On the origin of the multiple melting observed after isothermal crystallization of homogeneous ethylene/1-octene copolymers

S. Rabiej

Published : 2022-09-01

Vol. 49 No. 6 (2004)

On the origin of the multiple melting observed after isothermal crystallization of homogeneous ethylene/1-octene copolymers

S. Rabiej

Abstract

The complex melting behavior of homogeneous ethylene/1-octene copolymer isothermally crystallized at 93 °C was studied by means of DSC and time resolved SAXS and WAXS. Two melting peaks, observed in DSC during heating after the isothermal crystallization, point to the existence of two populations of crystals of different thermal stability. This hypothesis is confronted and supported with the results of SAXS and WAXS investigations. Two populations of crystals are created due to segregation of more branched (of higher 1-octene content) parts of copolymer chains into separate areas in the melt. More stable crystals, melting at higher temperatures, are formed at the beginning of crystallization. Less stable ones originate later in the areas enriched with 1-octene, segregated away from the growth front during primary crystallization. No evidences on the existence of isolated fringed micellar crystallites were found. The crystals of each group are of lamellar type. All lamellae show the same thickness. The difference in their thermal stability, as revealed by two melting peaks in DSC curves, most probably results from different state of their basal surfaces.

Keywords

kopolimery jednorodne ; kopolimery ety-len/1-okten ; morfologia ; krystalizacja izotermiczna ; topnienie wielokrotne ; dyfrakcja promieniowania rentgenowskiego ; różnicowa kalorymetria skaningowa ; kalorymetria skaningowa homogeneous copolymers ; ethylene/1-octene copolymers ; morphology ; isothermal crystallization ; multiple melting ; X-ray diffraction ; differential scanning calorymetry

Details

References

Statistics

Authors

Download files

PDF (Język Polski)

Zasady cytowania

Rabiej, S. (2022). On the origin of the multiple melting observed after isothermal crystallization of homogeneous ethylene/1-octene copolymers. Polimery, 49(6), 414-423. Retrieved from https://ichp.vot.pl/index.php/p/article/view/1768

References

Alamo R.G., Mandelkern L: Macromolecules 1989, 22, 1273.

2. Alamo R.G,, Mandelkern L: Macromolecules 1991, 24, 6480.

3. Alamo R. G., Mandelkern L.: Thermochim, Acta 1994, 238, 155,

4. Minic J, Moet A., Hiltner A., Baer E., Chum S. P: J. Appl. Polym, Sci, 1995, 58, 1371.

5. Clas S.D., Heyding R. D., McFaddin D.C, Russell K. E,, Scammell-Bullock M. V,, Kelusky E. C., St-Cyr D. Polym. Sci., Part B: Polym. Phys. Ed 1988, 26, 1271.

6. Peeters M., Goderis B., Vonk C. G., Reynaers H., Mathot V. B. F: J. Polym. Sci, Part B: Polym, Phys, Ed 1997, 35, 2689.

7. Peeters M., Goderis B., Reynaers H., Mathot V. B. F.: J. Polym. Sci, Part B: Polym, Phys. Ed. 1999, 37, 83. 9. 10. n. 13, 14. 15. 16. 18, 19. 20. 21.

8. Vanden Eynde §,, Mathot V. B. F, Koch M. H, J, Reynaers H.: Polymer 2000, 41, 3437.

9. Mathot V. F. B., Scherrenberg, R. L. Pijpers T. F. J. Polymer 1998, 39, 4541.

10. Goderis B., Reynaers H., Koch M. H. J.. Mathot V. B. F: J. Polym. Sci., Part B: Polym. Phys. Ed. 1999, 37, 1715,

11. Goderis B., Peeters M,, Mathot V. B. F, Koch M. H. J. Bras W,, Ryan A. J., Reynaers H.: J. Polym. Sci, Part B: Polym. Phys. Ed. 2000, 38, 1975.

12.Alizadeh A., Richardson L., Xu J., McCartney S., Marand H., Cheung W., Chum S.: Macromolecules 1999, 32, 621.

