Reometryczne badania procesu sieciowania polietylenu i kopolimerów etylenu wobec nadtlenków. Cz. III. Wpływ stężenia i rodzaju nadtlenku na szybkość procesu

M. Uhniat; S. Kudła; M. Zemlak; W. Balcerowiak

Published : 2022-09-01

Vol. 49 No. 3 (2004)

Rheometric studies on the process of polyethylene or its copolymers' crosslinking in the presence of peroxides. Part III. Effects of the concentration and type of peroxide on the process rate

M. Uhniat S. Kudła M. Zemlak W. Balcerowiak

Abstract

Kinetics of the processes of low density polyethylene (PE-LD) crosslinking in the presence of three commercial organic peroxides: dicumyl (Di-Cup R), t-butylcumyl (Interox BCUP) or 2,5-dimethyl-2,5-di-(t-butylperoxy)-hexyne (Interox DYBP) ones were compared using rheometric method. Ranges of the peroxides themselves decompositions temperatures were determined using TA-TG and DSC methods. All of them underwent thermal decompositions in the range of temperature 170-200 °C (Table 1, Figs. 1 and 2). Rheometric studies on PE-LD crosslinking process were carried out in the range of temperature 170-200 °C in the presence of peroxides used in concentrations from 1.0 to 3.0 wt. %. Scheme of crosslinking process with the model of kinetic equation resulted from it, related to non-branched chain reactions, were assumed in kinetic considerations. All this enabled to determine the kinetic equation coefficients [equation (12), Table 31 from characteristic parameters of rheometric curves (Table 2) and then to determine rate constants of torque changes (k(x)) in the crosslinking process (Table 4) as well as activation energies (E(a)) of the processes activated with one of three chosen peroxides (Table 5). Dicumyl peroxide appeared to be most effective in the crosslinking process in the temperature range investigated. It allowed reaching the highest values of maximal torque (M(max)) during the shortest time and E(a) of the process was 119.2 kJ/mol. E(a), values of crosslinking processes in the presence of the other peroxides were significantly higher, while M(max) values were in those cases approximately twice lower than M(max) values reached in the presence of dicumyl peroxide.

Keywords

polietylen ; reometria ; sieciowanie ; nadtlenki organiczne ; kinetyka ; energia aktywacji polyethylene ; rheometry ; crosslinking ; organic peroxides ; kinetics ; activation energy

Details

References

Statistics

Authors

Download files

PDF (Język Polski)

Zasady cytowania

Uhniat, M., Kudła, S., Zemlak, M., & Balcerowiak, W. (2022). Rheometric studies on the process of polyethylene or its copolymers’ crosslinking in the presence of peroxides. Part III. Effects of the concentration and type of peroxide on the process rate. Polimery, 49(3), 180–186. Retrieved from https://polimery.ichp.vot.pl/index.php/p/article/view/1740

References

Uhniat M., Zemlak M., John J., Szulc R.: Polimery 2003, 48, 709.

2. Uhniat M., Zemlak M., Kudla S.. Balcerowiak W.: Polimery 2003, 48, 816,

3. Coran A. Y,: Rubber Chem. Technol. 1964, 37, 689.

4. Manley T, R., Quayyum M. M.: Polymer 1973, 14, 136.

5. Simunkova D., Rado R., Mlejnck O.: J. Appl. Sci. 1970, 14, 1825.

6. Manley T. K, Qayy um M. M.: Polymer 1971, 12, 177.

7. Borsig E., Szocs F.: Polymer 1982, 22, 1400.

8. Boer J., Pennings A. J.: Polymer 1982, 23, 1944.

9. Kampouris E. M., Andreopoulos A. G.: T. MA, Sri, 1987, 34, 1216.

10. Mikheev Y. A.: Khim Fiz. 1991,10, 715.

11. Navarra S., Maillard B.: J. Myra. Sci., Part A: Polym_ Chem. 2000, 38, 2957.

12. Abraham D., George K. E., Francis D. J.: lingo). Milkromal. Chem. 1992,200, 15.

13. Vogel J., Heinze C.I Angew. Makromal Chem. 1993, 207, 157.

14. Kapishnikov Y. V., Kalinins M.: Modifir. Polimer. Mater. (Riga) 1980, 9, 30.

15. Kapishnikov Y. V., Kalinins M.: Latv. PSR Zinat. Akad. Vestis, Ser. 1981, 2, 195.

16. Yamazaki T., Seguchi T.: I. Part A: Polym. Cheer. 1997, 35,279.

17. Yamazaki T., Seguchi T.: Sci., Part A: Polym. Chem, 1999, 37, 349.

18. Yamazaki T., Seguchi T.: J, Polym. Sci., Part A: Polym. Chem. 2000, 38, 3099.

19. Kurian P. F., George K. E., Francis D. J.: Eur. Polym. J. 1992, 28, 13.

20. Nawarre S., Maillard B.: J. Polym, Sci., Part A: Myra, Chem. 2000, 38, 2963.

21. Kim D. Hoo: Pollimo 1 98 4, 8, 44; wg C.A. 1984, 100:192 473.

22. Abraham D., George K. E., Francis D. J.: I. Appl, Polym. Sci, 1998, 67, 789.

23. Pigoń K. Ruziewicz Z.: „Chemia fizyczna", PWN, Warszawa 1981.

24. Kunert K A.: „Chemiczne sieciowanie polietylenu", IPPT PAN, 1976,

25. Porejko S., Fejgin Zakrzewski L.: „Chemia związków wielkocząsteczkowych", WNT, Warszawa 1974.

26. Encyclopedia of Polymer Science and Engineering, t. 6., John Wiley and Sons, Nowy Jork 1985, 387-389,

27. Informacja techniczna na temat nadtlenków organicznych INTEROX, firmy Peroxid-Chemie GmbH (1990),

Google Scholar

Citing articles via

Statistics

Total abstract views : 0

PDF Downloads : 0

M. Uhniat polimery@ichp.pl

Affiliation
Instytut Ciężkiej Syntezy Organicznej Blachownia, ul. Energetyków 9, 47-225 Kędzierzyn-Koźle

S. Kudła

Affiliation
Instytut Ciężkiej Syntezy Organicznej Blachownia, ul. Energetyków 9, 47-225 Kędzierzyn-Koźle

M. Zemlak

Affiliation
Instytut Ciężkiej Syntezy Organicznej Blachownia, ul. Energetyków 9, 47-225 Kędzierzyn-Koźle

W. Balcerowiak

Affiliation
Instytut Ciężkiej Syntezy Organicznej Blachownia, ul. Energetyków 9, 47-225 Kędzierzyn-Koźle