The effect of different mixing methods on morphology and mechanical properties of PP/EPDM/talc blend

2021 ◽  
pp. 096739112110128
Author(s):  
Hamid Yazdani ◽  
Nayereh Sadat Mousavi
Keyword(s):  
Mechanical Properties ◽  
Impact Resistance ◽  
Ethylene Propylene Diene Monomer ◽  
Screw Extruder ◽  
Twin Screw ◽  
Low Modulus ◽  
Maximum Service Temperature ◽  
Morphological Behavior ◽  
Internal Mixer ◽  
Morphology And Mechanical Properties

To overcome the low modulus and low maximum service temperature of polypropylene (PP) and ethylene-propylene-diene monomer (EPDM) blends, incorporation of talc into blend have been considered. In this study, the effect of various mixing methods of morphological behavior and mechanical properties of PP/EPDM/talc compound were investigated. Samples were prepared by different methods in internal mixer and co-rotating twin-screw extruder. It was found, the tensile properties were not affected by applying different mixing methods.The highest impact resistance was related to sample which had pre-blending on two roll mills and finally mixed in the internal mixer. Scanning electron microscopy (SEM) micrographs showed that the rubber dispersed morphology for all samples and the finest morphology was related to sample with the highest impact resistance. Because of pre-blending of EPDM/talc on two roll mills, this sample showed the best dispersion and distribution of talc.

Rheology, Morphology and Mechanical Properties of PA6/PP-g-MAH/POE Blends

2011 ◽  
Vol 366 ◽  
pp. 310-313
Author(s):  
Ming Tao Run ◽  
Meng Yao ◽  
Bing Tao Xing ◽  
Wen Zhou
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Screw Extruder ◽  
Reinforcing Agent ◽  
Twin Screw ◽  
Impact Tester ◽  
The Impact ◽  
Plastic Fluids ◽  
Morphology And Mechanical Properties ◽  
Toughening Agent

The rheology, morphology and mechanical properties of the PA6/PP-g-MAH/POE blends prepared by twin-screw extruder were studied by rheometer, scanning electron microscopy, universal tester and impact tester, respectively. The results suggest that the impact strength is improved by the POE acting as a toughening agent, while the compatibility of PA6 and POE is improved by the compatibilizer of PP-g-MAH. Furthermore, the PP-g-MAH component also acts as a reinforcing agent for decreasing the strength depression induced by the POE component. When POE content is about 9 wt% and PP-g-MAH content is about 10% in blends, the blend has the maximum tensile strength and impact strength. All melts of PA6/PP-g-MAH/POE blends are pseudo-plastic fluids. Both the POE and PP-g-MAH components can increase the apparent viscosity of the melt due to their facility of the linear molecular.

Reactive Blends of Poly(butylene adipate-co-terephthalate) and Thermoplastic Starch

2012 ◽  
Vol 488-489 ◽  
pp. 57-61
Author(s):  
Vorawan Arunyagasemsuke ◽  
Supakij Suttiruengwong ◽  
Manus Seadan
Keyword(s):  
Mechanical Properties ◽  
Weight Ratio ◽  
Cost Effective ◽  
Thermoplastic Starch ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Twin Screw ◽  
Reactive Blend ◽  
The Cost ◽  
Internal Mixer

The blend of poly(butylene adipate-co-terephthalate) (PBAT) and thermoplastic starch (TPS) are a promising way to get a new class of bio-compostible plastic, balance the cost effective issue and good mechanical properties. Blends of both polymers are immiscible in nature. Therefore, to make the blend to be more compatible, some block-copolymer compatibilizer can be introduced. Reactive blend is one of effective ways to create such compatibilization at the interface. The objective of this work was to study the reactive blends of PBAT/TPS in comparison to the physical blend. The reactive blends were prepared in both an internal mixer and a twin-screw extruder. For reactive blends in twin-screw extruder, PBAT, starch, glycerol and reactive agent were all pre-mixed and blended in an extruder on one step process. The weight ratio of PBAT:TPS (starch + glycerol) was fixed at 60:40. The reactive agent maleic anhydride (MA) and peroxide (Luperox® 101) were used at very low level 0-0.1 phr. The mechanical properties, morphology and flows property of blends were characterized using tensile machine, scanning electron microscope (SEM) and melt flow indexer (MFI). The internal mixer torque showed a decrease in a final torque value of TPS when MA being added, confirming the chain scsision reaction of TPS. The finer morphogy and better mechanical properties were obtained in the reactive blend with 0.1 phr of MA and 0.1 phr of peroxide.

