Preparation and characterization of an aromatic polyester/polyaniline composite and its improved counterpart

Wu, Chung Hsien

doi:10.3144/expresspolymlett.2012.49

Cited by 23 publications

(13 citation statements)

References 32 publications

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“…DSC thermograms are consistent with previous literature results from PBT 20 . The higher the aging temperature, the more intense and shifted to higher temperatures is the secondary melting peak.…”

Section: Dsc/tg Analysessupporting

confidence: 82%

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Mechanical and Thermo-Physical Properties of Short Glass Fiber Reinforced Polybutylene Terephthalate upon Aging in Lubricant/Refrigerant Mixture

et al. 2016

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In this study, the relationship between structure and mechanical properties of aged PBT composite was investigated. Short glass fiber reinforced PBT composites were subjected to aging tests in environments typically found in hermetic compressors. Diffusion kinetics were addressed by a periodic control of samples weight, and samples aged in oil presented mass variation of 1.2-1.6%, depending on test temperature. Most diffusion curves followed Fickian behavior, and the diffusion coefficient for each condition was obtained. Aging effect was investigated by 3-point bending tests, where samples aged at 180°C presented a significant reduction in all evaluated properties. Control environment induced minor variations, supposedly related to physical aging and increase in crystallinity. Imaging analyses through scanning electronic microscopy (SEM) technique allowed observation of the predominant fracture mechanism. Aged samples presented few or no localized plastic deformation at all, which is in accordance with the lower strain observed in mechanical tests. Differential scanning calorimetry (DSC) analyses proved degree of crystallinity increase for all aged samples, depending mainly on temperature of exposure. Infrared (FTIR) analysis proved the presence of oil absorbed in PBT chemical structure, and it was proposed a method for comparing degree of crystallinity, based on the absorbance bands ratio A0(1458 cm -1 )/A0(956 cm -1 ).

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Section: Dsc/tg Analysessupporting

confidence: 82%

“…It was used sealed aluminum crucibles, and samples mass of about 14 mg. Crystallinity degree was calculated from equation 5, based on a theoretical 100% crystalline PBT heat of fusion of 140 J/mol 19,20 .…”

Section: Thermal Analysesmentioning

confidence: 99%

Mechanical and Thermo-Physical Properties of Short Glass Fiber Reinforced Polybutylene Terephthalate upon Aging in Lubricant/Refrigerant Mixture

et al. 2016

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“…Table 5. 13 C-NMR experimental values of PANI [37][38][39] . were observed the energy for diverse models, proven that the reaction was carried out.…”

Section: Resultsmentioning

confidence: 99%

Spectroscopy analyses of polyurethane/polyaniline IPN using computational simulation (Amber, MM+ and PM3 method)

2014

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Abstract:The polyurethane (PU)/polyaniline (PANI) IPN, at three composition ratios (95/05, 75/25, 60/40), were analyzed, after the action of the urease enzyme, by means of the Hyperchem 8v software. Theoretical analysis of Gibbs free energy, FTIR, and 13 C-NMR were done. The generation of functional groups due to hydrolysis was analyzed by FTIR. The 13 C-NMR spectra of the three ratios showed a superposition of the individual spectra of PU and PANI and an appreciable decrease of the signals due to the action of the urease enzyme. The orbits showed that the electron density of the HOMO (Highest Occupied Molecular Orbital) is predominantly localized on the C-C bond, indicating that the binding of PU/PANI with the urease enzyme contains a vacant d-orbital. It is concluded that the adsorption of the urease enzyme increases the degree of hydrolysis of the IPN.

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“…The FT-IR spectra [31,32] of terpolymers selected from each series are shown in Figure 3 and 4. Obtained copolymers had all characteristic bands for esters, aliphates or ether, and amides, which are presented in Table 4.…”

Section: Chemical Structure Of Tpesmentioning

confidence: 99%

Synthesis and Properties of Multiblock Terpoly(Ester-Aliphatic- Amide) and Terpoly(Ester-Ether-Amide) Thermoplastic Elastomers with Various Chemical Compositions of Ester Block

Rokicka¹,

Ukielski²

2015

Thermoplastic Elastomers - Synthesis and Applications

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Two series of thermoplastic elastomers with various chemical compositions of ester block were prepared via the reaction of ,ω-dicarboxylic oligo laurolactam P" , Mw≈ g/mol with oligo oxytetramethylene diol PTMO, Mw≈ g/mol or linoleic alcohol dimer DL"ol and with dimethyl terephthalate and a low molecular weight glycol forming during the synthesis of the ester block . The degree of polycondensation DP GT of poly multi-methylene terephtalate equals to DP GT = . The influence of the number of carbons separating the terephtalate groups, as well as the effect of meta-or para-positions of the ester groups in the benzene ring of other blocks, on the synthesis, properties and structure of these elastomers have been evaluated. " nuclear magnetic resonance spectroscopy to carbon C NMR and Fourier transform infrared spectroscopy FT-IR were used to confirm their assumed chemical structure.The influence of chemical compositions of ester block on the functional properties and on the values of phase transition temperatures of the products have been determined.The thermal properties and the phase separation of obtained systems were defined by differential scanning calorimetry DSC , dynamic mechanical thermal analysis DMT" , wide-angle x-ray diffraction W"XS and other standard physical methods.The mechanical and elastic properties of obtained polymers were evaluated.

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Preparation and characterization of an aromatic polyester/polyaniline composite and its improved counterpart

Cited by 23 publications

References 32 publications

Mechanical and Thermo-Physical Properties of Short Glass Fiber Reinforced Polybutylene Terephthalate upon Aging in Lubricant/Refrigerant Mixture

Mechanical and Thermo-Physical Properties of Short Glass Fiber Reinforced Polybutylene Terephthalate upon Aging in Lubricant/Refrigerant Mixture

Spectroscopy analyses of polyurethane/polyaniline IPN using computational simulation (Amber, MM+ and PM3 method)

Synthesis and Properties of Multiblock Terpoly(Ester-Aliphatic- Amide) and Terpoly(Ester-Ether-Amide) Thermoplastic Elastomers with Various Chemical Compositions of Ester Block

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