✦ LIBER ✦

Dendrigraft polystyrene initiated by poly(p-chloromethyl styrene): synthesis and properties

✍ Scribed by Zhang, Xi; Chen, Yongming; Gong, Aijun; Chen, Chuanfu; Xi, Fu

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 158 KB
Volume: 48
Category: Article
ISSN: 0959-8103
DOI: 10.1002/(sici)1097-0126(199909)48:9<896::aid-pi248>3.0.co;2-g

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✦ Synopsis

Dendrigraft polystyrene was prepared using poly(p-chloromethyl styrene) as the multicentre initiator by atom transfer radical polymerization (ATRP). The resulting polymer was characterized with light scattering, intrinsic viscosity, thermal analysis and atomic force microscopy (AFM) imaging. The AFM image showed there were two kinds of different structural dendrigraft polystyrenes in the product, ie the coupling' dendrigraft polystyrene and free' dendrigraft polystyrene. The `coupling' structure might result from the coupling reaction of growing radical chain ends. The second virial coef®cient A 2 and intrinsic viscosity of the dendrigraft polystyrene were smaller than those of the relative linear and twelve-arm star polystyrene, and the thermal analysis showed that the initial decomposition temperature was a little higher than that of linear polystyrene.

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