Effects of Carbon Fillers on Crystallization Properties and Thermal Conductivity of Poly(phenylene sulfide)

Deng, Shuling; Lin, Zhidan; Xu, Biao; Lin, Hubin; Du, Chongmin

doi:10.1080/03602559.2014.986802

Cited by 19 publications

(8 citation statements)

References 24 publications

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“…The heat of fusion of crystalline PPS is 76.5 J/g [28]. Since the MWCNTs act as nucleation agents, many studies have reported that MWCNTs can promote the crystallization via the nucleation effect [29,30,31]. The experimental data were consistent with the reports on the nucleation effect of the MWCNTs.…”

Section: Resultssupporting

confidence: 77%

Effects of Covalent Functionalization of MWCNTs on the Thermal Properties and Non-Isothermal Crystallization Behaviors of PPS Composites

et al. 2017

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Abstract:In this study, a PPS/MWCNTs composite was prepared with poly(phenylene sulfide) (PPS), as well as pristine and covalent functionalized multi-walled carbon nanotubes (MWCNTs) via melt-blending techniques. Moreover, the dispersion of the MWCNTs on the PPS matrix was improved by covalent functionalization as can be seen from a Field-Emission Scanning Electron Microscope (FE-SEM) images. The thermal properties of the PPS/MWCNTs composites were characterized using a thermal conductivity analyzer, and a differential scanning calorimeter (DSC). To analyze the crystallization behavior of polymers under conditions similar with those in industry, the non-isothermal crystallization behaviors of the PPS/MWCNTs composites were confirmed using various kinetic equations, such as the modified Avrami equation and Avrami-Ozawa combined equation. The crystallization rate of PPS/1 wt % pristine MWCNTs composite (PPSP1) was faster because of the intrinsic nucleation effect of the MWCNTs. However, the crystallization rates of the composites containing covalently-functionalized MWCNTs were slower than PPSP1 because of the destruction of the MWCNTs graphitic structure via covalent functionalization. Furthermore, the activation energies calculated by Kissinger's method were consistently decreased by covalent functionalization.

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Section: Resultssupporting

confidence: 77%

Effects of Covalent Functionalization of MWCNTs on the Thermal Properties and Non-Isothermal Crystallization Behaviors of PPS Composites

et al. 2017

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“…With the continuous increase of GQDs content, the dispersion of GQDs in PPS/GQDs nanocomposites decreases and agglomeration occurs, which is not conducive to stress transfer, resulting in poor stress concentration points and the reduction of tensile strength and impact strength. [ 53 ]…”

Section: Resultsmentioning

confidence: 99%

Preparation, Crystallization Behavior, Simultaneous Spectroscopic and Rheological Characterization of Polyphenylene Sulfide/Graphene Quantum Dots Nanocomposites

Wang

Zhen

et al. 2022

Macro Chemistry & Physics

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Graphene quantum dots are prepared conveniently and quickly with brown-black humic acid as raw material by green oxidation process. The average size of GQDs is about 12 nm with a lattice spacing of 0.26 nm and GQDs have hydroxyl and carboxyl functional groups on their surface. Moreover, photoluminescence testing shows that GQDs have excellent photoluminescence properties with maximum excitation/emission wavelength at 347/478 nm. Next, polyphenylene sulfide (PPS)/GQDs nanocomposites are prepared by melt blending with GQDs and PPS. Mechanical tests show that the tensile strength and the impact strength of PPS can be greatly improved when the amount of GQDs is 0.5 wt% and tensile strength and the impact strength are increased by 53.38% and 375%, respectively. The nonisothermal crystallization of PPS/GQDs nanocomposites is investigated by differential scanning calorimetry, which shows that GQDs effectively increase the crystallization rate of PPS. The crystallization of PPS/GQDs nanocomposites during cooling are studied by Rheonaut technology analysis. The rheological results show that the storage modulus of PPS/GQDs (0.5 wt%) nanocomposites is increased by about 1.04 times than that of pure PPS, and 2D IR spectrum confirms that GQDs accelerate crystallization of PPS. Rheological studies present that GQDs have good compatibility with PPS.

