Abstract
Industrially produced lignins are by-products of the pulp and paper industry and depending on the source and pulping technology they have deviating functional groups, solubility behavior and reactivity. In the present paper, kraft lignin was pretreated by mechanical milling and polyesterified with ε-caprolactone to create hydroxyl groups that are more easily available for further reactions. The products obtained were analysed by size exclusion chromatography (SEC), differential scanning calorimetry (DSC) and functional group determination. The analytical data are presented as a function of reaction time, crosslinking reactions and the amount of ε-caprolactone input.
Acknowledgments
Thanks to Staerkle und Nagler for providing the kraft lignin Indulin AT and to Christine Burmeister for carrying out the laser diffraction measurements.
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©2015 by De Gruyter
Articles in the same Issue
- Frontmatter
- Original Articles
- Characterization of dissolved lignins from acetic acid Lignofibre (LGF) organosolv pulping and discussion of its delignification mechanisms
- Organic materials in black liquors of soda-AQ pulping of hot-water-extracted birch (Betula pendula) sawdust
- Effects of concentration and temperature on the rheological behavior of concentrated sodium lignosulfonate (NaLS) solutions
- Raman microscopic analysis of wood after treatment with the ionic liquid, 1-ethyl-3-methylimidazolium chloride
- Isolation and structural elucidation of norlignan polymers from the heartwood of Cryptomeria japonica
- Effect of ball milling on lignin polyesterification with ε-caprolactone
- Property enhancement of kenaf fiber composites by means of vacuum-assisted resin transfer molding (VARTM)
- Wood polypropylene composites prepared by thermally modified fibers at two extrusion speeds: mechanical and viscoelastic properties
- Numerical analysis of temperature profiles during thermal modification of wood: chemical reactions and experimental verification
- Fast online NIR technique to predict MOE and moisture content of sawn lumber
- Numerical study of the influence of veneer lathe checks on the elastic mechanical properties of laminated veneer lumber (LVL) made of beech
- Amination of pretreated ayous (Triplochiton scleroxylon) sawdust with two organosilanes: characterization, stability, and permselective property
- Damage evolution in wood – pattern recognition based on acoustic emission (AE) frequency spectra
- Mechanical stability of superhydrophobic epoxy/silica coating for better water resistance of wood
- Short Note
- Urea-formaldehyde resin penetration into Pinus radiata tracheid walls assessed by TEM-EDXS
- Obituary
- Professor Dr. Arnis Treimanis
Articles in the same Issue
- Frontmatter
- Original Articles
- Characterization of dissolved lignins from acetic acid Lignofibre (LGF) organosolv pulping and discussion of its delignification mechanisms
- Organic materials in black liquors of soda-AQ pulping of hot-water-extracted birch (Betula pendula) sawdust
- Effects of concentration and temperature on the rheological behavior of concentrated sodium lignosulfonate (NaLS) solutions
- Raman microscopic analysis of wood after treatment with the ionic liquid, 1-ethyl-3-methylimidazolium chloride
- Isolation and structural elucidation of norlignan polymers from the heartwood of Cryptomeria japonica
- Effect of ball milling on lignin polyesterification with ε-caprolactone
- Property enhancement of kenaf fiber composites by means of vacuum-assisted resin transfer molding (VARTM)
- Wood polypropylene composites prepared by thermally modified fibers at two extrusion speeds: mechanical and viscoelastic properties
- Numerical analysis of temperature profiles during thermal modification of wood: chemical reactions and experimental verification
- Fast online NIR technique to predict MOE and moisture content of sawn lumber
- Numerical study of the influence of veneer lathe checks on the elastic mechanical properties of laminated veneer lumber (LVL) made of beech
- Amination of pretreated ayous (Triplochiton scleroxylon) sawdust with two organosilanes: characterization, stability, and permselective property
- Damage evolution in wood – pattern recognition based on acoustic emission (AE) frequency spectra
- Mechanical stability of superhydrophobic epoxy/silica coating for better water resistance of wood
- Short Note
- Urea-formaldehyde resin penetration into Pinus radiata tracheid walls assessed by TEM-EDXS
- Obituary
- Professor Dr. Arnis Treimanis