화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of the Korean Industrial and Engineering Chemistry, Vol.14, No.5, 569-574, August, 2003
Export Citation
Liquid Silicone Rubber Nanocomposite의 제조와 그 특성
Preparation and Characteristics of Liquid Silicone Rubber Nanocomposite
강두환†, 이권수, 여학규1
  • 단국대학교 고차구조형 유기산업재료 연구센터, 고분자 공학과
  • 1(주)해룡실리콘
Doo Whan Kang†, Kweon Soo Lee, and Hak Gue Yeo1
  • Hyperstructured Organic Materials Research Center,Department of Polymer Science & Engineering, Dankook University, Korea
  • 1HRS Corporation, Korea
E-mail:
초록
Octamethylcyclotetrasiloxane (D4)과 1,3,5-trimethyl-1,3,5-triphenylcyclotrisiloxane (D3Me,Ph)을 1,1,3,3,-tetramethyl-1,3-divinyldisiloxane (MVS)과 평형중합시켜 실리콘의 Si원자에 dimethyl 및 methylphenyl기가 도입된 α,ω-vinyl poly(dimethyl-methylphenyl) siloxane prepolymer (VPMPS)를 제조하였으며, 또한 D4와 1,3,5-trimethylcyclotrisiloxane (D3Me,H)을 1,1,3,3,-tetramethyldisiloxane (MS)와 평형중합시켜 Si원자에 dimethyl 및 methylhydrogen기가 도입된 α,ω-hydrogen poly (dimethyl-methylhydrogen)siloxane prepolymer (HPDMS)를 제조하였다. 제조한 VPMPS 및 HPDMS의 구조를 FT-IR 및 13C-NMR을 측정하여 확인하였다. 1,3,5-trivinyl-1,3,5-trimethylcyclotrisilazane (VMS)로 표면처리한 나노 실리카를 VPMPS 100 hpr에 대해 30 또는 40 phr와 VPMPS, HPDMS 및 촉매를 고속 교반기로 컴파운딩하여 액상 실리콘 고무(liquid silicone rubber, LSR) 나노 복합체를 제조하였다. 이때 VMS의 사용여부에 따른 액상 실리콘 고무의 bound rubber 함량, 점도변화 및 기계적 특성을 측정하여 비교하였다. VMS를 표면처리제로 처리한 나노 실리카를 사용하여 제조한 액상 실리콘 고무 나노 복합체의 bound rubber 함량이 VMS로 처리하지 않은 나노 실리카를 첨가하여 제조한 액상 실리콘 고무 나노 복합체보다 100% 이상 증가되었으며 시간에 따른 점도변화도 거의 없이 안정한 값을 나타내었다. VMS로 표면처리된 나노 실리카를 보강제로 사용함으로써 인장강도, 인열강도 및 모둘러스가 향상되었다.
α,ω-vinyl poly(dimethyl-methylphenyl) siloxane prepolymer (VPMPS) was prepared by the equilibrium polymerization of octamethyl-cyclotetrasiloxane (D4), 1,3,5-trimethyl-1,3,5-triphenylcyclotrisiloxane (D3Me,Ph), and 1,1,3,3,-tetramethyl-1,3-divinyldisiloxane (MVS) as the end-blocker. α,ω-hydrogen poly (dimethyl-methylhydrogen) siloxane prepolymer (HPDMS) was also prepared by the equilibrium polymerization of octamethylcyclotetrasiloxane (D4), 1,3,5-trimethyl cyclotrisiloxane (D3Me,H), and 1,1,3,3-tetramethyldisiloxane (MS). The structures of prepared VPMPS and HPDMS were confirmed by the measurement of FT-IR and 13C-NMR. Liquid silicone rubber(LSR) nanocomposite was prepared by compounding VPMPS, HPDMS, and catalyst in high speed dissolver, after adding 30 and 40 phr of nanosilica modified with 1,3,5-trivinyl-1,3,5-trimethylcyclotrisiloxane (VMS) based on 100 phr of VPMPS. Modification characteristics of nanosilica filler were measured the content of bound rubber and the time changing of viscosity in LSR. The mechanical properties of LSR nanocomposite were measured by UTM.
Keywords:α,ω-vinyl poly(dimethyl-methylphenyl) siloxane;α,ω-hydrogen poly (dimethyl-methylhydrogen) siloxane;liquid silicone rubber;nanosilica
  1. Chapman HL, Lutz MA, Polmanteer KE, Rubber Chem. Technol., 58, 953 (1985)
  2. Polmanteer KE, Lentz CW, Rubber Chem. Technol., 48, 795 (1975)
  3. Okel TA, Waddell WH, Rubber Chem. Technol., 68, 59 (1995)
  4. Wolff S, Wang MJ, Rubber Chem. Technol., 65, 329 (1991)
  5. Vondracek P, Schatz M, Kautsch. Gummi Kunstst., 33, 699 (1980)
  6. Wu J, Shen Z, Chen Y, Hu D, Polym. Polym. Compos., 9, 169 (2001)
  7. Fu LY, Xia XY, Peng XD, Liang LG, J. Polym. Sci. A: Polym. Chem., 9, 3069 (1981)
  8. Vondracek P, Schatz M, J. Appl. Polym. Sci., 21, 3211 (1977) 
  9. Boonstra BB, Cochrane H, Dannenberg EM, Kautsch. Gummi Kunstst., 29, 29 (1976)
  10. Kang DW, Lee KS, Yeo HG, Shim JS, J. Korean Ind. Eng. Chem., 13(6), 594 (2002)
  11. Gilbert AR, Kantor SW, J. Polym. Sci., XI, 35 (1959)
  12. Japan Patent, 平 6-279014