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- W1463676345 abstract "Copoly(-alkyl γ,DL-glutamate)s containing octadecyl and dodecyl side chains in a wide rangeof compositions (coPAAG-18,12) were synthesized from microbial racemic poly(γ,DL-glutamicacid) (PGGA). Feed ratios of 1-octadecanol to 1-dodecanol were 100:0, 75:25, 50:50, 25:75,and 0:100. The procedure of synthesis consisted of two-steps: Poly(-ethyl γ,DL-glutamate)(PAAG-2) was prepared by esterification of PGGA and then transesterified with 1-octadecanolor/and 1-dodecanol to obtain the corresponding copolymers coPAAG-18,12 (x:y).The polyglutamates and copolyclutamates synthesized in this work were characterized byNuclear Magnetic Resonance (1H-NMR), Fourier Transform Infrared (FTIR), Gel PermeationChromatography (GPC) and Intrinsic Viscosity (IV). Their thermal properties were evaluated byThermogravimetry (TGA) and Differential Scanning Calorimetry (DSC).These copolymers display the following features: a) First melting temperature (Tm1) ( 50 oC)according to antecedents; b) Second melting temperature (Tm2) (~100 oC) striking and withoutexplanation; c) No melting temperature (Tm) in the case of PAAG-12; d) A Tm value incopolyesters going down with the content in dodecanol units." @default.
- W1463676345 created "2016-06-24" @default.
- W1463676345 creator A5014562552 @default.
- W1463676345 date "2012-02-01" @default.
- W1463676345 modified "2023-09-23" @default.
- W1463676345 title "Copoly(γ,DL-glutamate)s containing octadecyl and dodecyl side chains: Synthesis and characterization" @default.
- W1463676345 hasPublicationYear "2012" @default.
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