高等学校化学研究 ›› 1999, Vol. 15 ›› Issue (4): 358-363.
CHENG Guang-lou, HU Chun-pu, YING Sheng-kang
CHENG Guang-lou, HU Chun-pu, YING Sheng-kang
摘要: The polymerization 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=ClorBr) have been studied and examined. In a CuCl/bpy/RCl/St system, a bimodal GPCpeak at the early stage of polymerization was observed, 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/phen/RBr/St system.