Miscibility and Hydrogen Bonding Interactions in Blends of Poly(hydroxyether ketone) and Poly(4-vinyl pyridine)

Zhu, Liliang; Li, Lei; Yang, Xingtian; Yu, Ruan; Zheng, Sixun

doi:10.1080/00222348.2011.596802

Cited by 5 publications

(3 citation statements)

References 21 publications

(31 reference statements)

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“…Thermodynamically, the melting temperature depression implied intimately mixed components. [64][65][66] Solidification of the molten eutectic blend would result in finely intermixed solid structures. However, thermal annealing of blends below or above the eutectic concentration would result in crystals made of the excess component and surrounded by a fine matrix of both constituents.…”

Section: Resultsmentioning

confidence: 99%

High open circuit voltage organic solar cells based upon fullerene free bulk heterojunction active layers

et al. 2014

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We have recently reported on a small organic molecule containing a bithiophene core with end-capping phthalimide units (PthTh 2 Pth) that exhibited a H-aggregation tendency in the solid state and high electron mobility in organic field effect transistors. In this contribution, we have studied both the physical and electrical properties of poly(3-hexylthiophene) (P3HT) and PthTh 2 Pth thin films by measuring the optical absorption, Frontier molecular orbital energy levels, photoluminescence quenching, thermal properties, and photovoltaic response. Our results have provided a useful insight into the use of PthTh 2 Pth as an electron acceptor material for organic photovoltaic applications. In comparison with high-performance, fullerene-based, solution-processed bulk heterojunction solar cells reported in the literature, a relatively high open circuit voltage (ϳ0.94 V) was obtained for various donor-acceptor blend ratios. These results highlight the potential for PthTh 2 Pth to act as an alternative to fullerenes as acceptors in organic solar cell devices.Résumé : Nous avons récemment mis en évidence l'existence d'une petite molécule organique contenant du bithiophène en son coeur et des coiffes terminales phtalimide (PthTh 2 Pth). Cette molécule montrait une tendance à produire des agrégats d'hydrogène à l'état solide et présentait une mobilité électronique élevée dans des transistors organiques à effet de champ. Dans la présente étude, nous nous sommes intéressés aux propriétés physiques et électriques du poly(3-hexylthiophène) (P3HT) et de fines pellicules de PthTh 2 Pth en effectuant des mesures d'absorption optique, de niveaux d'énergie des orbitales moléculaires frontières, de désactivation de photoluminescence, des propriétés thermiques et de réponse photovoltaïque. Nos résultats ont fourni un aperçu utile de l'utilisation de PthTh 2 Pth comme matériau accepteur d'électrons dans les applications photovoltaïques organiques. En comparaison avec les cellules solaires à hétérojonction volumique traitées dans une solution à haute performance de fullerène décrites dans la littérature, un voltage en circuit ouvert relativement élevé (ϳ0,94 V) a été obtenu avec divers mélanges de proportions en donneurs et accepteurs différentes. Ces résultats mettent en évidence la capacité de PthTh 2 Pth à remplacer les fullerènes en agissant comme accepteurs dans les dispositifs équipés de cellules solaires. [Traduit par la Rédaction] Mots-clés : photovoltaïque organique, cellules solaires en plastique, hétérojonction volumique, traitement en solution, accepteurs non fullerèniques, petites molécules donneur-accepteur -conjuguées, agrégats d'hydrogène, voltage en circuit ouvert.

