Arborescent Polymers: Highly Branched Homo-and Copolymers with Unusual Properties
ABSTRACT High molecular weight dendritic polymers were synthesized using anionic polymerization and grafting. Aborescent polystyrenes
with branching functionalities varying from 5E4-5E8, weight average molecular weights of 14-22 000 and low polydispersity
indices (PDI less than 1.2) were obtained. Unusual physical properties, consistent with a rigid sphere morphology, resulted
from the very compact structure of these materials. The grafting technique was extended to the preparation of amphiphilic
copolymers incorporating an aborescent polystyrene core with end linked poly(ethylene oxide) segments by a grafting from scheme. Copolymers with a high polyisoprene content were also obtained by a grafting onto scheme.