Synthesis, characterization and thermoreversible behaviours of poly(dimethyl siloxane)/poly(N-isopropyl acrylamide) semi-interpenetrating networks

Erbi̇l, Candan; Kazancıoğlu, Emine; Uyanık, Nurseli

doi:10.1016/j.eurpolymj.2003.12.024

Cited by 70 publications

(47 citation statements)

References 22 publications

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“…The peak at 1545 cm -1 for NIPAAm and SBS-g-NIPAAm copolymer was assigned as a symmetric deformation of NH 3 + . These results correspond to the finding of Erbil et al, (2004) and Ju et al,(2002). However, the peaks present at 1617 cm -1 (C=C) and 1407 cm -1 (CH2=) in the NIPAAm spectrum disappeared for SBS-g-NIPAAm copolymer as illustrated in Figure 11 (b).…”

Section: Spectral Analysis Of the Grafted Sbs Copolymerssupporting

confidence: 93%

Synthesis and Characterisation of Styrene Butadiene Styrene Based Grafted Copolymers for Use in Potential Biomedical Applications

Kennedy¹,

Higginbotham²

2011

Biomedical Engineering, Trends in Materials Science

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Section: Spectral Analysis Of the Grafted Sbs Copolymerssupporting

confidence: 93%

Synthesis and Characterisation of Styrene Butadiene Styrene Based Grafted Copolymers for Use in Potential Biomedical Applications

Kennedy¹,

Higginbotham²

2011

Biomedical Engineering, Trends in Materials Science

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“…Figure 5 displays the equivalent circuit (EC) which was found to satisfactorily fit the EIS diagrams shown in Figure 4, corresponding to R 1 .(CPE. [R b .W]), where: R 1 represents the polymer/electrode interfacial resistance [19,20] , R b represents the bulk resistance, and CPE is the impedance related to a constant phase element. The capacitance was replaced by a CPE copolymers, which increased with the degree of sulfonation, may be responsible for this early weight loss, i.e.…”

Section: Resultsmentioning

confidence: 99%

“…Nevertheless, these conductivity values were much lower than that found for the pure sulfonated resin. [19] , where CPE represents an ideal capacitor for n = 1.0 and a resistor for n = 0.0. The Warburg impedance, W, which is in serial connection with R b , takes into account the diffusion process.…”

Section: Discussionmentioning

confidence: 99%

Sulfonation and characterization of styrene-indene copolymers for the development of proton conducting polymer membranes

et al. 2012

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Abstract:The aim of this work is to obtain polymer precursors based on styrene copolymers with distinct degrees of sulfonation, as an alternative material for fuel cell membranes. Acetyl sulfate was used to carry out the sulfonation and the performance of the polyelectrolyte was evaluated based on the content of acid polar groups incorporated into the macromolecular chain. Polymeric films were produced by blending the sulfonated styrene-indene copolymer with poly(vinylidene fluoride). The degree of sulfonation of the polymer was strongly affected by the sulfonation reaction parameters, with a direct impact on the ionic exchange capacity and the ionic conductivity of the sulfonated polymers and the membranes obtained from them. The films produced with the blends showed more suitable mechanical properties, although the conductivity of the membranes was still lower than that of commercially available membranes used in fuel cells.

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“…Reports on the preparation of IPNs based on hydrophobic polydimethylsiloxane (PDMS) and another hydrophilic polymer are frequent. 2,4,[12][13][14] Synthesizing an IPN of incompatible polymers offers an advantage in comparison with forming a polymer blend because the degree of phase separation is lower in an IPN.…”

Section: Introductionmentioning

confidence: 99%

Transparency and wettability of PVP/PDMS‐IPN synthesized in different organic solvents

Hillerström

Andersson²,

Pedersen

et al. 2009

J of Applied Polymer Sci

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An interpenetrating polymer network (IPN) combining a hydrophobic polymer (polydimethylsiloxane, PDMS) and a hydrophilic polymer (polyvinylpyrrolidone, PVP) was synthesized in different solvents via a two-step preparation method. The solvent used during polymerization of the IPN showed a significant impact on the properties of the PVP/PDMS-IPN. The choice of solvent was affecting both the wettability and transparency of the PVP/ PDMS-IPN. The PVP/PDMS-IPNs turned hydrophilic in all the solvents used in this study, but the transition from a hydrophobic to a hydrophilic PVP/PDMS-IPN occurred at lower PVP concentration if a solvent with similar solubility parameter as PVP was chosen. Also, the PVP/PDMS-IPNs were transparent when the samples were polymerized in a good solvent for PVP. It was concluded that the properties of the PVP/PDMS-IPN can be tuned by the selection of the solvent used during polymerization. The size of the PVP phase domains in the PVP/PDMS-IPNs were analyzed with X-ray scattering techniques (SAXS), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and differential scanning calorimetry (DSC), and the sizes of the domains were found to be smaller than 350 nm.

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Synthesis, characterization and thermoreversible behaviours of poly(dimethyl siloxane)/poly(N-isopropyl acrylamide) semi-interpenetrating networks

Cited by 70 publications

References 22 publications

Synthesis and Characterisation of Styrene Butadiene Styrene Based Grafted Copolymers for Use in Potential Biomedical Applications

Synthesis and Characterisation of Styrene Butadiene Styrene Based Grafted Copolymers for Use in Potential Biomedical Applications

Sulfonation and characterization of styrene-indene copolymers for the development of proton conducting polymer membranes

Transparency and wettability of PVP/PDMS‐IPN synthesized in different organic solvents

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