화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.29, No.9, 613-624, September, 2021
DOI10.1007/s13233-021-9069-5  Export Citation
Synthesis, Characterization of Erythromycin Propionate Core-Based Star Poly(ether urethane)s and Their Antibacterial Properties
Daniela Filip†, Doina Macocinschi, Cristina Gabriela Tuchilus1, Mirela Fernanda Zaltariov, and Cristian Dragos Varganici
  • “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, 700487, Iasi, Romania
  • 1“Gr. T. Popa”University of Medicine and Pharmacy, Faculty of Medicine, Microbiology Department, 16 Universitatii Street, 700115, Iasi, Romania
E-mail:
New four-arm star poly(ether urethanes) (star PUs) based on erythromycin propionate core are presented. Toluene 2,4-diisocyanate (TDI) and 4,4’-methylenebis (phenyl isocyanate) (MDI) as diisocyanates and Terathane of different molecular weights as polyether arms were employed in their synthesis in order to study their structure-property relationship. The synthesized star PUs were analyzed through IR and 1H NMR spectroscopies, gel permeation chromatography, X-ray diffraction, thermogravimetry, differential scanning calorimetry. The IR spectral changes obtained on heating the samples were investigated. Disc-diffusion method was employed for antimicrobial tests. The values of the glass transition temperature are higher than those of starting polyethers attributable to the influence of the more rigid erythromycin propionate core bearing urethane groups. The melting temperatures corresponding to soft polyether arms are in the melting temperature range of starting polyethers. At higher temperatures melting phenomena associated to hard urethane core are obtained. The IR spectra recorded at various temperatures reveal that the composition of the hard segment having MDI in the structure ensures higher conformation stability during heating process. The crystalline peaks in the X-ray diffractograms are consequence of polyether arms crystallinity. MDI and higher polyether molecular weight increase the thermal stability. The values of hydrodynamic radii increase with increasing polyether arm length and are higher for TDI star PUs than MDI star PU because of the expanded structures of the former ones. The antibacterial study reveals that for hospital S. aureus strain the diameters of inhibition zones are lower than for S. aureus ATCC 25923.
Keywords:star polyurethanes;erythromicin propionate;thermal analyses;antibacterial;Staphylococcus aureus
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