properties of Lignin Based Compounds
| Autor: | Hinnerk Semke, Rolf Mülhaupt, Hansjörg Nitz |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Materials science
Morphology (linguistics) Polymers and Plastics General Chemical Engineering fungi Organic Chemistry Organosolv technology industry and agriculture food and beverages macromolecular substances complex mixtures Polyester chemistry.chemical_compound chemistry Chemical engineering Polyamide Materials Chemistry Organic chemistry Lignin Polymer blend Environmental scanning electron microscope computer SISAL computer.programming_language |
| Zdroj: | Macromolecular Materials and Engineering. 286:737 |
| ISSN: | 1439-2054 1438-7492 |
| DOI: | 10.1002/1439-2054(20011201)286:12<737::aid-mame737>3.0.co;2-2 |
| Popis: | Several types of sulfur-free lignins were melt compounded in a Werner & Pfleiferer twin screw extruder (ZSK 25) together with polyamide 11 (PA11), a bio-degradable polyester (Ecoflex®) and a biodegradable poly-esteramide (BAK®). Sulfur-free lignins, precipitated from black liquors of alkaline pulping of annual plants, like sisal and abaca, were compared to a sulfur-free lignin (Alcell TM ) obtained by organosolv wood pulping. Lignin content and lignin type were varied systematically in order to examine stress/strain characteristics and impact behavior. Compounds with lignins from annual plants showed similar or better mechanical properties in comparison to compounds with Alcell TM lignin. A polyamid 11 compound containing 30 wt.-% abaca lignin gave a Young's modulus of 1890 MPa, compared to 1420 MPa for PA11 and a 28% increase of yield stress. The morphology of the lignin compounds was investigated by means of environmental scanning electron microscopy (ESEM) and transmission electron microscopy (TEM). |
| Databáze: | OpenAIRE |
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