NDLI: Quaternized / betainized ) amino-based amphiphilic block copolymers : quantitative composition characterization via FTIR and thermogravimetry

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Quaternized / betainized ) amino-based amphiphilic block copolymers : quantitative composition characterization via FTIR and thermogravimetry

Content Provider	Semantic Scholar
Author	Bomfim, João A. S. Mincheva, Rosica Beigbeder, Alexandre Persenaire, Olivier Dubois, Philippe Francois
Copyright Year	2009
Abstract	The objective of the present study is the introduction of well known and readily accessible analytical methods as FTIR, thermogravimetric (TGA) and evolved gas analysis (EGA) for quantitative determination of the degree of polymerization (DP) and degree of quaternization (DQ)/betainization (DB) of amino-based amphiphilic block copolymers. For this purpose a series of amphiphilic poly(dimethylsiloxane)-b-poly[2-{dimethylamino)ethyl methacrylate] (PDMS-b-DMAEMA) diblock copolymers with DP of the PDMAEMA-block ranging from 22 to 162 was synthesized by atom transfer radical polymerization and analyzed by 1 H NMR, ATR-FTIR and TGA-co-EGA. The determined composition results have shown linear correlation between the FTIR or TGA and the 1 H NMR data and equations allowing the quantitative calculation of PDMAEMA-block DP were found. The errors estimated by ATR-FTIR were less than 1.5%. Further, the PDMAEMA-block was quaternized (or betainized) with DQ (or DB) from 25 % to 100 % and analyzed by TGA-co-EGA. Again, a linear correlation between the quaternized (betainized) PDMAEMA-block mass fraction and the DQ (DB) degrees was obtained by 1 H NMR.
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://docnum.umons.ac.be/Access/WebOpenAccess/GetDocument.aspx?Filename=350+Dubois+et+al+e-Polymers+2009+035+1_17.pdf&GuidTicket=a80a3c7d-9086-4812-a217-ed513034045b
Language	English
Access Restriction	Open
Subject Keyword	2-hydroxyethyl methacrylate ANTXR1 wt Allele ATR protein, human Amino Acid Modification, Co-Translational Answer to reset Automatic target recognition Data quality Enhanced Graphics Adapter Gases Mass fraction Methacrylates PDMS Spectroscopy, Fourier Transform Infrared TBX1 wt Allele Thermogravimetry Truevision TGA poly(2-(dimethylamino)ethyl methacrylate)
Content Type	Text
Resource Type	Article

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