production of selected secondary metabolites in transformed ...
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Study <strong>of</strong> the <strong>in</strong>fluence <strong>of</strong> different percentage distribution <strong>of</strong> cross-l<strong>in</strong>ked fraction <strong>in</strong><br />
sample U14BD2000:<br />
(Type AA with the less quantity, type DD with the most quantity <strong>of</strong> cross-l<strong>in</strong>ked fraction<br />
content)<br />
Parameter <strong>of</strong> swell<strong>in</strong>g Q<br />
14,00<br />
12,00<br />
10,00<br />
8,00<br />
6,00<br />
4,00<br />
2,00<br />
Influence <strong>of</strong> different quantity <strong>of</strong> cross-l<strong>in</strong>ked to the<br />
solubility parametr <strong>of</strong> U14BD2000 (accord<strong>in</strong>g its<br />
parameter <strong>of</strong> swell<strong>in</strong>g)<br />
type AA<br />
type BB<br />
type CC<br />
type DD<br />
0,00<br />
18,0 19,0 20,0 21,0 22,0 23,0 24,0 25,0<br />
Solubility parameter <strong>of</strong> sample δ1 (10-3J1/2m -3/2 )<br />
Obta<strong>in</strong>ed results show that <strong>in</strong> the case <strong>of</strong> the <strong>in</strong>creas<strong>in</strong>g quantity <strong>of</strong> rigid segment the<br />
solubility parameter δ2 is chang<strong>in</strong>g and mov<strong>in</strong>g to higher values. In the case <strong>of</strong> <strong>in</strong>creas<strong>in</strong>g <strong>of</strong><br />
cross-l<strong>in</strong>ked fraction, the value <strong>of</strong> δ2 is more or less stable and similar and changes only<br />
parameter <strong>of</strong> swell<strong>in</strong>g. – Both <strong>of</strong> these agree with the theory.<br />
CONCLUSION:<br />
Type <strong>of</strong><br />
sample:<br />
δ2 - from measur<strong>in</strong>g<br />
AA 19,8<br />
BB 20,5<br />
CC 20,5<br />
DD 20,5<br />
Accord<strong>in</strong>g to the obta<strong>in</strong>ed data, experimental results comply with the theory about possible<br />
evaluation <strong>of</strong> coat<strong>in</strong>g’s solubility on the base <strong>of</strong> knowledge their solubility parameters and<br />
also structures <strong>in</strong> most cases.<br />
In next experimental part <strong>of</strong> my dissertation work I would like to improved, extend and<br />
apply this theory and <strong>in</strong>formation to the area <strong>of</strong> dissolv<strong>in</strong>g and remov<strong>in</strong>g especially water<br />
based coats and modify all <strong>of</strong> this for use <strong>in</strong> practice.<br />
Acknoledgments:<br />
I would like to thank to C. B. Coreia and Pr<strong>of</strong>. J. C. Bordado, Instituto Superior Technico,<br />
Lisboa for their help and support dur<strong>in</strong>g this research.<br />
LINKS:<br />
1. Barton A. F. M., Handbook <strong>of</strong> solubility parameters and other cohesion parameters,<br />
London 1991<br />
2. Van Krevelen D. W., H<strong>of</strong>tyzer P. J., Properties <strong>of</strong> polymers – their estimation and<br />
correlation with chemical structure, Amsterdam 1976<br />
3. Bicerano J., Prediction <strong>of</strong> polymer properties (second edition), New York, 1996<br />
4. Munk P., Am<strong>in</strong>abhavi T.M., Macromolecular science (second edition), New York, 2002<br />
5. Mleziva J., Šňupárek J., Polymery-výroba, struktura, vlastnosti a použití, Praha, 2002<br />
Sborník soutěže Studentské tvůrčí č<strong>in</strong>nosti Student 2006 a doktorské soutěže O cenu děkana 2005 a 2006<br />
Sekce DSP 2006, strana 253
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