Synthesis of poly(<i>m</i>‐phenyleneisophthalamide) by solid‐state polycondensation of isophthalic acid with <i>m</i>‐phenylenediamine

Zhang, Cenyao; Shoji, Yu; Higashihara, Tomoya; Tsukuda, Akimitsu; Ochi, Takashi; Ueda, Mitsuru

doi:10.1002/pola.24934

Cited by 17 publications

(17 citation statements)

References 11 publications

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“…Advincula et al [ 78 ] chemically connected carbazole with thiophene dendrons. In contrast to the materials synthesized by Zhu et al [ 79 ] the carbazoles were attached by nonconjugated alkyl chains. Advincula et al mention energy transfer of a 3T-dimer-core with four pending carbazole units.…”

Section: Branched Oligothiophenes With Further Functionalitiesmentioning

confidence: 99%

“…As a last example of the functional molecules we refer to a donor-DOT-acceptor system with carbazole donor and a dicyanovinyl acceptor group ( 42 ) synthesized by Zhu et al [ 79 ] The obtained oligomers exhibit a low optical bandgap of 1.7 eV and showed a power conversion efficiency of 1.6% in combination with PC [71]BM in bulk heterojunction solar cells. The functionalization of the branched oligothiophene with donor and acceptor units leads hereby to a spectral broadening and a lowering of the optical bandgap.…”

Section: Branched Oligothiophenes With Further Functionalitiesmentioning

confidence: 99%

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Branched Terthiophenes in Organic Electronics: From Small Molecules to Polymers

Scheuble

Goll

Ludwigs

2014

Macromol. Rapid Commun.

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A zoo of chemical structures is accessible when the branched unit 2,2':3',2″-terthiophene (3T) is included both in structurally well-defined small molecules and polymer-like architectures. The first part of this review article highlights literature on all-thiophene based branched oligomers including dendrimers as well as combinations of 3T-units with functional moieties for light-harvesting systems. Motivated by the perfectly branched macromolecular dendrimers both electropolymerization as well as chemical approaches are presented as methods for the preparation of branched polythiophenes with different branching densities. Structure-function relationships between the molecular architecture and optical and electronic properties are discussed throughout the article.

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Section: Branched Oligothiophenes With Further Functionalitiesmentioning

confidence: 99%

Section: Branched Oligothiophenes With Further Functionalitiesmentioning

confidence: 99%

Branched Terthiophenes in Organic Electronics: From Small Molecules to Polymers

Scheuble

Goll

Ludwigs

2014

Macromol. Rapid Commun.

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“…The typical synthesis of PPCL is illustrated in Scheme 3 and typical FTIR spectra of PPCL and PPPG are shown in Figure 1. The peak at 3419 cm 21 corresponds to stretching vibration of AOH groups and that at 1725 cm 21 to the C@O stretching of the ester group. The peak at 1164 cm 21 corresponds to CAOAC stretching.…”

Section: Synthesis Of a X-phenol Functional Switching Segmentsmentioning

confidence: 99%

“…have been reported. [17][18][19][20][21][22][23][24][25][26] In earlier work, we extended this blending technique for deriving shape memory epoxy, epoxycyanate, bismaleimide resins etc. [27][28][29] These studies addressed mainly the dependency of the concentration of a given component (SS) on the shape memory properties of a matrix.…”

Section: Introductionmentioning

confidence: 99%

Effect of phenol end functional switching segments on the shape memory properties of epoxy‐cyanate ester system

Biju

Nair²

2014

J of Applied Polymer Sci

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The effect of phenol end functional shape memory oligomers on the shape memory properties of an epoxy‐cyanate ester resin system was examined. The basic resin system consisted of diglycidyl ether of bisphenol A (DGEBA) cured with bisphenol A dicyanate (BADC). For conferring the shape memory properties, the switching segment (SS) components selected are α, ω‐phenol‐terminated poly(tetramethyleneoxide) (PPTMO), poly(ε‐caprolactone) (PPCL), and poly(propylene glycol) (PPPG). Epoxy‐cyanate ester blend of defined composition was analyzed for thermal, mechanical, thermo‐mechanical, and shape memory properties at two concentrations of the three SSs. The transition temperature of heavily SS loaded matrix increased in the order: PPTMO < PPCL < PPPG commensurate with crystallizability of SS segments at ambient. For same reason flexural property showed an increasing trend. This is in league with the increased crystallizability of the shape memory polymer components. The shape fixity, recovery extent, and recovery time followed a reverse order: PPPG < PPCL < PPTMO. In contrast to the alcohol terminated shape memory components, phenol terminal groups were helpful in integrating the shape memory segments into the matrix by way of reaction with both epoxy and cyanate groups. The coreaction was conducive for achieving better shape memory properties and decreasing the transition temperature. A direct relation existed between the modulus ratio and the shape recovery property. Higher concentration of the SSs caused a diminution in transition temperature but enhanced the shape memory properties, though the mechanical properties were adversely affected. The shape recovery increased with increase in temperature. All polymers possessed good mechanical properties and thermal stability. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 41196.

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“…7,8 However, natural polymers have disadvantages, such as poor mechanical strength and uncontrolled water uptake. 6 These problems can be minimized by grafting 9,10 or blending [11][12][13] with other polymers.…”

Section: Introductionmentioning

confidence: 99%

Controlled release of naproxen from sodium alginate and poly(vinyl alcohol)/sodium alginate blend beads crosslinked with glutaraldehyde

Şanlı¹,

Solak²

2009

J of Applied Polymer Sci

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In this study, polymeric beads of sodium alginate (NaAlg) and its blend with poly(vinyl alcohol) (PVA) were prepared by crosslinking with glutaraldehyde (2.5% v/v) and hydrochloric acid (3% v/v) for the release of naproxen sodium (NS). The prepared beads were characterized with Fourier transform infrared spectroscopy, and pictures of the beads were determined with an optic microscope. The release studies were carried out at three pH values (1.2, 6.8, and 7.4) for 2 h. The effects of the preparation conditions, including the PVA/NaAlg (w/w) ratio, drug/polymer (w/w) ratio, and time of exposure to the crosslinker, on the release of NS were investigated for 10 h at 37°C. The release of NS decreased with the PVA/NaAlg (w/w) ratio and drug/polymer ratio increasing. At the end of 10 h, the highest release of NS was found to be 84% for the 1/2 PVA/NaAlg (w/w) ratio. The swelling measurements of the beads supported the release results. The release kinetics were described with Fickian and non‐Fickian approaches. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009

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Synthesis of poly(m‐phenyleneisophthalamide) by solid‐state polycondensation of isophthalic acid with m‐phenylenediamine

Cited by 17 publications

References 11 publications

Branched Terthiophenes in Organic Electronics: From Small Molecules to Polymers

Branched Terthiophenes in Organic Electronics: From Small Molecules to Polymers

Effect of phenol end functional switching segments on the shape memory properties of epoxy‐cyanate ester system

Controlled release of naproxen from sodium alginate and poly(vinyl alcohol)/sodium alginate blend beads crosslinked with glutaraldehyde

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