Investigation of the Properties of Polyetheretherketone Blends and Carbon-Filled Composites Based on them

2021 ◽  
Vol 899 ◽  
pp. 426-433
Author(s):  
Azamat L. Slonov ◽  
Ismel V. Musov ◽  
Elena V. Rzhevskaya ◽  
Khasan V. Musov ◽  
Aslanbek F. Tlupov ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Rheological Properties ◽  
Flow Rate ◽  
Relative Difference ◽  
Mechanical And Thermal Properties ◽  
Additivity Rule ◽  
Melt Flow ◽  
Melt Flow Rate

The study of the properties of PEEK blends with different melt flow rate (MFR) and carbon-filled composites based on them was carried out. It was found that with an increase in the relative difference in the MFR of the blended PEEKs, there is an increase in the deviation of the experimental MFR values from the additive ones. Up to a relative difference in the MFR of the components equal to 60%, the blends obey the additivity rule. It is shown that the achievement of a certain MFR value by blending polymers with different viscosities leads to the production of materials with similar properties. Carbon-filled composites based on PEEK blends also demonstrate very similar rheological, mechanical and thermal properties, which indicates the effectiveness of the method of blending PEEKs with different viscosities to achieve the required rheological properties.

Study on Rheological Properties of Polylactic Acid Retardant System

2014 ◽  
Vol 488-489 ◽  
pp. 293-296
Author(s):  
Dong Ze Li ◽  
Xiao Chuan Jia ◽  
Xiu Ping Lu ◽  
Sheng Jia Zhai
Keyword(s):  
Flame Retardant ◽  
Rheological Properties ◽  
Polylactic Acid ◽  
Flow Rate ◽  
Flame Retardants ◽  
Complex Viscosity ◽  
Intumescent Flame Retardant ◽  
Melt Flow ◽  
Melt Flow Rate ◽  
Scanning Frequency

A series of polylactic acid (PLA)/IFR composites was prepared by melt blending method.Capillary rheometer and rotary rheometer were applied to investigate the effects of and flame retardants on rheological properties. The results of the rheological test show that the melt flow rate increases with the increasing of content of Intumescent flame retardant. Intumescent flame retardant joined making PLA system flow rate is larger than pure PLA, melt flow rate increases, apparent viscosity decreases, relaxation time decreases, and the complex viscosity decreases gradually with the increase of scanning frequency.

scholarly journals Development of compositions from waste of polypropylene and polyethylene terephthalate and research of their technological and thermal properties

2021 ◽  
Vol 264 ◽  
pp. 05005
Author(s):  
Bahodir Mukhiddinov ◽  
Lola Tilavova ◽  
Shokhruh Juraev
Keyword(s):  
Thermal Properties ◽  
Melting Point ◽  
Heat Resistance ◽  
Polyethylene Terephthalate ◽  
Flow Rate ◽  
Thermal Characteristics ◽  
Solubility Parameters ◽  
Melt Flow ◽  
Melt Flow Rate ◽  
Temperature Decomposition

The article presents the results of determining the melting point and the melt flow rate, Vicat heat resistance of a composition made of polypropylene waste from the study of polyethylene terephthalate. It has been established that with an increase in the content of polyethylene terephthalate, the melting point and heat resistance according to Vicat increase, and the melt flow rate of the compositions decreases. The Hildebrand solubility parameters and the packing density of macromolecules are calculated using the increment method. The thermal characteristics of the compositions were investigated by the derivatography method. Their decomposition onset temperature, decomposition rate, and the amount of energy consumed for the decomposition of polymers and polymer compositions were determined. It was revealed that the compositions of polyethylene terephthalate with secondary polypropylene are more thermostable than compositions of polyethylene terephthalate with primary polypropylene.

scholarly journals Effect of thermal degradation on rheological properties of polymeric materials

2019 ◽  
Vol 299 ◽  
pp. 06001
Author(s):  
Jozef Dobránsky ◽  
Zigmund Doboš
Keyword(s):  
Shear Rate ◽  
Thermal Degradation ◽  
Rheological Properties ◽  
Flow Rate ◽  
Polymeric Materials ◽  
Volume Index ◽  
Melt Flow ◽  
Molding Machine ◽  
Molding Process ◽  
Melt Flow Rate

The aim of this paper is to monitor the melt volume index of thermoplastic materials and other rheological properties such as shear rate and viscosity. The aim is to compare and assess whether several times ground and subsequently re-melted samples of pure polymer granulate will have the same or similar rheology properties and whether adjustment of the injection molding machine will be required or willneed to reduce or increase production times. Thermo Scientific with HAAKE Meltflow MT software was used to determine the melt flow rate index (MVR) of thermoplastic materials. Based on the melt flow rate (MVR), shear rate and viscosity evaluation, it has been found that, although the selected materials have undergone multiple changes in the rheology of the polymeric materials, there is no problem in the molding process, and MVR does not change significantly. In this case, no changes in the settings of theinjection molding machines and reduction or increase in production times will be necessary. When re-melting the granulate samples, no excess waste was generated, which would then need to be disposed of and the samples could be re-used for further measurement after grinding.