13. Crist B,, Claudio E.: Macromolecules 1999, 32, 8945

14. Okui N., Kawai T: Makromol. Chem. 1972, 154, 161.

15. Puig C,, Aviles M., Joskowicz P., Diaz A.: J. Appl. Polym, Sci. 2000, 79, 2022,

16. Goderis B., Reynaers H., Koch M. H.: J Macromolecules 2002, 35, 5840,

17. Hunter B. K,, Russel K. E,, Scammel M. U., Thompson S. L.: J. Polym. Sci, Part A: Polym, Chem Ed. 1984, 22, 1383,

18. Mathot V. B, F.. Pijpers M. F. J.: J. Therm. Anal. 1983, 28, 349.

19. Internet:
Crossref /~athas.

20. Koch M. H. J., Bordas J: Nucl. Instrum. Methods 1983, 208, 461.

21. Boulin C.J., Kempf R., Gabriel A, Koch M. H. J: Nucl. Instrum. Methods Phys. Res. 1988, A269, 312

22. Rapp G., Gabriel A., Dosiere M., Koch M. H. J.: Nucl. Instrum, Methods 1995, A357, 178.

23. Kelleus M,, Meeussen W., Gerkhe R., Reynaers H.: Chem. Phys, Lipids 1991, 58, 131.

24. Boulin C., Kempf R., Koch M. H. J., Mc Laughlin S. Mc: Nucl. Instrum. Methods 1986, A249, 399.

25. Strobl G. R,, Schneider M. J. Polym. Sci., Part B: Polym, Phys. Ed. 1980, 18, 1343,

26. Ruland Wi: J. Appl. Cryst. 1971, 4, 70.

27. Vonk C. G. J. Appl. Cryst. 1973,6, 81

28. Swan P. R. J. Polym. Sci. 1960, 42, 525.

29. Rabiej M.: Polimery 2002, 47, 423. |.

30. Alexander L. E.: "X-ray Diffraction Methods in Polymer Science”, Wiley, New York, 1969.

31. Vonk C. G., Reynaers H.: Polym. Comm. 1990, 31, 190.

32. Howard P. R,, Crist B.: J. Polym. Sci, Part B: Polym. Phys. Ed. 1989, 27, 2269.

33. Cole E., Holmes D.: J. Polym. Sci. 1960, 46, 245.

34. Baker C., Mandelkern L.: Polymer 1966, 7,71.

35. Shirayama K,, Kita S. L, Watabe H.: Makromol. Chem, 1972, 151, 97.

36. Preedy J.: Br. Polym. J. 1973, 5,13.

37. Davis G. T., Weeks J. J., Martin G. M., Eby R. K.: J. Appl. Phys. 1974, 41, 4175.

38. Hoffman J. D., Davis G. T, Lauritzen J. 1 in “Trentise onSolid State Chemistry” (Ed. Hannay N. 8B.) Plenum Press, vol. 3, NewYork1976.

31. Vonk C. G., Reynaers H.: Polym. Comm. 1990, 31, 190.

32. Howard P. R,, Crist B.: J. Polym. Sci, Part B: Polym. Phys. Ed. 1989, 27, 2269.

33. Cole E., Holmes D.: J. Polym. Sci. 1960, 46, 245.

34. Baker C., Mandelkern L.: Polymer 1966, 7,71.

35. Shirayama K,, Kita S. L, Watabe H.: Makromol. Chem, 1972, 151, 97.

36. Preedy J.: Br. Polym. J. 1973, 5,13.

37. Davis G. T., Weeks J. J., Martin G. M., Eby R. K.: J. Appl. Phys. 1974, 41, 4175.

38. Hoffman J. D., Davis G. T, Lauritzen J. 1 in “Trentise onSolid State Chemistry” (Ed. Hannay N. 8B.) Plenum Press, vol. 3, NewYork1976.

">Google Scholar

Citing articles via

Statistics

Total abstract views : 21

PDF Downloads : 12