Polyesteramides containing polydimethylsiloxane blocks are successfully synthesized in bulk at 70 C via a biocatalytic route starting from diethyladipate, 1,8-octanediol and ,-diaminopropyl-polydimethylsiloxane as monomers. The amide/ester ratio of the copolymers with different composition is calculated by means of 1H NMR spectroscopy, and it is in agreement with the molar feed ratio of monomers. The relative amount of amide and ester units along the polymer chain strongly affects the physical aspect of the polyesteramides that change from hard solids, when rich in crystallizable ester units, to soft sticky materials when the silicon-based amide unit is the major component. The copolymers are characterized by TGA, DSC and WAXS analyses.
E. Zini, M.L. Focarete, M. Scandola, B. Sharma, A. Azim, H. Azim, et al. (2007). POLIESTERAMIDI ALIFATICHE CONTENENTI BLOCCHI DI POLIDIMETILSILOSSANO SINTETIZZATE PER VIA ENZIMATICA. PISA : Pacini Editore SpA.
POLIESTERAMIDI ALIFATICHE CONTENENTI BLOCCHI DI POLIDIMETILSILOSSANO SINTETIZZATE PER VIA ENZIMATICA
ZINI, ELISA;FOCARETE, MARIA LETIZIA;SCANDOLA, MARIASTELLA;
2007
Abstract
Polyesteramides containing polydimethylsiloxane blocks are successfully synthesized in bulk at 70 C via a biocatalytic route starting from diethyladipate, 1,8-octanediol and ,-diaminopropyl-polydimethylsiloxane as monomers. The amide/ester ratio of the copolymers with different composition is calculated by means of 1H NMR spectroscopy, and it is in agreement with the molar feed ratio of monomers. The relative amount of amide and ester units along the polymer chain strongly affects the physical aspect of the polyesteramides that change from hard solids, when rich in crystallizable ester units, to soft sticky materials when the silicon-based amide unit is the major component. The copolymers are characterized by TGA, DSC and WAXS analyses.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
