Synthesis and characterization of isotactic poly(p-hydroxystyrene)- block-1,4-trans-polybutadiene by sequential monomer addition using titanium complex with an [OSSO]-type Bis(phenolate) ligand

  • HuaQing Liang
  • Sihan Li
  • Dong Liu
  • Yijun Liu
  • YongJiang Long
  • GuoDong Liang
  • FangMing ZhuEmail author


Herein, we demonstrated the synthesis and characterization of a well-defined diblock copolymer consisting of isotactic poly(p-hydroxystyrene) (iP(p-HOS)) and 1,4-trans-polybutadiene (1,4-trans-PBD), iP(p-HOS)-b-1, 4-trans-PBD, by the combination of sequential monomer addition and deprotection. Isospecific living polymerization of p-tert- butyldimethylsilyloxystyrene and living trans-1,4-polymerization of 1,3-butadiene were catalyzed by 1, 4-dithiabutandiyl-2, 2ʹ-bis(6-cumenyl-4-methylphenoxy) titanium dichloride (complex 1) activated by methylaluminoxane (MAO) at room temperature to provide highly stereospecific isotactic poly(p-tert-butyldimethylsilyloxystyrene) (iP(p-TBDMSOS)) and 1,4-trans-polybutadiene (1,4-trans-PBD) with narrow molecular weight distribution. Furthermore, the iP(p-TBDMSOS)-b-1, 4-trans-PBD was prepared via sequential monomer addition in the presence of complex 1 and MAO. The deprotection of the iP(p-TBDMSOS) block was promoted by concentrated hydrochloric acid to produce iP(p-HOS)-b-1, 4-trans-PBD. In addition, the resultant diblock copolymer and intermediate polymers were characterized by gel permeation chromatography, nuclear magnetic resonance and differential scanning calorimeter.


Isotactic poly(p-tert-butyldimethylsilyloxystyrene) 1,4-trans-polybutadiene Isotactic poly(p-hydroxystyrene) Diblock copolymer Sequential monomer addition Deprotection 



This work was supported by the National Natural Science Foundation of China (21174167, 51573212) and the NSF of Guangdong Province (S2013030013474, 2014A030313178).


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Copyright information

© The Polymer Society, Taipei 2018

Authors and Affiliations

  • HuaQing Liang
    • 1
  • Sihan Li
    • 1
  • Dong Liu
    • 1
  • Yijun Liu
    • 1
  • YongJiang Long
    • 1
  • GuoDong Liang
    • 1
    • 2
  • FangMing Zhu
    • 1
    • 2
    Email author
  1. 1.GDHPPC Lab, School of ChemistrySun Yat-sen UniversityGuangzhouChina
  2. 2.Key Lab for Polymer Composite and Functional Materials of Ministry of Education, School of ChemistrySun Yat-sen UniversityGuangzhouChina

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