A novel C60-styrene-maleic anhydride copolymer was prepared with radical polymerization. 50 mg of C60 and 1 g of styrene and 1 g of maleic anhydride were dissolved in 20 mL of o-dichlorobenzene, then was initiated by ...A novel C60-styrene-maleic anhydride copolymer was prepared with radical polymerization. 50 mg of C60 and 1 g of styrene and 1 g of maleic anhydride were dissolved in 20 mL of o-dichlorobenzene, then was initiated by 200 mg of BPO at 70 ℃ under the protection of Ar for 32 h. The copolymer was obtained as a brown solid. The structure of copolymer was characterized by UV and FTIR. GPC analyses shows that its average molecular weight Mw is 13 000. The copolymer is soluble in THF, DMSO and water. The surface tension of 0.5% of copolymer aqueous solution was determined to be 54.6×10-3 N/m（20 ℃）. TEM analyses shows that the copolymer is a kind of water-soluble nanosphere with the average diameter of about 60 nm.展开更多
This paper is the first report on the atom transfer radical copolymerization of unsaturated cyclic acetal, 4,7 dimethyl 2 methylene 1,3 dioxepane(DMMDO) and styrene(St) in the presence of α bromobutyrate as the initi...This paper is the first report on the atom transfer radical copolymerization of unsaturated cyclic acetal, 4,7 dimethyl 2 methylene 1,3 dioxepane(DMMDO) and styrene(St) in the presence of α bromobutyrate as the initiator and CuBr/2,2 bipyridine as the catalyst/ligand at 110 ℃ was investigated. Both DMMDO and St components could be found in main chains of the obtained polymer, and the copolymer had a narrow molecular weight distribution. DMMDO component in the copolymer contained both addition and ring opening units, thus the ester bond was introduced into the main chain, and the copolymer could be chemically degradable and biologically degradable.展开更多
文摘A novel C60-styrene-maleic anhydride copolymer was prepared with radical polymerization. 50 mg of C60 and 1 g of styrene and 1 g of maleic anhydride were dissolved in 20 mL of o-dichlorobenzene, then was initiated by 200 mg of BPO at 70 ℃ under the protection of Ar for 32 h. The copolymer was obtained as a brown solid. The structure of copolymer was characterized by UV and FTIR. GPC analyses shows that its average molecular weight Mw is 13 000. The copolymer is soluble in THF, DMSO and water. The surface tension of 0.5% of copolymer aqueous solution was determined to be 54.6×10-3 N/m（20 ℃）. TEM analyses shows that the copolymer is a kind of water-soluble nanosphere with the average diameter of about 60 nm.
文摘This paper is the first report on the atom transfer radical copolymerization of unsaturated cyclic acetal, 4,7 dimethyl 2 methylene 1,3 dioxepane(DMMDO) and styrene(St) in the presence of α bromobutyrate as the initiator and CuBr/2,2 bipyridine as the catalyst/ligand at 110 ℃ was investigated. Both DMMDO and St components could be found in main chains of the obtained polymer, and the copolymer had a narrow molecular weight distribution. DMMDO component in the copolymer contained both addition and ring opening units, thus the ester bond was introduced into the main chain, and the copolymer could be chemically degradable and biologically degradable.
