Rheological behavior comparison between PET/HDPE and PC/HDPE microfibrillar blends

Xu, Hongsheng; Li, Zhong‐Ming; Yang, Shuying; Pan, Jilin; Yang, Wei; Yang, Ming‐Bo

doi:10.1002/pen.20381

Cited by 34 publications

(21 citation statements)

References 30 publications

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“…Figures 7 and 8 show that HDPE appeared as an island or in droplet form surrounded by the molten rPET phases. This is because HDPE with a higher viscosity has the opportunity to form agglomeration into an island form in the molten rPET phase [21,22]. The virgin HDPE with long molecular chains was forced to agglomerate because of limited mobility.…”

Section: Morphological Analysismentioning

confidence: 97%

Effect of MMT concentrations as reinforcement on the properties of recycled PET/HDPE nanocomposites

Rosnan¹,

Arsad²

2013

Journal of Polymer Engineering

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The objective of this research is to investigate the effect of incorporating montmorillonite (MMT) on the mechanical, morphological, rheological, and thermal properties of recycled poly(ethylene terephthalate) (rPET) and high-density polyethylene (HDPE) nanocomposites. The MMT contents in 90:10 rPET/HDPE and 70:30 rPET/ HDPE ranged from 1 to 5 wt.%. rPET/HDPE nanocomposites were prepared by using a single screw extruder, and injection molded to prepare mechanical test specimens. The samples underwent rheological tests by using a capillary rheometer, and the morphology of the nanocomposites was investigated by scanning electron microscopy (SEM). The thermal stability of the nanocomposites was tested using thermogravimetric analysis (TGA). The results showed that MMT acts as compatibilizing agent and improves phase dispersion and interfacial adhesion in the nanocomposites. The maximum tensile strength was found at 3 and 1 wt.% of MMT for the 90:10 and 70:30 rPET/HDPE blends. However, the tensile modulus decreased significantly with the incorporation of MMT. The impact strength for both the 90:10 and 70:30 blends reached a maximum at 3 wt.% and started to decrease beyond 3 wt.%. The incorporation of MMT increased the shear viscosity of the 90:10 and 70:30 blends, which reached a maximum value at 3 and 1 wt.%. SEM micrographs showed a good interaction of MMT that improved the adhesion between the two phases of blends and led to an increase in the mechanical properties of rPET/HDPE nanocomposites.

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Section: Morphological Analysismentioning

confidence: 97%

Effect of MMT concentrations as reinforcement on the properties of recycled PET/HDPE nanocomposites

Rosnan¹,

Arsad²

2013

Journal of Polymer Engineering

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“…It is well known that fibrillar morphology can greatly improve the mechanical properties of the fiber/ polymer composites. Composites containing conductive fibers have lower percolation thresholds than the ones having spherical conductive particles [13,14]. Microfiber reinforced conductive polymer composites are generally prepared by extrusion of an incompatible thermoplastic polymer pair with conductive filler in which the conductive particles selectively locate in the dispersed polymer phase, and the dispersed polymer/conductive filler phase forms microfibers in situ by hot stretching [1,15,16].…”

Section: Introductionmentioning

confidence: 99%

Effect of microfiber reinforcement on the morphology, electrical, and mechanical properties of the polyethylene/poly(ethylene terephthalate)/carbon nanotube composites

