The synthesis of new high molecular mass copolyformals containing long linear aliphatic linkages and different amounts of porphyrin units in the main chain is described. The copolymers have been prepared by the condensation reaction between a large excess of dibromomethane and mixtures of 1,12-dodecanedi(bisphenol A) ether (I) or 1,20-eicosanedi (bisphenol A)ether (II) and 5,10-bis(p-hydroxy-phenyl)-15,20-bis(p-dodecanoxyphenyl)porphyrin (III) in different molar ratio. The structural characteriza-tion of the resulting copolyethers has been performed by NMR and MALDI-TOF analysis. The average molecular mass values of the copolyethers determined by GPC have been compared with those obtained by a recently developed off-line procedure of MALDI-TOF mass spectrum processing. Thermal properties of copolymers have also been examined. All collected data show that high molecular mass copolymers with a homogeneous arrangement of the porphyrin and aliphatic units along the molecular chains and with a glass transition temperature depending on the aliphatic content in the molecules have been obtained.
Synthesis and Characterization of some Main Chain Porphyrin Copolyformals, Based on Bisphenol-A and Long Linear Aliphatic Units, Having a Low Glass Transition Temperature
MINEO, PLACIDO;
1999-01-01
Abstract
The synthesis of new high molecular mass copolyformals containing long linear aliphatic linkages and different amounts of porphyrin units in the main chain is described. The copolymers have been prepared by the condensation reaction between a large excess of dibromomethane and mixtures of 1,12-dodecanedi(bisphenol A) ether (I) or 1,20-eicosanedi (bisphenol A)ether (II) and 5,10-bis(p-hydroxy-phenyl)-15,20-bis(p-dodecanoxyphenyl)porphyrin (III) in different molar ratio. The structural characteriza-tion of the resulting copolyethers has been performed by NMR and MALDI-TOF analysis. The average molecular mass values of the copolyethers determined by GPC have been compared with those obtained by a recently developed off-line procedure of MALDI-TOF mass spectrum processing. Thermal properties of copolymers have also been examined. All collected data show that high molecular mass copolymers with a homogeneous arrangement of the porphyrin and aliphatic units along the molecular chains and with a glass transition temperature depending on the aliphatic content in the molecules have been obtained.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
