화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.32, No.4, 366-371, July, 2008
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리빙/조절 양이온중합에 의한 알파메틸스티렌 호모중합 및 이소부틸렌과의 블록공중합에 대한 반응속도론 연구
Kinetic Studies on Homopolymerization of α-Methylstyrene and Sequential Block Copolymerization of Isobutylene with α-Methylstyrene by Living/Controlled Cationic Polymerization
YiboWu1, 2, WenliGuo2, †, ShuxinLi2, HuiqingGong1
  • 1Beijing University of Chemical Technology College of Material Science and Engineering, Beijing, 100029
  • 2Beijing Institute of Petrochemical Technology Department of Material Science and Engineering, Beijing, 102617
Yibo Wu1, 2, Wenli Guo2, †, Shuxin Li2, and Huiqing Gong1
  • 1College of Material Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
  • 2Department of Material Science and Engineering, Beijing Institute of Petrochemical Technology, Beijing, 102617, China
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The controlled/living cationic polymerization of α-methylstyrene (αMeSt) and sequential block copolymerization of isobutylene (IB) with αMeSt were achieved using 2-chloro-2,4,4-trimethylpentane (TMPCl)/titanium tetrachloride (TiCl4)/titanium isopropoxide (Ti(OiPr)4)/2,6-ditert-butylpyridine (DtBP) initiating system in CH3Cl/hexane (50/50 v/v) solvent mixture at -80 ℃.The polymerization rate decreased with increasing [Ti(OiPr)4]/[TiCl4] ratio in the homopolymerization of αMeSt. The effects of [Ti(OiPr)4]/[TiCl4] ratios and PIB+ molecular weight on the polymerization rate and blocking efficiency were also investigated. Well-defined poly(isobutylene-b-α-methylstyrene)s were demonstrated by 1H-NMR and triple detection SEC; refractive index (RI), multiangle laser light scattering (MALLS) and ultraviolet (UV) detectors. Blocking efficiencies for the poly(isobutylene-b-α-methylstyrene)s of almost 100% were obtained when αMeSt was induced by PIB’s of Mn ≥ 41000 at [Ti(OiPr)4]/[TiCl4]=1. Differential scanning calorimetry (DSC) of the block copolymers showed two glass transition temperatures, thereby demonstrating microphase separation.
Keywords:controlled/living carbocationic polymerization;poly(α-methylstyrene);kinetics;poly(isobutylene-b-α-methylstyrene)
  1. Kwon Y, Faust R, J. Macromol. Sci.-Pure Appl. Chem., A42, 385 (2005)
  2. Fodor Z, Faust R, J. Macromol. Sci.-Pure Appl. Chem., A35, 375 (1998)
  3. Kwon Y, Cao XY, Faust R, Macromolecules, 32(21), 6963 (1999)
  4. Xu X, Wu YX, Qiu YX, Dong CL, Wu GY, Eur. Polym. J., 42, 2791 (2006)
  5. Puskas JE, Sohel S, Kevin ZY, Kim B, Gabor K, Eur. Polym. J., 41, 1 (2005)
  6. Kwon Y, Puskas JE, Eur. Polym. J., 40, 119 (2004)
  7. Puskas JE, Chen Y, Tomkins M, Eur. Polym. J., 39, 2147 (2003)
  8. Zhou YH, Faust R, Chen SJ, Gido SP, Macromolecules, 37(18), 6716 (2004)
  9. Hassen B, Abhijit S, Laszlo S, Faust R, J. Macromol. Sci.-Pure Appl. Chem., A44, 359 (2007)
  10. Hadjikyriacou S, Faust R, Macromolecules, 28(23), 7893 (1995)
  11. Fodor Z, Faust R, J. Macromol. Sci.-Pure Appl. Chem., A32, 575 (1995)
  12. Sipos L, Som A, Faust R, Biomacromolecules, 6(5), 2570 (2005)
  13. Zhou YH, Faust R, Richard R, Schwarz M, Macromolecules, 38(20), 8183 (2005)
  14. Li DW, Faust R, Macromolecules, 28(5), 1383 (1995)
  15. Sipos L, Cao XY, Faust R, Macromolecules, 34(3), 456 (2001)
  16. De P, Sipos L, Faust R, Moreau M, Charleux B, Vairon JP, Macromolecules, 38(1), 41 (2005)