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“…

where

, and

represent the weight percentage of the PPS, the heat of fusion at the melting point of the PPS/MWCNTs/AlN composites, and the heat of fusion of the crystalline PPS, which was known as 76.5 J/g [ 38 ], respectively. Many studies have reported that the MWCNTs, which is a nucleation agent, can facilitate the crystallization by the nucleation effect [ 11 , 34 , 39 , 40 ]. The experimental data were consistent with the literatures on the nucleation effect of the MWCNTs.…”

Section: Resultsmentioning

confidence: 99%

“…Kostagiannakopoulou et al and Ciecierska et al conducted a study to improve the thermal conductivity from 0.29 W/mK for neat epoxy to 0.36 W/mK for 3 wt % MWCNTs loaded epoxy composites and 0.13 W/mK for neat epoxy to 0.24 for 5 wt % MWCNTs loaded epoxy composites [ 9 , 10 ]. Deng et al conducted the study to improve thermal conductivity and crystallization properties by introducing carbon based filler such as MWCNTs, and carbon fiber on the PPS matrix [ 11 ]. However, the covalent functionalization was widely used for modifying the surface of the MWCNTs because the MWCNTs can be easily aggregated with themselves, which adversely affected the thermal properties of the polymer nanocomposites, due to strong van der Waal’s interactions between individual tubes [ 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Grafting Reaction of Aluminum Nitride on the Multi-Walled Carbon Nanotubes on the Thermal Properties of the Poly(phenylene sulfide) Composites

Kim

Park

2017

Polymers

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Abstract:In this study, the PPS/MWCNTs/AlN composite was prepared with poly(phenylene sulfide) (PPS), covalent functionalized multi-walled carbon nanotubes (fMWCNTs), and aluminum nitride (AlN) via melt-blending techniques. The AlN is a fascinating non-oxidizing ceramic material having the highest thermal conductivity among the ceramic materials. In order to introduce the functional groups on the surface of the AlN particles, a silane coupling agent was used as it is able to graft with the functional groups on the covalent functionalized MWCNTs. The silanization reaction of the AlN was confirmed qualitatively and quantitatively by FT-IR (Fourier Transform Infrared Spectroscopy), and XPS (X-ray Photoelectron Spectroscopy). The grafting reaction of the AlN particles on the MWCNTs was confirmed using UV-Vis (Ultraviolet-Visible Spectroscopy), FE-SEM (Field-Emission Scanning Electron Microscopy) and FE-TEM (Field-Emission Transmission Electron Microscopy) images. The grafting reaction was accomplished by observing the change of the transmittance, the morphology of the AlN particle bonded to the MWCNTs. For the morphological changes of the fractured surface of the PPS/MWCNTs/AlN composites by FE-SEM, the hybrid filler was homogeneously dispersed on the PPS matrix when the AlN particle was grafted on the MWCNTs. The homogeneous distribution of the hybrid filler acts as a heat transfer path, which led the higher thermal properties, such as thermal conductivity, thermal resistance, and melting temperature than those of not grafted MWCNTs.

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Effects of Carbon Fillers on Crystallization Properties and Thermal Conductivity of Poly(phenylene sulfide)

Cited by 19 publications

References 24 publications

Effects of Covalent Functionalization of MWCNTs on the Thermal Properties and Non-Isothermal Crystallization Behaviors of PPS Composites

Effects of Covalent Functionalization of MWCNTs on the Thermal Properties and Non-Isothermal Crystallization Behaviors of PPS Composites

Preparation, Crystallization Behavior, Simultaneous Spectroscopic and Rheological Characterization of Polyphenylene Sulfide/Graphene Quantum Dots Nanocomposites

Effect of the Grafting Reaction of Aluminum Nitride on the Multi-Walled Carbon Nanotubes on the Thermal Properties of the Poly(phenylene sulfide) Composites

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