Error message

  • Deprecated function: Unparenthesized `a ? b : c ? d : e` is deprecated. Use either `(a ? b : c) ? d : e` or `a ? b : (c ? d : e)` in include_once() (line 1439 of /home/science2016/public_html/includes/bootstrap.inc).
  • Deprecated function: Array and string offset access syntax with curly braces is deprecated in include_once() (line 3557 of /home/science2016/public_html/includes/bootstrap.inc).

Effect of Silica Surface on Thermal Decomposition of the Immobilized Peroxide Oligomers

Maria Tokareva1, Stanislav Tokarev1, Volodymyr Vostres1, Viktor Tokarev1
Affiliation: 
1 Lviv Polytechnic National University 12, S. Bandery St., 79013 Lviv, Ukraine vtokarev@lp.edu.ua
DOI: 
https://doi.org/10.23939/chcht14.02.205
AttachmentSize
PDF icon full_text.pdf400.28 KB

Keywords:

Abstract: 
The thermal decomposition of pendant peroxy groups in a cooligomer of maleic anhydride with 5-(tert-butylperoxy)-5-methylhex-1-en-3-yne as well as in its amino derivatives immobilized on different silica surfaces, has been investigated using a complex thermo-gravimetric analysis. Two types of silica: fumed (aerosil) and precipitated (white carbon black) ones have been surface modified by this cooligomer via diverse techniques. It has been established that in all the cases the cooligomer decomposition on the silica surface complies with the first-order kinetics. Estimated activation energy evidences lowering thermal stability of the immobilized peroxide cooligomer in comparison with its decomposition in a solution. Interestingly, on the surface of fumed silica the decomposition of peroxide cooligomers always occurs as a one-stage process, while on the surface of precipitated silica it can occur as a two-stage process. The reason for this phenomenon is a difference in the porosity and surface chemistry of these two silica samples.
References: 

[1] G. Wypych.: Handbook of Polymers, 2nd edn. Chem.Tec. Publ., Toronto 2016.
[2] Shibanova O., Medvedevskikh Y., Voronov S. et al.: Polym. Sci. Ser. A, 2002, 44, 258.
[3] Barua S., Gogoi S., Khan R., Karak N.: Raw Mater. Appl., 2019, 261. https://doi.org/10.1016/b978-0-12-814615-6.00008-4
[4] Narayan R., Nayak U., Raichur A., Garg S.: Pharmaceutics, 2018, 10, 118. https://doi.org/10.3390/pharmaceutics10030118
[5] Barthel H., Rosch L., Weis J.: Fumed Silica ‐ Production, Properties, and Applications [in:] Auner N., Weis J., Organosilicon Chemistry II: From Molecules to Materials, 1996, 761-778. https://doi.org/10.1002/9783527619894.ch91
[6] Lazareva S., Shikina N., Tatarova L., Ismagilov Z.: Eurasian Chem. Technol. J., 2017, 19, 295. http://doi.org/10.18321/ectj677
[7] Bergna H.: The Colloid Chemistry of Silica. 1994, ch.1, 1-47. https://doi.org/10.1021/ba-1994-0234.ch001
[8] Ab Rahman I., Vejayakumaran P., Sipaut C. et al.: Mater. Chem. Phys., 2009, 114, 328. https://doi.org/10.1016/j.matchemphys.2008.09.068
[9] Sugawara T., Matsuda T.: Macromolecules, 1994, 27, 7809. https://doi.org/10.1021/ma00104a040
[10] Jung D., Park I., Choi Y. et al.: Langmuir, 2002, 18, 6133. https://doi.org/10.1021/la025558u
[11] de la Vega Oyervides A., Bonilla Ríos J., Ramos de Valle L., Schulte K.: Macromol. Mater. Eng., 2007, 292, 1095. https://doi.org/10.1002/mame.200700201
[12] Maslowski M., Miedzianowska J., Strzelec K.: Cellulose, 2018, 25, 4711. https://doi.org/10.1007/s10570-018-1880-6
[13] Voronov S., Tokarev V., Datsyuk V. et al.: J. Appl. Polym. Sci., 2000, 76, 1228. https://doi.org/10.1002/(SICI)1097-4628(20000523)76:8<1228::AID-APP3>3.0.CO;2-8
[14] Tokarev V., Voronov S., Adler H. et al.: Macromol. Symp., 2002, 187, 155. https://doi.org/10.1002/1521-3900(200209)187:1%3C155::AID-MASY155%3E3.0.CO;2-H
[15] Shevchuk O., Wagenknecht U., Wiessner S. et al.: Chem. Chem. Technol., 2015, 9, 149. https://doi.org/10.23939/chcht09.02.149
[16] Shevchuk O., Bukartyk N., Nadashkevych Z., Tokarev V.: Chem., Technol. Appl. Substances, 2019, 2, 153. https://doi.org/10.23939/ctas2019.01.153
[17] Shafranska O., Tokarev V., Voronov A. et al.: Langmuir, 2005, 21, 3459. https://doi.org/10.1021/la0482453
[18] Rochester C., Yong G.: J. Chem. Soc., 1980, 76, 1158. https://doi.org/10.1039/F19807601158
[19] Dudik О.: Poverhnya, 2013, 5, 112. https://surfacezbir.com.ua/index.php/surface/article/view/
[20] Musa O.: Handbook of Maleic Anhydride Based Materials: Syntheses, Properties and Applications. Springer 2016.
[21] Vilenskaya M., Kharamov D., Sorokin E. et al.: Khim. Promyshlennost, 1970, 7, 399.
[22] Voronov S., Tokarev V., Lastukhin Yu., Oduola K.: J. Appl. Polym. Sci., 2000, 76, 1217. https://doi.org/10.1002/(SICI)1097-4628(20000523)76:8<1217::AID-APP2>3.0.CO;2-F
[23] Robbins D., Almquist A., Timm D. et al.: Macromolecules, 1995, 28, 8729. https://doi.org/10.1021/ma00130a004
[24] Johannsmann D., Reviakine I., Richter R.: Anal. Chem., 2009, 81, 8167. https://doi.org/10.1021/ac901381z