Polymer Synthesis: Theory and Practice

Braun, Dietrich; Cherdron, Harald; Rehahn, Matthias; Ritter, Helmut; Voit, Brigitte

doi:10.1007/978-3-642-28980-4

Cited by 96 publications

(27 citation statements)

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“…During the softening of a glassy polymer, intermolecular forces are not suddenly overcome by thermal motions because molecular chains undergo different types of motions. Once the temperature is above the T g , the micro‐Brownian motion becomes so prominent in crosslinked polymers that the material softens and can be deformed by external forces . Thus, the decrease in storage modulus near T g for all the composites can be ascribed to the increased micro‐Brownian motion of the crosslinked segments in the matrix.…”

Section: Resultsmentioning

confidence: 98%

Mechanical, thermal, and burning properties of viscose fabric composites: Influence of epoxy resin modification

Rajan

Rainosalo

Ramamoorthy

et al. 2018

J of Applied Polymer Sci

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The influence of epoxy resin modification by 3‐aminopropyltriethoxysilane (APTES) on various properties of warp knitted viscose fabric is reported in this study. Dynamic mechanical, impact resistance, flexural, thermal properties, and burning behavior of the epoxy/viscose fabric composites are studied with respect to varying content of silane coupling agent. The results obtained for APTES‐modified epoxy resin based composites reinforced with unmodified viscose fabric composites are compared to unmodified epoxy resin based composites reinforced with APTES‐modified viscose fabric. The dynamic mechanical behavior of the APTES‐modified resin based composites indicates improved interfacial adhesion. The composites prepared from modified epoxy resin exhibited a twofold increase in impact resistance. The improved adhesion between the fiber and modified resin was also visible from the scanning electron microscope analysis of the impact fracture surface. There was less influence of resin modification on the flexural properties of the composites. The 5% APTES modification induced early degradation of composites compared to all other composites. The burning rate of all the composites under study is rated to be satisfactory for use in automotive interior applications. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46673.

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Section: Resultsmentioning

confidence: 98%

Mechanical, thermal, and burning properties of viscose fabric composites: Influence of epoxy resin modification

Rajan

Rainosalo

Ramamoorthy

et al. 2018

J of Applied Polymer Sci

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“…The correct synthesis of the base polymer does not only affect the nanofiber properties but also determines the electrospinning characteristics in the nanofiber manufacturing. In parallel, another important step is to choose the right synthesis methodology among several conventional polymer synthesis methodologies (Braun et al, 2013) in order to obtain the base polymers with proper molecular weight and polydispersity characteristics required for the electrospinning process. These characteristics of the synthesized polymer must be well characterized and reported.…”

Section: Synthesis and Characterization Of A Custom Polymermentioning

confidence: 99%

Interlayer toughening mechanisms of composite materials

Bilge

Papila

2015

Toughening Mechanisms in Composite Materials

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“…Limited viscosity numbers [ η ] of the obtained poly(ether‐imide)s in DMAc at 30°C as well as the results of GPC analyses are listed in Table . Three solutions with concentrations of 0.10, 0.25, and 0.50 g dl −1 in DMAc were prepared to measure [ η ] values according to the literature . The obtained limited viscosity numbers were in the range of 0.76–0.91 dl g −1 .…”

Section: Resultsmentioning

confidence: 99%

Novel ortho‐linked fluorinated poly(ether‐imide)s based on 2,2′‐substituted 1,1′‐binaphthyl units

Behniafar

Hosseinpour

2012

Polymers for Advanced Techs

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In this research, a new fluorinated diamine based on 2,2′‐substituted 1,1′‐binaphthyl units, 2,2′‐bis(2‐amino‐4‐trifluoromethylphenoxy)‐1,1′‐binaphthyl (AFPBN) was synthesized and then used to prepare the corresponding ortho‐linked poly(ether‐imide)s via chemical polyimidization with several aromatic carboxylic dianhydrides. The resulting poly(ether‐imide)s were fully characterized by FT‐IR, NMR, viscosity measurements, gel‐permeation chromatography, UV–vis, X‐ray diffraction, organo‐solubility, thermogravimetric analysis (TGA), and differential scanning calorimetry. Probing optical behavior of the colorless films prepared from these poly(ether‐imide)s demonstrated that they possess a high degree of optical transparency, and UV–visible absorption cut‐off wavelength values were found to be in the range of 404–471 nm. The resulting polymers exhibited excellent organo‐solubility in polar solvents such as dimethylformamide, dimethyl sulfoxide, pyridine, and even tetrahydrofuran. To investigate the heat stability of the samples, their thermograms obtained from TGA were plotted, and for example, it is found that the 10% weight loss temperature of representative polymer AFPBN/3,3′,4,4′‐benzophenonetetracarboxylic dianhydride occurred at 532°C in nitrogen. These poly(ether‐imide)s had glass‐transition temperatures (Tg's) up to 280°C. Two previously prepared analogues of AFPBN, i.e. nonfluorinated diamine DAM1 and para‐linked fluorinated diamine DAM2 used to prepare the corresponding poly(ether‐imide)s, were also considered to compare the results obtained. Copyright © 2012 John Wiley & Sons, Ltd.

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Polymer Synthesis: Theory and Practice

Cited by 96 publications

References 0 publications

Mechanical, thermal, and burning properties of viscose fabric composites: Influence of epoxy resin modification

Mechanical, thermal, and burning properties of viscose fabric composites: Influence of epoxy resin modification

Interlayer toughening mechanisms of composite materials

Novel ortho‐linked fluorinated poly(ether‐imide)s based on 2,2′‐substituted 1,1′‐binaphthyl units

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