New Approach to Quantitative Analysis of Two-Component Polymer Systems by Infrared Spectroscopy

Cole, Kevin P.; Thomas, Yannig; Pellerin, E.; Dumoulin, M. M.; Paroli, Ralph M.

doi:10.1366/0003702963905646

Cited by 26 publications

(9 citation statements)

References 10 publications

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“…From the molecular weight curve profiles, it is possible to conclude that changes in the comonomer type enable the production of different Ind polymers. Table 2 shows the St and Lim content of some Indcopolymer samples that were determined by FTIR quantitative analysis [36,37] and their T g values as a function of comonomer concentration in the feed. The comonomer content in the copolymers was evaluated using the absorption peaks at 1479 and 1493 cm À1 for Ind and St, respectively, in the poly(Ind-co-St) spectrum, and the absorption peaks at 3066 and 881 cm À1 for Ind and Lim, respectively, in the poly(Ind-co-Lim) spectrum.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of hydrocarbon polymers by cationic polymerization and their thermal properties

Brum

Laux

Forte

2012

Designed Monomers and Polymers

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Cationic homo-and co-polymerization of indene (Ind), styrene (St), limonene (Lim), and 5-ethylidene-2-norbornene (ENB) was performed with AlCl 3 in dichloroethane at À20°C under inert N 2 . The aim of this work is to investigate the effect of the reaction conditions on the molecular weight of polyindene (PInd) obtained by cationic polymerization with AlCl 3 without an electron donor, and also to determine the effect of the use of cyclic diolefin comonomers on the polymer properties. The polymers were synthesized at a monomer/catalyst molar ratio (MR) of 100; St and Lim showed the highest and lowest reactivity, respectively. The polymers were characterized by 13 C and 1 H NMR spectroscopy, Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy, size exclusion chromatography, differential scanning calorimetry, and thermogravimetric analysis. PInd with a number average molecular weight (M n ) of 45 Â 10 3 g/mol and a glass transition temperature (T g ) of 207°C was obtained, whereas only oligomeric polylimonenes were obtained. Cyclic diolefins depressed both the M n and T g values of the Ind-copolymers. There was a dramatic decrease in the M n of the polymers: those obtained at a MR of 1:1 in the feed presented M n values lower than 10 4 g/mol, with the exception of poly(Ind-co-ENB), which is cross-linked. Poly(Ind-co-Lim) with lateral double bonds, a comonomer content of 1 to 20 mol%, and T g values in the range of 140-200°C were obtained.

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Section: Resultsmentioning

confidence: 99%

Synthesis of hydrocarbon polymers by cationic polymerization and their thermal properties

Brum

Laux

Forte

2012

Designed Monomers and Polymers

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“…The content of ChMA in the PMAG- b -PChMA was established by FTIR spectroscopy using a calibration plot built for a mixture of PMAG and PChMA homopolymers ( Figure S2, Supplementary Materials ). This approach was earlier reported in several papers for the determination of the composition for block-copolymers [ 51 , 52 ]. The ratio of the intensities of the absorption bands specific to PMAG and PChMA was used to determine the molar fraction of the hydrophobic block (PChMA) in PMAG- b -PChMA.…”

Section: Resultsmentioning

confidence: 97%

Self-Assembled Nanoparticles Based on Block-Copolymers of Poly(2-Deoxy-2-methacrylamido-d-glucose)/Poly(N-Vinyl Succinamic Acid) with Poly(O-Cholesteryl Methacrylate) for Delivery of Hydrophobic Drugs

Levit

Vdovchenko

Dzhuzha

et al. 2021

IJMS

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The self-assembly of amphiphilic block-copolymers is a convenient way to obtain soft nanomaterials of different morphology and scale. In turn, the use of a biomimetic approach makes it possible to synthesize polymers with fragments similar to natural macromolecules but more resistant to biodegradation. In this study, we synthesized the novel bio-inspired amphiphilic block-copolymers consisting of poly(N-methacrylamido-d-glucose) or poly(N-vinyl succinamic acid) as a hydrophilic fragment and poly(O-cholesteryl methacrylate) as a hydrophobic fragment. Block-copolymers were synthesized by radical addition–fragmentation chain-transfer (RAFT) polymerization using dithiobenzoate or trithiocarbonate chain-transfer agent depending on the first monomer, further forming the hydrophilic block. Both homopolymers and copolymers were characterized by 1H NMR and Fourier transform infrared spectroscopy, as well as thermogravimetric analysis. The obtained copolymers had low dispersity (1.05–1.37) and molecular weights in the range of ~13,000–32,000. The amphiphilic copolymers demonstrated enhanced thermal stability in comparison with hydrophilic precursors. According to dynamic light scattering and nanoparticle tracking analysis, the obtained amphiphilic copolymers were able to self-assemble in aqueous media into nanoparticles with a hydrodynamic diameter of approximately 200 nm. An investigation of nanoparticles by transmission electron microscopy revealed their spherical shape. The obtained nanoparticles did not demonstrate cytotoxicity against human embryonic kidney (HEK293) and bronchial epithelial (BEAS-2B) cells, and they were characterized by a low uptake by macrophages in vitro. Paclitaxel loaded into the developed polymer nanoparticles retained biological activity against lung adenocarcinoma epithelial cells (A549).

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“…An aperture of 25 Â 400 mm 2 was set, and moved along film thickness direction by 50 mm. vIn order to quantify the TDP contents, the following equation which derived from Beer-Lambert Law was used; [15] A…”

Section: Fourier Transform Infrared (Ft-ir) Mapping Measurementmentioning

confidence: 99%

Fabrication of Compositional‐Gradient Biodegradable Polymeric Films Showing Self‐Bending Deformation

Yamazaki

Dong

Asakawa

et al. 2009

Macromol. Rapid Commun.

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A compositional graded film of poly(ε-caprolactone) (PCL) with 4,4'-thiodiphenol (TDP), in the film thickness direction, was fabricated by self-diffusing of TDP in the PCL melt. We found out the self-bending deformation of the gradient film, which bent into a rolled-up shape by itself. The initial shape of the film was flat when the sample was quenched from the melt. Upon the fast crystallization of PCL, the gradient film bent to the side with low TDP content. Then, after PCL crystallized the film bent to the opposite direction, that is, to the side with high TDP content. This bending to the TDP rich region was induced by not only the crystallization of PCL but also mass transfer due to the diffusion of TDP from TDP rich region to poor region.

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New Approach to Quantitative Analysis of Two-Component Polymer Systems by Infrared Spectroscopy

Cited by 26 publications

References 10 publications

Synthesis of hydrocarbon polymers by cationic polymerization and their thermal properties

Synthesis of hydrocarbon polymers by cationic polymerization and their thermal properties

Self-Assembled Nanoparticles Based on Block-Copolymers of Poly(2-Deoxy-2-methacrylamido-d-glucose)/Poly(N-Vinyl Succinamic Acid) with Poly(O-Cholesteryl Methacrylate) for Delivery of Hydrophobic Drugs

Fabrication of Compositional‐Gradient Biodegradable Polymeric Films Showing Self‐Bending Deformation

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