Source: Scifinder Scholar

 

Controlled radical polymerization of styrene in the presence of different copper complexes and organic halides.     Cheng, Guang-Lou; Hu, Chun-Pu; Ying, Sheng-Kang.    Laboratory of Living Polymerization,  East China University of Science and Technology,  Shanghai,  Peop. Rep. China.    Chem. Res. Chin. Univ.  (1999),  15(4),  358-363.  CODEN: CRCUED  ISSN: 1005-9040.  Journal  written in English.    CAN 132:251471    AN 2000:14697    CAPLUS 

 

Abstract

 

The polymn. behaviors of styrene (St) in the presence of CuX/L [X = Cl or Br: L = 2, 2'-bipyridine (bpy), 1,10-phenanthroline (phen) or 4,7-diphenyl-1,10-phenanthroline (DPP) ] and R-X (R = trichloromethyl, benzyl or allyl; X = Cl or Br) have been studied and examd.  Phen and DPP were effective ligands for atom transfer radical polymn. of St.  In a CuCl/bpy/RCl/St system, a bimodal GPC peak at the early stage of polymn. was obsd., and a concept of multi-active species was proposed to explain this phenomenon.  In a CuCl/phen (DPP)/RCl/St system, the Mn of polystyrene (PS) increased linearly with St conversion and ln [M]o/[M] also increased linearly with time, indicating the "living" nature of this system.  Furthermore, the stability of the propagating active species in a CuBr/phen/RBr/St system is higher than that in the CuBr/bpy/RBr/St system.