Miscibility and immiscibility in functionalized associating polymer systems: polystyrene-poly(phenylene oxide) blends

Hseih, D. T.; Peiffer, Dennis G.

doi:10.1016/0032-3861(92)90765-o

Cited by 35 publications

(17 citation statements)

References 25 publications

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“…Besides, it could be expected that the incorporation of ionic groups in their chains would provide electrostatic cross-linking. In the case of an ionomer blend of sulfonated polystyrene and sulfonated PPO, Jung et al [41] and Hseih et al [51] have pointed out the attractive forces between sulfonated segments and the repulsive force between unmodified and sulfonated segments.…”

Section: Resultsmentioning

confidence: 99%

Characterization of nanohybrid membranes for direct methanol fuel cell applications

et al. 2009

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Section: Resultsmentioning

confidence: 99%

Characterization of nanohybrid membranes for direct methanol fuel cell applications

et al. 2009

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“…It has been established that the observation of a single glass temperature transition (T g ) between those of the pure constituents is evidence of their miscibility, whereas the detection of two T g s corresponding to the pure constituents, respectively, indicating their immiscibility. 17,18 Systems that are initially immiscible can be transformed to miscible without the presence of any specific interaction when intramolecular repulsions between the comonomers are sufficient. In this way, we examine the effects of the introduction of styrene comonomer into homopolymer poly(4-vinylpyridine) of an immiscible blends namely PS/P4VP.…”

Section: Dsc Studymentioning

confidence: 99%

“…To quantify the intensity of specific interactions within various PSMA20/PS4VP systems, we applied the Kwei equation developed essentially to describe the T g of the blends where strong intermolecular interactions are involved, particularly when there is a strong deviation from the additivity rule 17 :…”

Section: Dsc Studymentioning

confidence: 99%

The phase behavior and thermal stability of blends of poly(styrene‐co‐methacrylic acid)/poly(styrene‐co‐ 4‐vinylpyridine)

Benabdelghani

Etxeberria

2011

J of Applied Polymer Sci

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ABSTRACT:The hydrogen bonding and miscibility behaviors of poly(styrene-co-methacrylic acid) (PSMA20) containing 20% of methacrylic acid with copolymers of poly(styrene-co-4-vinylpyridine) (PS4VP) containing 5, 15, 30, 40, and 50%, respectively, of 4-vinylpyridine were investigated by differential scanning calorimetry, thermogravimetric analysis (TGA), and Fourier transform infrared spectroscopy (FTIR). It was shown that all the blends have a single glass transition over the entire composition range. The obtained T g s of PSMA20/PS4VP blends containing an excess amount of PS4VP, above 15% of 4VP in the copolymer, were found to be significantly higher than those observed for each individual component of the mixture, indicating that these blends are able to form interpolymer complexes. The FTIR study reveals presence of intermolecular hydrogen-bonding interaction between vinylpyridine nitrogen atom and the hydroxyl of MMA group and intensifies when the amount of 4VP is increased in PS4VP copolymers. A new band characterizing these interactions at 1724 cm À1 was observed. In addition, the quantitative FTIR study carried out for PSMA20/PS4VP blends was also performed for the methacrylic acid and 4-vinylpyridine functional groups. The TGA study confirmed that the thermal stability of these blends was clearly improved.

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“…Regarding a similar ionomer blend of SPS/SPPO, Hseih et al pointed out that there are two forces governing miscibility, that is, the attractive force between sulfonated segments and the repulsive force between unmodified and sulfonated segments. [17] As can be seen in Figure 2(a), the DSC thermograms of the SPS/SPPO blend exhibit only single glass transition temperatures for different compositions. Weiss et al predicted the variation of the glass transition temperature for a miscible blend as a function of composition with a measure of the intermolecular interactions, such as the FloryHuggins interaction parameter (w).…”

Section: Experimental Partmentioning

confidence: 91%

Partially Sulfonated Polystyrene and Poly(2,6‐dimethyl‐1,4‐phenylene oxide) Blend Membranes for Fuel Cells

Jung

2004

Macromol. Rapid Commun.

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Summary: Based on Flory–Huggins parameters (χ), the miscibility and the effect of morphological change on proton conductivity and methanol permeability of partially sulfonated polystyrene (SPS) and partially sulfonated poly(2,6‐dimethyl‐1,4‐phenylene oxide) (SPPO), having an identical ion exchange capacity, were investigated. When 50 wt.‐% of SPPO was blended, both the proton conductivity and methanol permeability had the highest values, which resulted from the change of amorphous domains and the hydrogen bonding between the two ionomers.The proton conductivities, water uptake and methanol permeability for the SPPO/SPS blend membranes studied here. The membranes with 50 wt.‐% SPPO clearly showed the greatest increase in these properties.imageThe proton conductivities, water uptake and methanol permeability for the SPPO/SPS blend membranes studied here. The membranes with 50 wt.‐% SPPO clearly showed the greatest increase in these properties.

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Miscibility and immiscibility in functionalized associating polymer systems: polystyrene-poly(phenylene oxide) blends

Cited by 35 publications

References 25 publications

Characterization of nanohybrid membranes for direct methanol fuel cell applications

Characterization of nanohybrid membranes for direct methanol fuel cell applications

The phase behavior and thermal stability of blends of poly(styrene‐co‐methacrylic acid)/poly(styrene‐co‐ 4‐vinylpyridine)

Partially Sulfonated Polystyrene and Poly(2,6‐dimethyl‐1,4‐phenylene oxide) Blend Membranes for Fuel Cells

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