불포화폴리에스테르 수지/실록산-에스테르 공중합체 블렌드의 표면특성

장영욱; 정용주; 김동국; 정진수

Journal of the Korean Industrial and Engineering Chemistry, Vol.10, No.1, 93-97, February, 1999

Export Citation

불포화폴리에스테르 수지/실록산-에스테르 공중합체 블렌드의 표면특성

Surface Properties of Unsaturated Polyester Resin/Siloxane-ester Copolymer Blends

장영욱, 정용주, 김동국, 정진수

초록

불포화폴리에스테르 수지의 표면에너지를 저하시키기 위하여 실록산-에스터 공중합체를 소량 첨가하였다. 실록산-에스터 공중합체는 diol로써 ethylene glycol(EG)과 hydroxy terminated polydimethylsiolxane(PDMS)을, diacid로써 maleic anhydride (MA)와 phthalic anhydride(PA)를 축중합반응시켜 합성하였다. 경화된 블렌드의 표면성질은 동적접촉각(dynamic contact angles)측정, 점착테이프의 peel 강도측정 및 X-ray photoelectron spectroscopy(ESCA)등을 통하여 분석하였다. 블렌드에서 공중합체의 첨가량이 증가하고, 공중합체내의 PDMS 함량이 증가함에 따라 물에 대한 advancing 접촉각 및 receding 접촉각이 증가하였으며, 점착테이프의 peel 강도는 급격히 감소하였다. ESCA분석결과 실록산 세그멘트가 공기쪽 표면층에 주로 존재하고 있음을 알 수 있었다.

In order to lower the surface energy of unsaturated polyester(UPE) resin, small amount of siloxane-ester copolymers were incorporated. The copolymers were synthesized by a condensation polymerization using ethylene glycol and hydroxy termintated polydimethylsiloxane as diols and maleic anhydride and phthalic anhydride as dibasic acids. The modified UPE resin surface was characterized by dynamic contact angle (DCA), peel strength measurements of pressure sensitive adhesives and X-ray photoelectron spectroscopy(ESCA). As the copolymer content in the blend and PDMS content in the copolymer are increased, both advancing and receding contact angles against water are increased. The strength required to peel-off the pressure sensitive adhesive tape from the modified UPE resin decreased dramatically with the addition of the copolymer. ESCA results indicated that polydimethylsiloxane segments are predominated at the outer surface of the modified UPE resin.

Keywords:PDMS;Surface Energy;Dynamic Contact Angle;Peel Strength;ESCA

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[1] Lubin G, "Handbook of Fiberglass and Advanced Plastics Composites," Van Nostrand Reinhold, New York (1969)

[2] Yilgor I, McGrath JE, Adv. Polym. Sci., 86, 1 (1988)

[3] Garbassi F, Morra M, Occhiello E, "Polymer Surfaces," John Wiley & Sons, New York (1994)

[4] Bruins PF, "Silicone Technology," Wiley, New York (1970)

[5] Chujo Y, J. Polym. Sci. A: Polym. Chem., 27, 1907 (1989)

[6] Gorelova MM, Pertsin AJ, Volkov IO, Filimonova LV, Makarova LI, Zhdanov AA, J. Appl. Polym. Sci., 57(2), 227 (1995)

[7] McGrath JE, Dwight DW, Riffle JS, Davision TF, Webster DC, Visvanathan R, Polym. Prepr., 20, 528 (1979)

[8] Yilgor I, Warren P, Steckle JR, Yilgor E, Freelin G, Riffle J, J. Polym. Sci. A: Polym. Chem., 27, 3673 (1989)

[9] Patel NM, Dwight DW, Hedrick JL, Webster DC, McGrath JE, Macromolecules, 21, 2689 (1988)

[10] Kasemura T, Komatu C, Nishihara H, Takahashi S, Oshibe Y, Ohmura H, Yamamoto T, J. Adhes., 47(1), 17 (1994)

[11] Kasemura T, Takahashi S, Nishihara K, Komatu C, Polymer, 34, 3416 (1993)

[12] Andrade JD, Smith LM, Gregonis DE, "Surface and Interfacial Aspects of Biomedical Polymers," Vol. 1, Surface Chemistry and Physics, J.D. Andrade, Ed., Plenum Press, New York (1985)

[13] Young T, Phil. Trans., 95, 82 (1805)