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Wyszukujesz frazę "Gadomska-Gajadhur, Agnieszka" wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
Optimizing the conditions of PGSu synthesiswith simplex method
Autorzy:
Wrzecionek, Michał
Howis, Joanna
Ruśkowski, Paweł
Gadomska-Gajadhur, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/185166.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
poly(glycerol succinate)
polycondensation
glycerol polyesters
biomaterials
optimization
poli (bursztynian glicerolu)
polikondensacja
poliestry glicerolu
biomateriały
optymalizacja
Opis:
Poly(glycerol succinate) – PGSu – is one of glycerol polyesters which has focused nowadays the interestof scientists developing new biomaterials. Probably the polyester could be used as a drug carrier or asa cell scaffold in tissue engineering. Due to its potential use in medicine, it is extremely important todevelop a synthesis and then optimize it to obtain a material with desired properties. In this work oneflask two-step polycondensation of glycerol and succinic anhydride to PGSu is presented. Synthesiswas optimized with the simplex method and also described using a second-degree equation with twovariables (temperature and time) to better find the optimum conditions. PGSu was characterized byFTIR spectroscopy, NMR spectroscopy, degree of esterification was determined, and also molecularweight was calculated for each experiment using Carothers equation. A new synthesis route wasdeveloped and optimized. Temperature and time influence on molecular weight and esterificationdegree of obtained polyester are presented. Based on experiments conducted in this work, it waspossible to obtain poly(glycerol succinate) with molecular weight of 6.7 kDa.
Źródło:
Chemical and Process Engineering; 2020, 41, 2; 119--128
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The catalyst-free polytransesterification for obtaining linear PGS optimized with use of 22 factorial design
Autorzy:
Wrzecionek, Michał
Howis, Joanna
Marek, Paulina H.
Ruśkowski, Paweł
Gadomska-Gajadhur, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/2034050.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
poly(glycerol sebacate)
polycondensation
optimization
poli(sebacynian glicerolu)
polikondensacja
optymalizacja
Opis:
Poly(glycerol sebacate) (PGS) is a polyester that is particularly useful for tissue engineering appli- cations. Many researchers have focused on the application and characterization of materials made from PGS. Synthesis is often superficially described, and the prepolymer is not characterized before crosslinking. Considering the different functionality of each monomer (glycerine – 3, sebacic acid – 2), materials with a branched structure can be obtained before the crosslinking process. Branched struc- tures are not desirable for elastomers. In this work, method to obtain linear PGS resins is presented. Moreover, synthesis was optimized with the use of the Design of Experiments method for minimizing the degree of branching and maximizing the molecular weight. The process was described via mathe- matical models, which allows to the association of process parameters with product properties. In this work ca. 1kDa and less than 10% branched PGS resin was produced. This resin could be used to make very flexible elastomers because branching is minimized.
Źródło:
Chemical and Process Engineering; 2021, 42, 1; 43-52
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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