Article
  • Kinetic Studies on Homopolymerization of α-Methylstyrene and Sequential Block Copolymerization of Isobutylene with α-Methylstyrene by Living/Controlled Cationic Polymerization
  • Wu Y, Guo W, Li S, Gong H
  • 리빙/조절 양이온중합에 의한 알파메틸스티렌 호모중합 및 이소부틸렌과의 블록공중합에 대한 반응속도론 연구
  • Wu Y, Guo W, Li S, Gong H
Abstract
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)

References
  • 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)
  •  
  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2022 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2008; 32(4): 366-371

    Published online Jul 25, 2008

  • Received on Feb 29, 2008
  • Accepted on May 17, 2008