Synthesis and Characterization of a Lignin Based Thermoplastic
Young, Eric. (2017-08). Synthesis and Characterization of a Lignin Based Thermoplastic. Theses and Dissertations Collection, University of Idaho Library Digital Collections. https://www.lib.uidaho.edu/digital/etd/items/young_idaho_0089n_11233.html
- Title:
- Synthesis and Characterization of a Lignin Based Thermoplastic
- Author:
- Young, Eric
- Date:
- 2017-08
- Keywords:
- elastomer Lignin Poly(ester-amide) Renewable Thermal Analysis Thermoplastic
- Program:
- Environmental Science
- Subject Category:
- Polymer chemistry
- Abstract:
-
Lignin based copolymers were synthesized using a single pot, solvent free, melt condensation reaction. The synthesis occurred in two stages. In the first stage a prepolymer consisting of a diol and diacid with varying amounts diamine was heated under vacuum. In the second stage, prepolymer was mixed with kraft lignin and further reacted under vacuum at elevated temperature. Progression of polymerization was monitored using FT-IR and ESI-MS. Polymer properties were characterized using DMA, DSC and TGA techniques. The morphology was analyzed using polarized optical microscopy. Polymer mechanical properties were found to be influenced by the type of diacid, lignin and diamine content, ball milling of lignin and presence of an acid catalyst. The lignin-copolymers were shown to have thermoplastic behavior. Additionally, above 30 wt% lignin the lignin-copolymers did not exhibit melt behavior.
- Description:
- masters, M.S., Environmental Science -- University of Idaho - College of Graduate Studies, 2017-08
- Major Professor:
- McDonald, Armando G.
- Committee:
- Gorman, Thomas M.; Waynant, Kristopher
- Defense Date:
- 2017-08
- Identifier:
- Young_idaho_0089N_11233
- Type:
- Text
- Format Original:
- Format:
- application/pdf
- Rights:
- In Copyright - Educational Use Permitted. For more information, please contact University of Idaho Library Special Collections and Archives Department at libspec@uidaho.edu.
- Standardized Rights:
- http://rightsstatements.org/vocab/InC-EDU/1.0/