Effect of Powder Properties such as Particle Size, Density and Melt Flow Rate on the Properties of Flame Sprayed PE Coating

2000 ◽  
Author(s):  
E. Rajamäki ◽  
M. Leino ◽  
P. Vuoristo ◽  
P. Järvelä ◽  
T. Mäntylä
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Flow Rate ◽  
Heating Temperature ◽  
Steel Substrate ◽  
Great Influence ◽  
Hot Water ◽  
Melt Flow ◽  
Melt Flow Rate ◽  
Powder Properties

Abstract Three different types of polyethylene powders were flame sprayed onto pre-heated steel substrate previously coated by electrostatic spray system with a thin epoxy primer layer. Properties of the polyethylene (PE) powders, including powder density, particle size and melt flow rate (MFR) were measured in order to study their influence on the mechanical properties of the coating. The spray experiments started with optimization of spraying parameters. The main variables were pre-heating temperature of the substrate, temperature increase during spraying (influenced by the spraying distance), and thickness of the PE coatings. The laboratory tests performed for the coatings were coating characterization by microscopy and mechanical testing. Porosity and thickness of the coatings were determined by optical and stereo microscopy studies from polished cross-sectional samples. Hardness, impact strength, peel strength, and adhesive strength of the coatings were also investigated. Also some hot water sinking and heat cycling tests were performed. As a result from the present studies it can be concluded that powder properties have great influence on the mechanical properties of the final coating.

Effect of Different Molecular Weight of PEG on the Crystallization Behaviors of Binary Polymer Blends PLA/TPS

2021 ◽  
Vol 1035 ◽  
pp. 918-924
Author(s):  
Teng Zhang ◽  
Su Mei Zheng
Keyword(s):  
Molecular Weight ◽  
Rheological Properties ◽  
Flow Rate ◽  
Crystallization Rate ◽  
Thermoplastic Starch ◽  
Extrusion Process ◽  
Poly Lactic Acid ◽  
Melt Flow Rate ◽  
Poly Ethylene ◽  
Different Molecular Weight

Serial poly (lactic acid) (PLA) and thermoplastic starch (TPS) blends (with a fixed content of 20 wt.% TPS) were prepared by melt extrusion process. The effect of different molecular weight of PEG on the thermal and rheological properties of PLA/TPS blends was studied by the melt flow rate (MFR) and DSC analysis. The results showed that the molecular weight of PEG influenced the miscibility and crystallization behavior of PLA/TPS blends. Blend added with PEG400 showed a single Tg, and blends with PEG600 provided remarkable improvement of rheological properties with an increase in flow rate to 49.02 g/10 min. 4% content of poly (ethylene glycol) (PEG) can positively contribute to improve crystallization rate of PLA by reducing the melting temperature and cold crystallization temperature.

scholarly journals Polyethylene-Matrix Composites with Halloysite Nanotubes with Enhanced Physical/Thermal Properties

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 787 ◽  
Author(s):  
Janusz W. Sikora ◽  
Ivan Gajdoš ◽  
Andrzej Puszka
Keyword(s):  
Impact Strength ◽  
Flow Rate ◽  
Softening Temperature ◽  
Halloysite Nanotubes ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Melt Flow ◽  
Polyethylene Matrix ◽  
Melt Flow Rate ◽  
Heat Deflection Temperature

The aim of the present work is to investigate the effect of halloysite nanotubes (HNT) on the mechanical properties of low-density polyethylene composites modified by maleic anhydride-grafted PE (PE-graft-MA). Polyethylene nanocomposites were prepared using an injection molding machine, Arburg Allrounder 320 C 500–170; the HNT content was varied at 0 wt %, 2 wt %, 4 wt % and 6 wt %, and the PE-graft-MA content was varied at 5 wt %. The composites were examined for their ultimate tensile stress, strain at ultimate stress, hardness, impact strength, melt flow rate, heat deflection temperature, Vicat softening temperature, crystallinity degree and phase transition temperature. It was found that the addition of halloysite nanotubes to low-density polyethylene (LDPE) led to an increased heat deflection temperature (HDT, up to 47 °C) and ultimate tensile strength (up to 16.00 MPa) while the Vicat softening temperature, strain at ultimate stress, impact strength and hardness of examined specimens slightly decreased. Processing properties of the materials specified by the melt flow rate (MFR) deteriorated almost twice. The results have demonstrated that the nanoparticles can reinforce enhance LDPE at low filler content without any considerable loss of its ductility, but only when halloysite nanotubes are superbly distributed in the polyethylene matrix.

