S. A. Umoren, I. U Umoren, A. S. Johnson


The effect of metal soaps of Hura crepitans seed oil prepared using Cd, Ba, Zn and Ca salts on thermal stability of unplasticised polyvinyl chloride (UPVC) films obtained by solvent casting is reported. The results show that the derivatives of the seed oil exert stabilizing effect on the UPVC against thermal degradation. The effectiveness of the metal soaps was found to be in the order: Cd > Ba > Zn > Ca. The mechanism of stabilization may probably be due to the replacement of labile chlorine atoms within the polymer structure with carboxylate groups which are more stable to heat treatment.



M. Onozuka, M. J. Asahina, Macromol. Sci. Rev. Macromol. Chem. C3, (1963) 235.

E. J. Arlaman, J. Polym. Sci. 12 (1954) 247.

D. Braun, W. Quary, Angew Makromol. Chem. 29/30 (1973) 163.

F. A. Bovey, K. B. Abbas, F. C. Schilling, W. H. Starnes, Macromolecules, 8 (1975) 437.

G. S. Park, J. Macromol. Sci. Phys. B14 (1977) 151.

F. E. Okieimen, Nig. J. Chem. Res. 4 (1999) 23.

N. A. Mohamed, Polym. Degrad. Stability 56 (1997) 317.

N. A. Mohamed, W. M. Al-Magribi Polym. Degrad. Stability 78 (2002) 149-165.

M.W. Sabaa, N.A. Mohamed, Kh. D. Khalil, A.A. Yassin, Polym. Degrad. Stability 70 (2000) 121.

M. W. Sabaa, R. R. Mohamed, A. A. Yassin, Polym. Degrad. Stability 81 (2003) 37.

H. I. Gokcel, D. Balkose, U. Kokturk, Eur. Polym. J. 35 (1999) 1501.

N.A. Mohamed, M. W. Sabaa, E. H. Oraby, A. A. Yassin, Polym. Degrad. Stability 76 (2002) 355.

F. E. Okieimen, O. C. Eromonsele, J. Appl. Polym. Sci. 77 (2000) 1432.

N.A. Mohamed, M. W. Sabaa, Kh. D. Khalil, A. A. Yassin, Polym. Degrad. Stability 71 (2001) 53.

F. E. Okieimen, Ind. Crops Products 15 (2002) 71.

T. O. Egbuchunam, D. Balköse, F. E. Okieimen, Polym. Degrad. Stability 92 (2007) 1572.

J. Hutchinson, The families of Flowering Plants, 3rd ed., Oxford Clarenden Press, 1973, p31.

S. A. Umoren, K. K. Ajibesin, D. N. Bala, J. Nat. Appl. Sci. 2 (2001) 73.

D. R. Knapp, Handbook of Analytical Derivation Reactions. John Wiley & Sons, Chichester, 1979.

H. F. Mark, N. M. Bixales, N. G. Gaylord, Encyclopadiae of Polymer Science and Technology, New York, 1966,.Vol. 6, p771.

I. E. Ezeh, S. A. Umoren, E. E. Essien, A. P. Udoh, Ind. Crops Products, 36 (2012) 94.

A. W. Birley, M. J. Scott, Plastics Material: Properties and Applications, Leonard Hill, Glsagow, 1982, p122.

K. B. Abbas, E. M. Sorvik, J. Vinyl Technol. 2 (1980) 8.

T. V. Hoang, A. Michael, A. Guyot , Eur. Polym. J. 12 (1976) 337.

V. N. Kuleznev, V. A. Shershnev, The Chemistry and Physics of Polymers, Mir Publishers, Moscow,1990, p252.

E. M. Katchy, Introduction to Polymer Technology, EL’DEMAK, Enugu, Nigeria, 2000, p60.

A. H. Frye, R. W. Horst, J. Polym. Sci. 40 (1959) 419.

A. H. Frye, Horst, R. W. J. Polym. Sci. 45 (1960) 1.

Full Text: PDF


  • There are currently no refbacks.

Bookmark and Share

Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.