Surface formation and environmental responses on polyurethane-polystyrene graft copolymers

Abstract

The surfaces of polyurethane (PU)-polystyrene (PS) graft copolymers having a defined content of uniform-size polystyrene graft segments were studied in both dry and wet states. XPS inspection of PU-PS graft copolymer film samples indicated the enrichment of the PS component at the surface in the dry state. The sample films were then immersed in water, and the environmental response at the surface was examined by means of a contact angle measurement using a CCI₄ in water technique. The contact angle underwent a slow, but measurable change from one near to that of the PS homopolymer toward that of the PU homopolymer within a 3 h period for the graft copolymer samples annealed at 80 C. On the other hand, the contact angle remained close to that of the PU homopolymer within a 3 h period for samples annealed at 120'C.

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References

[1] Andrade J D (ed) 1988 Polymer Surface Dynamics (New York: Plenum)

[2] Tezuka Y 1990 Hyomen 28 821-821

[3] Lehah M D and Cooper S L (eds) 1986 Polyurerthanes in Medicine (Boca Raton, FL: Chemical Rubber Company)

[4] Takahara A 1992 Modern Approaches to Wettability: Theory and Applications ed M E Schrader and G Loeb (New York: Plenum) p 179-179

[5] Tezuka Y , Ono T and Imai K 1980 J. Colloid Interface Sci. 136 408-408

[6] Tezuka Y , Kazama H and Imai K 1991 J. Chem. Soc. Faraday Trans. 87 147-147

[7] Tezuka Y , Yoshino M and Imai K 1991 Langmuir 7 2860-2860

[8) Tezuka Y , Kazama H , Ono T and Imai K 1991 Kobunshi Ronbunshu 48 227-227

[9] Tezuka Y and Araki A 1993 Polymer 34 5180-5180

10.

[10] Brandrup J and Immergut E H (eds) 1989 Polymer Handbook 3rd edn (New York: Wiley-Interscience)

11.

[11] Tezuka Y and Araki A 1994 Langmuir 10 1865-1865

12.

[12] Tezuka Y , Fukushima A , Matsui S and Imai K 1986 J. Colloid Interface Sci. 114 16-16

13.

[13] Tezuka Y , Okabayashi A and Imai K 1991 J. Colloid Interface Sci. 141 586-586

14.

[14] Hasegawa H and Hashimoto T 1992 Polymer 33 475-475

15.

[15] Jones P A and Kramer E J 1993 Polymer 34 115-115

16.

[16] Budkowski A , Klein J , Steiner U and Fetters L J 1993 Macromolecules 26 2470-2470

17.

[17] Meyers G F , DeKoven B M and Seitz J T 1992 Langmuir 8 2330-2330

18.

[18] Annis B K , Schwark D W , Reffner J R , Thomas E L and Wunderlich B 1992 Makrotol. Chem. 193 2589-2589

19.

[19] Mayes A M 1994 Macromolecules 27 3114-3114

20.

[20] Reiter G 1994 Macromolecules 27 3046-3046