Yeşil

Köysüren

Bayram

2010

Polymer Engineering & Sci

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In situ microfiber reinforced conductive polymer composites consisting of high-density polyethylene (HDPE), poly(ethylene terephthalate) (PET), and multiwalled carbon nanotube (CNT) were prepared in a twin screw extruder followed by hot stretching of PET/CNT phase in HDPE matrix. For comparison purposes, the HDPE/PET blends and HDPE/PET/CNT composites were also produced without hot stretching. Extrusion process parameters, hot-stretching speed, and CNT amount in the composites were kept constant during the experiments. Effects of PET content and molding temperature on the morphology, electrical, and mechanical properties of the composites were investigated. Morphological observations showed that PET/CNT microfibers were successfully formed in HDPE phase. Electrical conductivities of the microfibrillar composites were in semi-conductor range at 0.5 wt% CNT content. Microfiber reinforcement improved the tensile strength of the microfibrillar HDPE/PET/CNT composites in comparison to that of HDPE/PET blends and HDPE/ PET/CNT composites prepared without hot stretching POLYM. ENG. SCI., 50:2093-2105, 2010. ª 2010 Society of Plastics Engineers INTRODUCTIONRecently, there is a great interest in industry on electrically semiconductor materials with superior mechanical properties and thermal stability [1]. Especially, conductive polymer composites have received significant attention for use in various engineering applications such as sensors, antistatic coatings, electromagnetic interference shielding, and electrolytes in the fuel cells [2,3]. They are generally a synergetic combination of conductive filler and insulating polymer matrix. They exhibit a series of unique features, such as a percolation phenomenon, sensitivity to pressure, temperature and gas, improved mechanical and thermal properties.Conductive polymer composites are usually prepared by incorporating conductive fillers into polymer matrix through melt mixing either by using an extruder or an internal mixer. However, to obtain high electrical conductivity with this method, high loadings of the conductive fillers are usually required, which may result in poor mechanical properties and high cost [4][5][6][7][8]. In the literature, several processing techniques have been used to lower the percolation threshold, in which electrical conductivity of composite increases by several orders of magnitude with the formation of current conductive structures [2]. These techniques are in situ polymerization of the polymer in the presence of conductive particles [9] and selective localization of conductive filler in one of the phases or at the interface of a polymer blend composed of two polymer constituents, in which filler forms the conductive network in the dispersed phase. This phase also constitutes continuous conductive structure in the major phase, which is called as double percolation [10][11][12]. However, in situ polymerization technique is hard to apply in the industrial scale, and in the second technique the incompatible nature of the polymer constituents of th...

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“…However, when the viscosity ratio is far lower than 1, irregular cylindrical shape is observed. It has been reported that when the viscosity ratio is close to 1, the matrix can exert the strongest drag force on the dispersed phase . Actually, the increase of matrix viscosity can also lead to the change of diameter and distribution of dispersed particles.…”

Section: Resultsmentioning

confidence: 99%

In Situ Microfibril Structure in Incompatible Isotactic Polypropylene/Polylactic Acid Blends Controlled By Viscosity Ratio

Cui

Lin

et al. 2020

Polymer Engineering & Sci

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In situ microfibril structure can significantly improve the mechanical properties of incompatible blends. In this work, the in situ microfibrils were constructed in isotactic polypropylene/polylactic acid (iPP/PLA) blends by direct injection molding process, and the effect of viscosity ratio on the morphology was systematically analyzed. The results of scanning electron microscope and rheology show that the viscosity ratio plays a decisive role in the formation of in situ microfibrils. When the viscosity ratio of PLA/iPP is near 1, deformation and microfibrillation of PLA particles can be conducted due to the larger and more uniform distributed PLA domains as well as stronger viscous drag forces. However, irregular cylinders are observed when the viscosity ratio is far lower than 1. The poor deformation ability of PLA particles should be attributed to the much smaller size and weaker viscous drag forces. The well‐defined PLA microfibrils are conducive to avoid damage at the interface, and play a significant role in the enhancement of tensile strength and modulus. This work can simplify the traditional preparation process, construct in situ microfibrils directly by using conventional melt processing techniques and provide a new ideal for the high performance of incompatible polymer blends. POLYM. ENG. SCI., 60:832–840, 2020. © 2020 Society of Plastics Engineers

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Rheological behavior comparison between PET/HDPE and PC/HDPE microfibrillar blends

Cited by 34 publications

References 30 publications

Effect of MMT concentrations as reinforcement on the properties of recycled PET/HDPE nanocomposites

Effect of MMT concentrations as reinforcement on the properties of recycled PET/HDPE nanocomposites

Effect of microfiber reinforcement on the morphology, electrical, and mechanical properties of the polyethylene/poly(ethylene terephthalate)/carbon nanotube composites

In Situ Microfibril Structure in Incompatible Isotactic Polypropylene/Polylactic Acid Blends Controlled By Viscosity Ratio

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