Phase Behavior and Heat Capacity of {DPnP + Water} Mixtures at the Temperature Range of 273.15–338.15 K
The differential scanning calorimetry method (DSC) was used to examine the miscibility in the {dipropylene glycol propyl ether (DPnP) + water} system. Based on recorded curves of differential heat flow on temperature, HF =f(T), the range (composition, temperature) of the occurrence of miscibility ga...
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| Language: | English |
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Wiley
2015-01-01
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| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2015/932819 |
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| author | Mariola Tkaczyk Henryk Piekarski Paweł Góralski |
| author_facet | Mariola Tkaczyk Henryk Piekarski Paweł Góralski |
| author_sort | Mariola Tkaczyk |
| collection | DOAJ |
| description | The differential scanning calorimetry method (DSC) was used to examine the miscibility in the {dipropylene glycol propyl ether (DPnP) + water} system. Based on recorded curves of differential heat flow on temperature, HF =f(T), the range (composition, temperature) of the occurrence of miscibility gap, the values of lower critical solution temperature (LCST), and critical concentration were determined. On the basis of the experimentally determined specific heat capacity data the partial molar heat capacities (Cp,2) of DPnP in the mixtures with water were calculated. Analyzing changes in the course of Cp,2=f(x2) function, the boundary of transition from a homogeneous solution was determined, in which the monomers of amphiphile dominate, to the region, in which aggregates of the cluster type appear. |
| format | Article |
| id | doaj-art-b0dedecbf59d4fb89bdc17cb3a79a878 |
| institution | Kabale University |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj-art-b0dedecbf59d4fb89bdc17cb3a79a8782025-02-03T06:07:49ZengWileyJournal of Chemistry2090-90632090-90712015-01-01201510.1155/2015/932819932819Phase Behavior and Heat Capacity of {DPnP + Water} Mixtures at the Temperature Range of 273.15–338.15 KMariola Tkaczyk0Henryk Piekarski1Paweł Góralski2Department of Physical Chemistry, Faculty of Chemistry, University of Łódź, Pomorska 165, 90-236 Łódź, PolandDepartment of Physical Chemistry, Faculty of Chemistry, University of Łódź, Pomorska 165, 90-236 Łódź, PolandDepartment of Physical Chemistry, Faculty of Chemistry, University of Łódź, Pomorska 165, 90-236 Łódź, PolandThe differential scanning calorimetry method (DSC) was used to examine the miscibility in the {dipropylene glycol propyl ether (DPnP) + water} system. Based on recorded curves of differential heat flow on temperature, HF =f(T), the range (composition, temperature) of the occurrence of miscibility gap, the values of lower critical solution temperature (LCST), and critical concentration were determined. On the basis of the experimentally determined specific heat capacity data the partial molar heat capacities (Cp,2) of DPnP in the mixtures with water were calculated. Analyzing changes in the course of Cp,2=f(x2) function, the boundary of transition from a homogeneous solution was determined, in which the monomers of amphiphile dominate, to the region, in which aggregates of the cluster type appear.http://dx.doi.org/10.1155/2015/932819 |
| spellingShingle | Mariola Tkaczyk Henryk Piekarski Paweł Góralski Phase Behavior and Heat Capacity of {DPnP + Water} Mixtures at the Temperature Range of 273.15–338.15 K Journal of Chemistry |
| title | Phase Behavior and Heat Capacity of {DPnP + Water} Mixtures at the Temperature Range of 273.15–338.15 K |
| title_full | Phase Behavior and Heat Capacity of {DPnP + Water} Mixtures at the Temperature Range of 273.15–338.15 K |
| title_fullStr | Phase Behavior and Heat Capacity of {DPnP + Water} Mixtures at the Temperature Range of 273.15–338.15 K |
| title_full_unstemmed | Phase Behavior and Heat Capacity of {DPnP + Water} Mixtures at the Temperature Range of 273.15–338.15 K |
| title_short | Phase Behavior and Heat Capacity of {DPnP + Water} Mixtures at the Temperature Range of 273.15–338.15 K |
| title_sort | phase behavior and heat capacity of dpnp water mixtures at the temperature range of 273 15 338 15 k |
| url | http://dx.doi.org/10.1155/2015/932819 |
| work_keys_str_mv | AT mariolatkaczyk phasebehaviorandheatcapacityofdpnpwatermixturesatthetemperaturerangeof2731533815k AT henrykpiekarski phasebehaviorandheatcapacityofdpnpwatermixturesatthetemperaturerangeof2731533815k AT pawełgoralski phasebehaviorandheatcapacityofdpnpwatermixturesatthetemperaturerangeof2731533815k |