Synthesis and Surface Structure of Polyester-block-Poly(dimethylsiloxane)-block-Polyester Copolymers

Won-Ki Lee; Sang-Bo Park; Jin-Kook Lee

Macromolecular Research, Vol.11, No.2, 128-131, April, 2003

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Synthesis and Surface Structure of Polyester-block-Poly(dimethylsiloxane)-block-Polyester Copolymers

Won-Ki Lee^†, Sang-Bo Park, and Jin-Kook Lee¹

Division of Chemical Engineering, Pukyong National University, San 100, Namgu, Busan 608-739, Korea
¹Department of Polymer Science & Engineering, Pusan National University, San 30, Kumjunggu, Busan 609-735, Korea

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Triblock copolymers of poly(dimethylsiloxane) (PDMS) middle block and degradable polyester end blocks were synthesized by the ring open polymerization initiated by alcohol groups of PDMS. Surface composition of the triblock copolymers is measured by angle-dependent electron spectroscopy for chemical analysis. The PDMS blocks are segregated in the topmost surface region and constituted up to 90 mol% of the surface, even though the overall bulk PDMS concentrations of the block copolymers is 6% or less. This result suggests that the bulk property of degradable polyesters is essentially unchanged due to the high surface segregation of PDMS.

Keywords:poly(dimethylsiloxane);electron spectroscopy for chemical analysis;surface segregation

[References]

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Ha CS, Lee WK, Cho WJ, Ougizawa T, Inoue T, Korea Polym. J., 9(1), 66 (2001)
Lee WK, Doi Y, Ha CS, Macromol. Biosci., 1, 114 (2001)
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[1] Kim CY, Evans J, Goring DAI, J. Appl. Polym. Sci., 15, 1365 (1971)

[2] Bridggs D, Brewis DM, Koniecko MB, J. Mater. Sci., 14, 1344 (1979)

[3] Feng XD, Sun YH, Qin KY, Macromolecules, 16, 2105 (1985)

[4] Kim MK, Yuk SH, Jhon MS, Bull. Korean Chem. Soc., 8, 158 (1987)

[5] Clark MB, Burkhardt CA, Gardella JA, Macromolecules, 22, 4495 (1989)

[6] Chen X, Gardella JA, Kumler PL, Macromolecules, 25, 6621 (1992)

[7] Lee JH, Ju YM, Kim SK, Lee ST, Park YW, Korea Polym. J., 5(3), 199 (1997)

[8] Kim HW, Kim SS, Kim JM, Polym.(Korea), 22(3), 455 (1998)

[9] Lee WK, Jo NJ, Ha CS, Bull. Korean Chem. Soc., 22, 872 (2001)

[10] Lee WK, Losito I, Gardella JA, Hicks WL, Macromolecules, 34(9), 3000 (2001)

[11] Ha CS, Lee WK, Cho WJ, Ougizawa T, Inoue T, Korea Polym. J., 9(1), 66 (2001)

[12] Lee WK, Doi Y, Ha CS, Macromol. Biosci., 1, 114 (2001)

[13] vanKrevelen DW, Properties of Polymers, Elsevier Scietific Publishing Co., New York (1990)

[14] Yilgor I, Steckle WP, Yilgor E, Freelin RG, Riffle JS, J. Polym. Sci. A: Polym. Chem., 27, 3673 (1989)

[15] Chen JX, Gardella JA, Macromolecules, 31(26), 9328 (1998)