Physico-chemical behavior in solution of star-shaped polystyrene with a C60 core

C60 fullerene-containing polymer stars in mixed matrix membranes

“…Preparation of C 60 (PS) 6 and C 60 (PS) 6 (P2VP-PTBMA) 6 star shaped macromolecules through covalent binding of the fullerene molecule with polymer chains prevents agglomeration of the modified nanoparticles and leads to their dispersion on the molecular level in the PPO matrix. PS and PPO blends are completely inter-soluble and the phase separation of these blends does not occur up to the temperature of their thermal destruction [11].…”

“…Fig. 2 shows that the inclusion of star modifiers in the PPO matrix leads to changes in the top surface and cross-section structures of membranes containing 5 wt% C 60 (PS) 6 or C 60 (PS) 6 (P2VP-PTBMA) 6 . Figure 2(b) shows that the inclusion of C 60 (PS) 6 stars in the PPO matrix does not affect the top surface structure as compared to the PPO membrane ( Fig.…”

“…The six PS arms star on C 60 branching center C 60 (PS) 6 and twelve-arms hybrid star C 60 (PS) 6 (P2VP-PTBMA) 6 (Fig. 1) were prepared by synthesis [9,10].…”

“…1. C 60 fullerene-containing polymer stars (1) C 60 (PS) 6 and (2) C 60 (PS) 6 (P2VP-PTBMA) 6 The composites containing 1, 3, and 5 wt% PPO/C 60 (PS) 6 or PPO/C 60 (PS) 6 (P2VP-PTBMA) 6 were prepared by mixing solutions of 3 wt% PPO in chloroform and 3 wt% starshaped polymer in chloroform. Thin film membranes (∼ 40 µm thickness) were obtained by casting the 3 wt% polymer solution in chloroform on a cellophane surface.…”

“…Two samples of modifier were used. They are i) six-arms star with six polystyrene (PS) arms grafted onto the C 60 branching center (C 60 (PS) 6 ) [6,7] and ii) twelve-arms hybrid star with six PS arms and six copolymer poly(2-vinylpyridine)-block-poly(tert-butylmethacrylate) (P2VP-PTBMA) arms grafted onto C 60 branching center (C 60 (PS) 6 (P2VP-PTBMA) 6 ) [8].…”