Study of Mechanical Properties and Morphology of PA 6/PO Blends Compatibilized by PO Grafted with Itaconic Acid

e-Polymers ◽  
2007 ◽  
Vol 7 (1) ◽  
Author(s):  
Liu Xijun ◽  
Jiang Zhaohua ◽  
Zhu Wenming
Keyword(s):  
Mechanical Properties ◽  
Graft Copolymer ◽  
Flow Rate ◽  
Itaconic Acid ◽  
Polyamide 6 ◽  
Glass Temperature ◽  
Melt Flow ◽  
Melt Flow Rate ◽  
Twin Screw ◽  
The Impact

AbstractTwo different types of polyolefine (PO) grafted with itaconic acid as a reactive compatibilizer, polypropylene (PP) grafted with itaconic acid (PP-g-ITA) and high density polyethylene (HDPE) grafted with itaconic acid (HDPE-g-ITA), PP and HDPE grafted with copolymer of itaconic acid and styrene (PP-g-(ITA-St) and HDPE-g-(ITA-St)) were prepared by melt graft technique through reactive type twin-screw extruder. FT-IR and thermal analysis were used to characterize the structure of the graft copolymer. The graft ratio (GR) and melt flow rate (MFR) were determined by non-aqueous titration and melt flow rate analyzer. The effect of the concentration of monomer and initiator dosage on GR and MFR of graft copolymer were studied. Then polyamide 6 (PA 6) blends, PA 6/PP (PA 6/HDPE), that compatibilized with PP-g-ITA (HDPE-g-ITA) were prepared. The morphology of the blends was analyzed by SEM, DSC and Molau tests and the mechanical properties of which were characterized by tensile, impact, and bend tests. The results of mechanical property showed that the impact strength of blends was increased by 50% and 70% after PP-g-ITA and HDPE-g-ITA was used as compatibilizer, but the MFR of blends was decreased. The SEM photographs indicated that the accession of compatibilizer obviously improved binding state between two phases in blends, the size of dispersed phase was reduced evidently and the interface became indistinct. DSC results demonstrated that in the case of PP-g-ITA, glass temperature (Tg) of PA 6 matrix in blends was ascended, melt point (Tm) was improved a little, crystallinity (Xc) was decreased, Tm and Xc of PP phase was increased; With the accession of HDPE-g-ITA, Tm of PA 6 matrix and HDPE phase had almost no change, Xc of PA 6 matrix was decreased and Xc of HDPE phase was increased.

scholarly journals Optical measurement of high-temperature melt flow rate

2018 ◽  
Vol 57 (15) ◽  
pp. 4202 ◽  
Author(s):  
Benjamin Bizjan ◽  
Brane Širok ◽  
Jinpeng Chen
Keyword(s):  
High Temperature ◽  
Flow Rate ◽  
Optical Measurement ◽  
Melt Flow ◽  
Melt Flow Rate

Preparation and Property Study of PMMA/ASA Alloy

2011 ◽  
Vol 130-134 ◽  
pp. 2383-2387
Author(s):  
Guo Dong Tang ◽  
Si Chen ◽  
Yan Qin Shi ◽  
Xu Wang
Keyword(s):  
Flow Rate ◽  
Melt Blending ◽  
Dsc Analysis ◽  
Melt Flow ◽  
Scanning Calorimetry ◽  
Melt Flow Rate ◽  
Interface Phase ◽  
Blending Method ◽  
Method Effects ◽  
The Impact

Polymethyl methacrylate (PMMA)/ acrylonitrile-styrene-acrylate terpolymer (ASA) alloy was prepared via melt blending method. Effects of ASA melt flow rate and PMMA/ASA ratio on mechanical property of the alloy were studied. It showed that when the high melt flow rate ASA was used, alloy’s tensile strength and flexural strength were little different from using low melt flow rate ASA, while the impact strength was significantly higher than the latter. Differential scanning calorimetry (DSC) analysis showed that a glass transition (Tg) platform emerged in low melt flow rate ASA at 48.5°C, which represented the Tg of the interface phase formed between SAN grafted acrylate rubber particles and SAN matrix. Scanning electron microscope (SEM) experiment further showed that when low melt flow rate ASA was used, alloy’s cross section was smooth which showed the characteristics of brittle fracture.

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