Poly FTIR spectroscopy

Jabbari, E., Wisniewski, N., and Peppas, N.A., Evidence of mucoadhesion by chain interpenetration at a poly(acrylic acid)/mucin interface using ATR-FTIR spectroscopy, J. Control. Rel., 26 99-108 (1993). 

We reported the synthesis of Si/Si02//PS-h-poly(acrylate) tethered diblock copolymer brushes [31,32,46,47]. The properties of these diblock brushes were studied using water contact angles, ellipsometry. X-ray photoelectron spectroscopy (XPS), FTIR spectroscopy and atomic force microscopy (AFM). For a sample with a 26 nm PS layer and a 9 nm PMMA layer, the advanc-... 

Garret, J. T., X. Ruijian, J. Cho, and R. James. "Phase Separation of Diamine Chain Extended Poly(Urethane) Copolymers FTIR Spectroscopy and Phase Transions." Polymer 44 (2003) 2711-2719. 

The effects of alkyl spacer length between both charged moieties with different substitution at, and with different hybridization of, the quat-ernized nitrogen were studied for a series of poly(carboxybetaines) derived from poly(4-vinylpyridine) and poly(vinylbenzyl chloride) by capillary electrophoresis, charge titration, and FTIR spectroscopy. A strong pH-and structure-dependent shift in electrophoretic mobihties is revealed for... 

Polymea mictocapsules containing 0,0-3,5,6-trichloro-2-pyridyl phosphorothioate (Dursban) were prepared by reacting a polyisocyanate and a poly amine and the factors affecting the formation of the microcapsule wall examined. The formation of polyurea was confirmed by FTIR spectroscopy, the thermal properties of the microcapsules were investigated by DSC and the morphology of the microcapsules detenninedby scanning electron microscopy. Optimum conditions for the formation of a thin surface l er and a porous matrix were established. 9 lefs. 

Triblock and random polyampholytes based on DMAEM-MMA-MAA were examined for their phase separation behaviour [52]. Triblock polyampholytes have a much broader phase separation region than the random ones. The specific structure of PMAA-fc-PlM4VPCl with the excess of cationic or anionic blocks at the lEP is close to the structure of non-stoichiometric IPC. It is suggested that its nucleus consists of intraionic IPC surrounded by cationic blocks protecting it from precipitation [53]. ABC triblock copolymers of polystyrene-b/ock-poly(2-(or 4)vinylpyridine)-fc/ock-poly(methacrylic acid) were synthesized by living anionic polymerization [53 a]. Interpolymer complexation of the polyvinylpyri-dine and poly(methacrylic acid) blocks in the micellar solution was studied in relation to pH in solution by potentiometric, conductimetric and turbidimetric titration and in bulk by FTIR spectroscopy. 

Maeda Y, Nakamura T, Ikeda I (2001) Changes in the hydration states of poly (N-alkylacrylamide) s during their phase transitions in water observed by FTIR spectroscopy. Macromolecules 34 1391... 

Analysis of the temperature dependence of surface chemical reactions will provide a more detailed insight into the underlying factors that may hamper the corresponding surface reactions. Using the CA approaches introduced above, the surface compositions of SAMs of NHS-CIO and thin films of poly(N-hydroxysuccinimidyl methacrylate) (PNHSMA) on oxidized silicon (Fig. 11) were determined after reaction in alkaline media at different temperatures [128]. FTIR spectroscopy provides complementary information, but owing to their limited surface sensitivity, spectroscopic methods are inferior to CA measurements [148]. 

The simplest self-complementary motif involves two-point donor-acceptor (DA) H-bonding interactions that form cyclic dimers. Carboxylic acids, for example, are ubiquitous and have been investigated for decades. Fourier transform infrared (FTIR) spectroscopy of poly(acrylic acid)s and ethylene-methacrylic acid copolymers show that dimers persist well above the glass transition temperature (Tg) of the materials [12, 13]. Furthermore, carboxylic acids can interact within polymer melts. Instead of forming dimers, they organize into clusters, providing the basis for a supramolecular network. Lillya and colleagues showed that telechelic... 

The synthesis of a 5000 g/mol poly( 1,3-cyclohexadiene) homopolymer (Figure 6) was monitored using in situ FTIR spectroscopy. The resulting polymer was characterized using SEC and found to be a single peak with a molecular weight of 5,200 g/mol and a molecular weight distribution of 1.01. In situ near-FTIR spectroscopy has been previously employed for... 

The nature of the complexes formed by the interactions between polyacrylic acid (PAA) and polymethacrylic acid (PMAA) with poly(4-vinylpyridine) and poly(2-vinylpyridine) in ethanol/water solution was studied using FTIR spectroscopy. The PMAA complexes involved hydrogen-bonding interactions, while there was evidence of ionic interactions in the PAA complexes. This difference in the behaviour between the complexes is attributed to the higher acidity of PAA compared with that of PMAA (140). 

The condensation grafting of polyethylenimine (PEI) onto poly(acrylamide-co-acryhc acid) (PAM-co-AA) was studied by FTIR spectroscopy. The reaction mechanism, which proceeded by a two-step reaction, involved the conversion of AA to acid chloride (AC) using thionyl chloride, followed by the condensation of AC onto PAM and with amine onto PEI to form the graft copolymer (125). 

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