Morphology and Mechanical Properties of Normal Blends and In-Situ Microfibrillar Composites from Low-Density Polyethylene and Poly(ethylene terephthalate)

Jayanarayanan, Karingamanna; Ravichandran, A.; Rajendran, Dhivya; Sivathanupillai, Monikumar; Venkatesan, Abirami; Thomas, Sabu; Joseph, Kuruvilla

doi:10.1080/03602550903414043

Cited by 30 publications

(24 citation statements)

References 20 publications

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“…The result is that the chains of the polymer molecules become very highly aligned, with the polymer bulk possessing vastly improved mechanical properties, such as in Spectra and Tensylon fibers; ii) in-situ fibrillation of polymer blends involves forming high-aspect ratio fibrils made of one polymer, which is oriented in the direction of their length [7][8][9][10][11][12][13][14][15][16] . Their high aspect ratio makes them suitable for efficient load transfer when used as reinforcements.…”

Section: Introductionmentioning

confidence: 99%

Nanofibrillar Polymer-Polymer and Single Polymer Composite Involving Poly(Butylene Terephthalate): Preparation and Mechanical Properties

Panamoottil¹,

Bhattacharyya²,

Fakirov³

2013

Polymer-Plastics Technology and Engineering

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Nanofibrillar composites (NFCs) of polypropylene (PP) and poly(butylene terephthalate) (PBT) were produced with PBT as reinforcement. The two polymers were melt-blended, extruded and cold-drawn via necking in order to convert PBT into a nanofibrillar state. The drawn blend was used for manufacture of NFCs via compression moulding. PBT fibrils were isolated by selective dissolution of PP, and used to produce single polymer composites (SPCs), using a one-constituent approach (hot compaction), and a two-constituent approach (film stacking). NFCs and SPCs were subjected to tensile testing to obtain tensile modulus and tensile strength values. Scanning electron microscopy was used to observe PBT fibrils before and after processing of SPCs, having diameters between 100 and 150 nm. For the SPCs, the improvements in tensile modulus (compared to isotropic PBT) were 32% and 36% for the one constituent and two constituent approach, respectively. The corresponding values for tensile strength were 20% and À18%. NFCs of PP/ PBT showed an improvement of 55% in tensile modulus, and 50.24% in tensile strength as compared to isotropic PP.

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Section: Introductionmentioning

confidence: 99%

Nanofibrillar Polymer-Polymer and Single Polymer Composite Involving Poly(Butylene Terephthalate): Preparation and Mechanical Properties

Panamoottil¹,

Bhattacharyya²,

Fakirov³

2013

Polymer-Plastics Technology and Engineering

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“…According to the reported works using different dispersed components, fibrillar entities represent an isolated well‐dispersed morphology. A wide variety of dispersed components, including polyamide 6 (PA 6), polyamide 66 (PA 66), polybutylenterephthalat (PBT), polyethylene terephthalate (PET), polytetrafluoroethylene (PTFE), and polystyrene (PS) have been applied to generate fibrillar morphology in the polymer matrices such as polypropylene (PP), polyethylene (PE), and polylactide acid (PLA) . Regardless of the type of polymer pairs, based on the enhanced interfacial improvement, all products represent an improved tensile strength.…”

Section: Introductionmentioning

confidence: 99%

Investigation of rheology and morphology to follow physical fibrillar network evolution through fiber spinning of PP/PA6 blend fiber

Hajiraissi

Jahani

Hallmann

2017

Polymer Engineering & Sci

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This work is aimed at investigating the influence of fibrillar morphology of deformed Polyamide 6 (PA6) droplets dispersed in Polypropylene (PP) matrix on the melt viscoelastic behavior of their blends. The blends of PP with various amounts of PA6 (1%, 6%, 10%, and 20%) were prepared by melt mixing in a co‐rotating twin screw extruder and fibrillated by fiber spinning process. Scanning Electron Microscopy revealed that the PA6 spherical droplets form fibrillar inclusions after fiber spinning. The steady and transient shear rheological responses of samples were evaluated in both linear and nonlinear ranges of deformation. Non‐terminal behavior of storage modulus at low frequency appeared as a typical characteristic of fibrillar morphology whose width and value depend on fibril growth. Storage modulus and complex viscosity of the blends containing PA6 fibrillated structure were remarkably enhanced compared to as‐extruded samples. The fibrillar‐induced elasticity of the fibers is a distinguishable behavior which was revealed by conducting transient stress and creep‐recovery measurements and upon appearing mature fibrils, elasticity of the polymer blend fibers increased significantly. POLYM. ENG. SCI., 58:1251–1260, 2018. © 2017 Society of Plastics Engineers

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“…Thus, incorporating reinforcing fibers into iPP is recurrently adopted to enhance its mechanical properties [9][10][11][12]. One of the most frequently used methods is blending the iPP matrix with glass fibers and poly(ethylene terephthalate) (PET) microfibrils [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Crystallization and Microstructure Evolution of Microinjection Molded Isotactic Polypropylene with the Assistance of Poly(Ethylene Terephthalate)

Zhao

Zhang

et al. 2020

Polymers

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In this work, a series of isotactic polypropylene/poly(ethylene terephthalate) (iPP/PET) samples were prepared by microinjection molding (μIM) and mini-injection molding (IM). The properties of the samples were investigated in detail by differential scanning calorimetry (DSC), Wide-Angle X-ray Diffraction (WAXD), Polarized light microscope (PLM) and scanning electron microscopy (SEM). Results showed that the difference in thermomechanical history between both processing methods leads to the formation of different microstructures in corresponding iPP/PET moldings. For example, the dispersed spherical PET phase deforms and emerges into continuous in-situ microfibrils due to the intensive shearing flow field and temperature field in μIM. Additionally, the incorporation of PET facilitates both the laminar branching and the reservation of oriented molecular chains, thereby leading to forming a typical hybrid structure (i.e., fan-shaped β-crystals and transcrystalline). Furthermore, more compact and higher degrees of oriented structure can be obtained via increasing the content of PET. Such hybrid structure leads to a remarkable enhancement of mechanical property in terms of μIM samples.

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Morphology and Mechanical Properties of Normal Blends and In-Situ Microfibrillar Composites from Low-Density Polyethylene and Poly(ethylene terephthalate)

Cited by 30 publications

References 20 publications

Nanofibrillar Polymer-Polymer and Single Polymer Composite Involving Poly(Butylene Terephthalate): Preparation and Mechanical Properties

Nanofibrillar Polymer-Polymer and Single Polymer Composite Involving Poly(Butylene Terephthalate): Preparation and Mechanical Properties

Investigation of rheology and morphology to follow physical fibrillar network evolution through fiber spinning of PP/PA6 blend fiber

Crystallization and Microstructure Evolution of Microinjection Molded Isotactic Polypropylene with the Assistance of Poly(Ethylene Terephthalate)

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