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FTIR imaging coupled with multivariate analysis for study of initial diffusion of different solvents in cellulose acetate butyrate films
- Source :
- Cellulose. 15:23-33
- Publication Year :
- 2007
- Publisher :
- Springer Science and Business Media LLC, 2007.
-
Abstract
- Fourier transform infrared (FTIR) spectroscopic imaging was used to study the initial diffusion of different solvents in cellulose acetate butyrate (CAB) films containing different amounts of acetyl and butyryl substituents. Different solvents and solvent/non-solvent mixtures were also studied. The FTIR imaging system allowed acquisition of sequential images of the CAB films as solvent penetration proceeded without disturbing the system. The interface between the non-swollen polymer and the initial swelling front could be identified using multivariate data analysis tools. For a series of ketone solvents the initial diffusion coefficients and diffusion rates could be quantified and were found to be related to the polar and hydrogen interaction parameters in the Hansen solubility parameters of the solvents. For the solvent/non-solvent system the initial diffusion rate decreased less than linearly with the weight-percent of non-solvent present in the solution, which probably was due to the swelling characteristic of the non-solvent. For a given solvent, increasing the butyryl content of the CAB increased the initial diffusion rate. Increasing the butyryl content from 17 wt.% butyryl to 37 wt.% butyryl produced a considerably larger increase in initial diffusion rate compared to an increase in butyryl content from 37 wt.% to 50 wt.% butyryl.
- Subjects :
- Polymers and Plastics
Diffusion
Solvent
Methyl isobutyl ketone
Hildebrand solubility parameter
chemistry.chemical_compound
chemistry
medicine
Organic chemistry
lipids (amino acids, peptides, and proteins)
Cellulose
Swelling
medicine.symptom
Solubility
Fourier transform infrared spectroscopy
Nuclear chemistry
Subjects
Details
- ISSN :
- 1572882X and 09690239
- Volume :
- 15
- Database :
- OpenAIRE
- Journal :
- Cellulose
- Accession number :
- edsair.doi...........0dfc334634f396c3676b0af060f4fce5