Determination of dual glass transition temperatures of a PC/ABS blend using two TMA modes

Haghighi‐Yazdi, Mojtaba; Lee‐Sullivan, Pearl

doi:10.1007/s10973-008-9831-3

Cited by 32 publications

(13 citation statements)

References 36 publications

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“…The DMA loss modulus curves in Figure 6 confirm the DSC observations of the changes in the glass transition in the presence of the nanofillers. In this case, however, the T g are significantly higher than those observed in the DSC curves, but such behaviour was observed before [16,17], and there could be a number of reasons for this. However, the important thing is that the difference between the T g values for PMMA and PMMA-CoHCF is 6°C, as was also observed from the DSC curves.…”

Section: Resultsmentioning

confidence: 50%

Macro-micro relationship in nanostructured functional composites

Zanotto¹,

Spinella²,

Nasillo³

et al. 2012

Express Polym. Lett.

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Abstract. This paper examines the results of the characterization of two functional composites: Poly(methyl methacrylate) (PMMA)-Ce:YAG (yttrium aluminium garnet doped with cerium) and PMMA-cobalt hexacyanoferrate (CoHCF). The composites were prepared as possible emitters in the fields of lighting thermal sensors. The prepared composites were characterized using transmission electron microscopy (TEM), nuclear magnetic resonance (NMR) spectroscopy, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA) analyses to study the correlation between micro and macro characteristics. We found that the molecular interactions of the two different fillers with the matrix were localized in different sites of the polymer chains. Moreover, the composites showed an increased thermal strength and stiffness, in particular the PMMA-Ce:YAG composite.

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Section: Resultsmentioning

confidence: 50%

Macro-micro relationship in nanostructured functional composites

Zanotto¹,

Spinella²,

Nasillo³

et al. 2012

Express Polym. Lett.

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“…It is observed that the PC has a deficient true melting point distinct from crystalline polymers. However, PC exhibits a property of elevated glass shift in temperature around 150°C [17]. This property makes more complexity in the processing of PC to large melting viscosity, which restricts the fluidity of PC and induces residual stress-producing fractures.…”

Section: A Materials Selectionmentioning

confidence: 99%

“…The contribution of Acrylonitrile (A) supplements could increase its heat resistance, chemical resistance and surface hardness whereas the Styrene (S) enhances its strength, rigidity and process-ability. Similarly, Butadiene (B) helps to improve toughness and impact resistance [17]. Finally, the PC/ABS blended polymer gives high tensile strength, heat resistance, and reduced melting viscosity.…”

Section: A Materials Selectionmentioning

confidence: 99%

Prediction of Process Parameters of Ultrasonically Welded PC/ABS Material Using Soft-Computing Techniques

Chinnadurai¹,

Prabaharan

Saravanan³

et al. 2021

IEEE Access

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Welding process is found to be a predominant procedure in most of the processing industries, especially in the automobile sector for maintenance operation and fabrication. Ultrasonic Polymer Welding (USW) is used for the joining process because of its flexibility and short needed welding time. In this article, two different polymer materials PC and ABS are blended in the ratio of 60:40 and molded into a sheet. Furthermore, molded PC/ABS sheets are joined using USW with different processing parameter settings. Three major influencing process parameters like pressure (P), amplitude (A) and weld time (Tw) are considered and other processing parameters are kept at constant. The experiment is carried out for 26 welded samples and from the obtained results it is noticed that the above-mentioned process parameters directly influence the tensile strength of welded joints. Additionally, the ultrasonically welded samples tensile strength is analyzed with the help of Artificial Neural Network technique (ANN) and Adaptive Neuro-Fuzzy Inference System method (ANFIS). From the simulation results, an optimized ANFIS model provides the superior result as compared to ANN. Moreover, Scanning Electron Microscope analysis is carried out to visualize the weld interface between the joint. Also, Finite Element Modeling (ANSYS) is performed to understand the heat dissipation during the welding process.

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“…The blends dominated mainly by PC (polycarbonate) and ABS (acrylonitrile‐butadiene‐styrene) are important engineering materials, which have good molding flow properties, high HDT and thermal stability, excellent comprehensive mechanical properties and a certain flame retardancy. PC/ABS blends have been widely applied in automobile, appliance, electrical apparatus, defense industry and others …”

Section: Introductionmentioning

confidence: 99%

“…It was also reported that the determination of the glass transition temperature for the small ratio compositions in PC/ABS blends is always a challenge. Yazdi et al successfully determined the double glass transition temperature about PC/ABS blends by using both dilatometer and dilatometer probe in the thermal mechanical analysis (TMA).…”

Section: Introductionmentioning

confidence: 99%

Study on effects of short glass fiber reinforcement on the mechanical and thermal properties of PC/ABS composites

Zhao

Guan

Wang

et al. 2014

J of Applied Polymer Sci

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This article mainly investigated the length distributions of the alkali-free short glass fibers in specimens and their effect on the mechanical and thermal properties of the composites. The results show that the initial length, addition level and feed way of the fibers have obvious effects on the length distributions of fibers in specimens, and thereby the mechanical and thermal properties of the composites. The main-direction feed way has an intense shear action on the fibers in specimens. With the increase of the fiber content, the reinforcing effect of fibers on the tensile strength, flexural strength and flexural modulus of the composites is increased, while the impact strength is decreased first and then tends to be stable, and the strength factor (F) of the tensile strength to weld line is significantly reduced. The longer the fiber lengths in specimens are, the more obvious the reinforcing and toughening effects are. To some extent, with the increase of the fiber content, the storage modulus (E 0 ) and loss modulus (E 00 ) of the specimens are increased, but the loss factor (Tan d) is reduced. The effect of the fiber initial lengths on the heat-degradation of composites is smaller than that of the fiber content. Meanwhile, adding fibers can improve the thermal stability of the composites, and this law is also confirmed by the heat deflection temperature (HDT) test.The blends dominated mainly by PC (polycarbonate) and ABS (acrylonitrile-butadiene-styrene) are important engineering materials, which have good molding flow properties, high HDT and thermal stability, excellent comprehensive mechanical properties and a certain flame retardancy. PC/ABS blends have been widely applied in automobile, appliance, electrical apparatus, defense industry and others. 11-17 PC/ABS melt presents a pseudo-plastic flow characteristic of the shear-thinning and their composites show a strong nonlinear behavior under the impact and compression. 17,18 Meanwhile, although there is certain compatibility between PC and ABS, the further modification of compatibility is still needed to obtain higher performance of PC/ABS blends. The related studies have found that some additives (EVA-g-MAH, SMA, etc.) can improve the compatibility between PC and ABS, thereby improve the impact performance and elongation of materials. 18,19 The researches from Din and Hashemi 2 and Hashemi and coworkers. 20-23 showed that when the reinforcing fibers are added into composites, the tensile strength, flexural strength, tensile modulus, and flexural modulus of the plastic parts are improved at different degrees, and elongation, work of fracture are decreased. Meanwhile, the weld line strength factor will be

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Determination of dual glass transition temperatures of a PC/ABS blend using two TMA modes

Cited by 32 publications

References 36 publications

Macro-micro relationship in nanostructured functional composites

Macro-micro relationship in nanostructured functional composites

Prediction of Process Parameters of Ultrasonically Welded PC/ABS Material Using Soft-Computing Techniques

Study on effects of short glass fiber reinforcement on the mechanical and thermal properties of PC/ABS composites

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