Self-Purification of Isotactic Polypropylene Films from Unknown Impregnated Impurities
| Autor: | N. N. Matushkina, N. L. Strusovskaya, E. P. Ageev |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
010304 chemical physics Chemistry Sorption 02 engineering and technology Surfaces and Interfaces Polymer 021001 nanoscience & nanotechnology 01 natural sciences Hexane chemistry.chemical_compound Delocalized electron Colloid and Surface Chemistry Chemical engineering Impurity Tacticity 0103 physical sciences medicine Molecule Physical and Theoretical Chemistry Swelling medicine.symptom 0210 nano-technology |
| Zdroj: | Colloid Journal. 81:77-83 |
| ISSN: | 1608-3067 1061-933X |
| DOI: | 10.1134/s1061933x19020029 |
| Popis: | Commercial films of stereoregular isotactic polypropylene (PP) are the objects of the study. The aim of the work is to substantiate the mechanism of the previously observed weight loss of the PP films as a result of consequtive sorption of hydrophobic and hydrophilic substances, while considering PP as a combination of hydrophobic and hydrophilic localized and delocalized sorbents. A variable sequence of the processes of sorption of probe molecules with different polarities is used as an investigation method, while only an analytical balance serves as a research instrument. It is shown that the weight loss of PP films during the sorption of a hydrophilic substance (water) after their preliminary swelling in a hydrophobic sorbate (hexane) containing a small amount of native water is caused by complexation of water molecules with hydrophilic impurities. As a result, a reverse flow of these complexes out of the polymer occurs along the transport channels that arise during its swelling in the hydrophobic sorbate (hexane). |
| Databáze: | OpenAIRE |
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