Linear low-density polyethylene (LLDPE) was prepared by in situ polymerization using a dual-functional catalytic system containing Et(Ind)2ZrCl2/MAO and Ti(On-Bu)4 /AlEt3 used as co-polymerization catalyst and dimeriz...Linear low-density polyethylene (LLDPE) was prepared by in situ polymerization using a dual-functional catalytic system containing Et(Ind)2ZrCl2/MAO and Ti(On-Bu)4 /AlEt3 used as co-polymerization catalyst and dimeriza-tion catalyst, respectively. The catalytic system showed high activity and the polymer with low melting point, narrow molecular weight distribution (MWD) and low crystallinity was produced.展开更多
A series of monomers of 5,15-dithienyl porphyrin, 5,15-di-bithienyl porpyrin and their metal complexes were synthesized in high yields. 5,15-Di-bithienyl porphyrin and its metal complexes were polymerized by chemical...A series of monomers of 5,15-dithienyl porphyrin, 5,15-di-bithienyl porpyrin and their metal complexes were synthesized in high yields. 5,15-Di-bithienyl porphyrin and its metal complexes were polymerized by chemical oxidation using FeCl3 as oxidant (>90%) for making organic conductor and the linear porphyrin-thiophene co- polymers were obtained. The structures of the copolymers were identified by elemental analysis and IR spectra. The conductivity of poly 5,15-di-bithienyl porphyrin was measured to reach over 10-6 S/cm. 5,15-Dithienyl porphyrins and its metal complexes could not be polymerized under the similar conditions, but could be polymerized by elec- trochemical oxidation on the gold-plate electrode.展开更多
基金This work was supported by the National Natural Science Foundation of China and China Petrochemical Corporation (Grant No. 29734141).
文摘Linear low-density polyethylene (LLDPE) was prepared by in situ polymerization using a dual-functional catalytic system containing Et(Ind)2ZrCl2/MAO and Ti(On-Bu)4 /AlEt3 used as co-polymerization catalyst and dimeriza-tion catalyst, respectively. The catalytic system showed high activity and the polymer with low melting point, narrow molecular weight distribution (MWD) and low crystallinity was produced.
基金Project supported by the National Natural Science Foundation of China (Nos. 29872033 20272046).
文摘A series of monomers of 5,15-dithienyl porphyrin, 5,15-di-bithienyl porpyrin and their metal complexes were synthesized in high yields. 5,15-Di-bithienyl porphyrin and its metal complexes were polymerized by chemical oxidation using FeCl3 as oxidant (>90%) for making organic conductor and the linear porphyrin-thiophene co- polymers were obtained. The structures of the copolymers were identified by elemental analysis and IR spectra. The conductivity of poly 5,15-di-bithienyl porphyrin was measured to reach over 10-6 S/cm. 5,15-Dithienyl porphyrins and its metal complexes could not be polymerized under the similar conditions, but could be polymerized by elec- trochemical oxidation on the gold-plate electrode.