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Section: Resultsmentioning

confidence: 99%

High open circuit voltage organic solar cells based upon fullerene free bulk heterojunction active layers

et al. 2014

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“…Polymer blending, an economic way of elaborating new materials combining the properties of at least two different constituents, has been used for decades and still remains of great importance for both industrials and academic researchers …”

Section: Introductionmentioning

confidence: 99%

Phase Behavior and Thermal Analyses of Novel Blends Based on Poly(Styrene‐Co‐Itaconic Acid) and Poly(Ethylacrylate‐Co‐4‐Vinylpyridine)

Hambli

Djadoun

2016

Macromolecular Symposia

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Summary Aimed to be used in very specific applications, novel materials with properties different from those of their neat constituents, based on poly(styrene‐co‐itaconic acid) (PSIA‐x) and poly(ethylacrylate‐co‐4‐vinylpyridine) (PEA4VP‐y) of various compositions, prepared by free radical polymerization, were elaborated by simply mixing pairs of these copolymers in chloroform or THF used as a common solvent. The effective specific interactions that occurred between the two constituents of the blends, evidenced by FTIR spectroscopy, depended on the blend composition and controlled the morphology of the various elaborated materials. Their phase behavior and thermal properties, investigated by differential scanning calorimetry (DSC) and thermogravimetry analysis (TGA), confirmed enhanced thermal stability of most of these materials and differences in their mechanism of degradation. Moreover, the apparent activation energies of thermal degradation of a specific blend system estimated using Tang's method also confirmed a change in the thermal behavior of these materials with blend composition.

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“…Unfortunately, most pairs of polymers are immiscible. It is well established now that depending on the strength and densities of interacting species incorporated within two dissimilar polymers, miscible polymer blends or interpolymer complexes are formed as the number of effective specific interactions that occurred between the constituents of the polymer mixture increases. However due to several factors, not all the specific groups within the polymer chains get involved.…”

Section: Introductionmentioning

confidence: 99%

Thermal Stability of Interpolymer Complexes Based on Poly(styrene‐co‐4‐vinylpyridine) and Poly(styrene‐co‐itaconic Acid)

Amirouche

Lassoued

Djadoun

2014

Macromolecular Symposia

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Summary: Phase behaviour and specific interactions that occurred between poly (styrene-co-4-vinylpyridine) containing 20 mol % of 4-vinylpyridine (PS4VP20) and poly(styrene-co-itaconic acid) containing 17 mol % of itaconic acid (PSIA17) were investigated by differential scanning calorimetry (DSC) and Fourier Transform Infrared spectroscopy (FTIR).Due to favourable specific interactions among others, PSIA17/PS4VP20 system is miscible in the whole composition range, as evidenced by a single glass transition temperature (Tg), observed with each initial mixture, intermediate between those of the pure components. The Tg-composition dependence of this system fitted well the recent approach proposed by Brostow et al. (BCKV).Copolymerization of itaconic acid with styrene improved the thermal stability of PIA. The PSIA17/PS4VP20 blends showed a better thermal stability than their corresponding pure constituents. The degradation temperatures at maximum T dmax of these complexes are higher than those of pure constituents. Due to specific interactions that occurred between the two constituents of the blends, the anhydride amount observed with PSIA17 decreased.FTIR spectroscopy analysis confirmed qualitatively the occurrence of inter-polymer interactions from the appearance of new bands, characteristic of associated pyridine at 1607 cm À1 , pyridinium ion at 1638 cm À1 and liberated carbonyl groups of PSIA17 at 1725 cm À1. Quantitatively both fractions of liberated carbonyl and pyridinium species increased upon increasing PS4VP20 amount in the blend.

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Miscibility and Hydrogen Bonding Interactions in Blends of Poly(hydroxyether ketone) and Poly(4-vinyl pyridine)

Cited by 5 publications

References 21 publications

High open circuit voltage organic solar cells based upon fullerene free bulk heterojunction active layers

High open circuit voltage organic solar cells based upon fullerene free bulk heterojunction active layers

Phase Behavior and Thermal Analyses of Novel Blends Based on Poly(Styrene‐Co‐Itaconic Acid) and Poly(Ethylacrylate‐Co‐4‐Vinylpyridine)

Thermal Stability of Interpolymer Complexes Based on Poly(styrene‐co‐4‐vinylpyridine) and Poly(styrene‐co‐itaconic Acid)

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