Mechanical, Thermal and Morphological Behaviours of Polybutylene Terephthalate/Polycarbonate Blend Nanocomposites

Rajakumar, Perumal; Nanthini, R.

doi:10.18052/www.scipress.com/ilcpa.9.15

Cited by 13 publications

(11 citation statements)

References 69 publications

(72 reference statements)

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“…The α WAXS values are reported in Table 1, together with the crystallinity values obtained by FTIR and DSC for the sake of comparison. As above indicated, all the three methods show different values, but, in any case, the degree of crystallinity increases slightly and linearly with the clay content, as previously reported by several authors [28][29][30]. This tendency is more evident in the case of the α WAXS values.…”

Section: Waxssupporting

confidence: 81%

Nanostructural characterization of poly (vinylidene fluoride)-clay nanocomposites prepared by a one-step reactive extrusion process

Benabid¹,

Rong²,

Benachour³

et al. 2014

Journal of Polymer Engineering

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Poly (vinylidene fluoride) (PVDF)-untreated clay nanocomposites were successfully prepared using an innovative one-step reactive melt extrusion process. Through specific temperature and shear conditions, the chemical reactions took place between the polymer matrix, the inorganic clay particles, and three main reactive agents: an organic peroxide, sulfur, and a specific activator led finally to the PVDF-clay nanocomposites. The materials were formulated with various amounts of clay in order to identify the best conditions, enabling to obtain the optimal particle exfoliation in the polymer matrix at the nanometric scale. The microstructure and nanostructure modifications were characterized by Fourier transform infrared (FTIR) spectroscopy, differential scanning calorimetry (DSC), and wide-and small-angle X-ray scattering (WAXS and SAXS). The relationship between nanostructure and mechanical behavior was investigated by tensile experiments, impact tests, and microhardness measurements. The FTIR results suggest that there is a chemical interaction between the clay and the polymer. Furthermore, the WAXS study shows that no intercalation step takes place in any composition. In addition to this, the sample with 2.5 wt.% clay could present a total exfoliation of the clay particles. The PVDF matrix is found to be exclusively of the α-form in all compositions. The final microhardness slightly increases with both nanoclay content and degree of crystallinity.

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Section: Waxssupporting

confidence: 81%

Nanostructural characterization of poly (vinylidene fluoride)-clay nanocomposites prepared by a one-step reactive extrusion process

Benabid¹,

Rong²,

Benachour³

et al. 2014

Journal of Polymer Engineering

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“…The previous researches in our group have proved that transesterification reactions took place in the present processing condition for the PBT/PC blends. [11][12][13][14] In this part, the influence of c-MWCNT on the transesterification reactions was analyzed by FTIR test. Figure 1(a) shows the FTIR results of pure PBT and PC.…”

Section: Resultsmentioning

confidence: 99%

“…PBT/PC blends have been used in automotive industry, outdoor power, appli-ance housings and so on. [8][9][10][11][12][13][14] For the PBT/PC blends, most researches have been focused on the transesterification reactions, thermal properties, miscibility, phase morphology and impact modification. [15][16][17][18][19] Recently, nanocomposites based on PBT/PC blends attracted much attention.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Properties of PBT/PC Blends with the Addition of Carboxyl-functionalized Multiwalled Carbon Nanotube

Hu¹,

Song²,

Lv³

et al. 2018

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Carboxyl-functionalized multiwalled carbon nanotube (c-MWCNT) was used to enhance the properties of poly(butylene terephthalate)/polycarbonate (PBT/PC) blends by melt blending. The c-MWCNT inhibited transesterification reactions between PBT and PC. SEM result showed that most of the c-MWCNT dispersed in the PBT matrix and partial c-MWCNT lied between the interface of PBT and PC phases. c-MWCNT promoted the crystallization of PBT due to the decreased transesterification and the heterogeneous nucleating effect, which led to a 20 o C increase of the crystallization temperature. DMA test indicated that the miscibility between PBT and PC decreased with the c-MWCNT loading since the inhibited transesterification. When the c-MWCNT content was 4 wt%, the yield strength of 65.9 MPa and tensile modulus of 2116 MPa were achieved, which corresponded to 23.9 and 19.5% increase relative to the pure PBT/ PC blend. The conductivity and dielectric properties of PBT/PC were largely enhanced by the c-MWCNT. The σ d c values of PBT/PC improved greatly by several orders of magnitude from 10-1 8 to 10-7 when the c-MWCNT content was 2 wt%. The dielectric constant at 100 Hz for the nanocomposites increased from 2.8 to 146 when the c-MWCNT loading varied from 0.1 to 4 wt%, which improved more than 50 times.

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“…The storage modulus of silane-treated MMT composite is higher than that of the untreated one because after treatment interaction between the matrix and the filler increases and MMT layers act as nanoentities which contributes to stress sharing during load application and hinders the mobility of the molecules. Storage modulus depends upon the aspect ratio of the fillers [39]. As aspect ratio increases, stress sharing between the fillers and host also increases consequently increasing stiffness.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Modified MMT/Glass/Vinylester Multiscale Composites and Their Mechanical Properties

Mittal

Dhand

Ryu

et al. 2015

Journal of Nanomaterials

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Montmorillonite (MMT) may become a preferred filler material for fiber-reinforced polymer (FRP) composites due to its high aspect ratio, large surface area, and low charge density. In the present paper, MMT/glass/vinylester multiscale composites are prepared with untreated and surface-treated MMT clay particles with an MMT content of 1.0 wt%. Effects of surface treatment on mechanical properties of MMT/glass/vinylester multiscale composites are investigated through tensile and bending tests, which revealed enhanced mechanical properties in the case of surface-treated MMT. Thermal properties are studied through thermogravimetric analysis (TGA) and dynamic mechanical analysis (DMA). X-Ray diffraction is performed to investigate the interaction between MMT and the matrix. Fourier Transform Infrared (FTIR) is also performed for both untreated and surface-treated MMT. Furthermore, Field Emission-Scanning Electron Microscope (FE-SEM) is conducted to investigate the path of fracture propagation within the composite surface, showing that the surface-treated MMT based multiscale composite has better interactions with the host matrix than the untreated MMT multiscale composites. These composites with enhanced mechanical strength can be used for various mechanical applications.

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Mechanical, Thermal and Morphological Behaviours of Polybutylene Terephthalate/Polycarbonate Blend Nanocomposites

Cited by 13 publications

References 69 publications

Nanostructural characterization of poly (vinylidene fluoride)-clay nanocomposites prepared by a one-step reactive extrusion process

Nanostructural characterization of poly (vinylidene fluoride)-clay nanocomposites prepared by a one-step reactive extrusion process

Enhanced Properties of PBT/PC Blends with the Addition of Carboxyl-functionalized Multiwalled Carbon Nanotube

Fabrication of Modified MMT/Glass/Vinylester Multiscale Composites and Their Mechanical Properties

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