This thesis focuses on the synthesis of Intumescent Flame Retardant (IFR) from a sustainable resource that is abundant, environmentally less toxic than standard IFRs, biodegradable and economical. For this purpose Nano Fibrillated Cellulose (NFC) was used as a carbon/char producing source. Modification by phosphorous and nitrogen compounds as acid and gas producing agents resulted in the synthesis of IFR. Fourier Transform Infrared Spectroscopy (FTIR) was used to confirm the modification of the cellulose. Thermo Gravimetric Analysis (TGA) was performed to check the thermal stability of modified cellulose. Estimation of cellulose phosphate was measured by Potentiometry. The modified cellulose composites with Poly Lactic Acid (PLA) were obtained by using a melt blending technique. The composites were analyzed for viscoelastic/stiffness properties using Dynamic mechanical analyzer (DMA). The composites were found to exhibit horizontal burn (HB) flammability ratings. Additionally, to study the interfacial and dispersion properties of nano fibrillated cellulose in PLA two thermally stable fluorescent tagged celluloses with amino-methyl Coumarin and Fluoresceinamine (FA) dyes in PLA were synthesized. The Amino methyl Coumarin tagged cellulose showed good thermal stability even after blending with PLA and showed absorbance in UV-Visible Spectrophotometer; the FA tagged cellulose was thermally stable before blending with PLA but showed reduced quantum yield once it was blended in PLA.
|Advisor:||Fox, Douglas M.|
|Commitee:||Girard, James, Miller, Abigail|
|School Location:||United States -- District of Columbia|
|Source:||MAI 51/04M(E), Masters Abstracts International|
|Subjects:||Polymer chemistry, Environmental science|
|Keywords:||Cellulose-PLA composites, Fibers, Flammability, Intumescent flame retardants, Thermal and mechanical properties|
Copyright in each Dissertation and Thesis is retained by the author. All Rights Reserved
The supplemental file or files you are about to download were provided to ProQuest by the author as part of a
dissertation or thesis. The supplemental files are provided "AS IS" without warranty. ProQuest is not responsible for the
content, format or impact on the supplemental file(s) on our system. in some cases, the file type may be unknown or
may be a .exe file. We recommend caution as you open such files.
Copyright of the original materials contained in the supplemental file is retained by the author and your access to the
supplemental files is subject to the ProQuest Terms and Conditions of use.
Depending on the size of the file(s) you are downloading, the system may take some time to download them. Please be