Study of morphology and mechanical properties of PP/EPDM/clay nanocomposites prepared using twin‐screw extruder and friction stir process

2018 ◽  
Vol 40 (8) ◽  
pp. 3306-3314 ◽  
Author(s):  
Mohammad Reza Nakhaei ◽  
Amir Mostafapour ◽  
Charles Dubois ◽  
Ghasem Naderi ◽  
Mir Hamid Reza Ghoreishy
Keyword(s):  
Mechanical Properties ◽  
Clay Nanocomposites ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Friction Stir Process ◽  
Friction Stir ◽  
Twin Screw ◽  
Morphology And Mechanical Properties

Ultrasonically Treated Polypropylene/Ground Tire Rubber Blends

2002 ◽  
Vol 75 (4) ◽  
pp. 617-625 ◽  
Author(s):  
Jeong Seok Oh ◽  
A. I. Isayev
Keyword(s):  
Mechanical Properties ◽  
Treatment Process ◽  
Low Cost ◽  
Screw Extruder ◽  
Tire Rubber ◽  
Ground Tire Rubber ◽  
Rubber Blends ◽  
Twin Screw ◽  
Internal Mixer ◽  
Slit Die

Abstract Compounding ground tire rubber (GRT) with commercial polyolefins such as polypropylene (PP) is a possible way of recycling GRT. These new blends can provide low cost materials. The present study describes new materials which are obtained by the ultrasonically treated PP/GRT blends. In order to improve the efficiency of the treatment process, a new ultrasonic reactor was built. In this reactor, two horns were placed in a slit die which is attached to a plastic extruder. PP/GRT blends mixed by using a twin screw extruder were passed through the reactor to devulcanize GRT. Then the blends were dynamically revulcanized using an internal mixer. Mechanical properties, rheology and morphology of the obtained blends were studied. Under optimal conditions of ultrasonic treatment, the mechanical properties of the blends were improved in comparison with our earlier experiments.

The Effects of Melt Compounding Method on the Ambient and In Vitro Mechanical Properties of EVA/MMT Nanocomposites

2015 ◽  
Vol 789-790 ◽  
pp. 75-79 ◽  
Author(s):  
Azlin Fazlina Osman ◽  
Tew Wei Hong ◽  
Abdulkader M. Alakrach
Keyword(s):  
Mechanical Properties ◽  
Mechanical Performance ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Melt Compounding ◽  
Twin Screw ◽  
Internal Mixer ◽  
Nanofiller Content ◽  
Eva Copolymer

The in vitro biostability of ethyl vinyl acetate (EVA) nanocomposite incorporating the organically modified montmorillonite (organo-MMT) was investgated as a new material for biomedical applications. The effects of compounding process and filler loadings on the ambient and in vitro (exposed in oxidizing condition, 37°C) mechanical properties were studied. We have observed that, the melt compounded EVA copolymer by internal mixer (Brabender plasticoder) achieved the highest ambient and in vitro mechanical properties at low nanofiller content (1wt% organo-MMT). In contrast, the melt compounded EVA copolymer by twin screw extruder achieved the highest ambient and in vitro mechanical properties at high nanofiller content (5wt% organo-MMT). We suggest that this was due to the capability of the twin screw extruder to provide greater shear force for the exfoliation and dispersion of the high content organo-MMT as compared to internal mixer (Brabender plasticoder). However, compounding by twin screw extruder caused more severe reduction in tensile toughness of the EVA containing 5 wt% organo-MMT, after this material was exposed to oxidative agent, 37°C. These studies show that the melt compounding method may bring significant effect to both the ambient and in vitro mechanical performance of the EVA nanocomposites, and hence further investigation towards optimization should be pursued.

scholarly journals Effects of a Twin-Screw Extruder Equipped with a Molten Resin Reservoir on the Mechanical Properties and Microstructure of Recycled Waste Plastic Polyethylene Pellet Moldings

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1058
Author(s):  
Hikaru Okubo ◽  
Haruka Kaneyasu ◽  
Tetsuya Kimura ◽  
Patchiya Phanthong ◽  
Shigeru Yao
Keyword(s):  
Mechanical Properties ◽  
Mechanical Performance ◽  
Value Added ◽  
Industrial Applications ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Polymer Properties ◽  
Wide Range ◽  
Twin Screw ◽  
Recycled Plastics

Each year, increasing amounts of plastic waste are generated, causing environmental pollution and resource loss. Recycling is a solution, but recycled plastics often have inferior mechanical properties to virgin plastics. However, studies have shown that holding polymers in the melt state before extrusion can restore the mechanical properties; thus, we propose a twin-screw extruder with a molten resin reservoir (MSR), a cavity between the screw zone and twin-screw extruder discharge, which retains molten polymer after mixing in the twin-screw zone, thus influencing the polymer properties. Re-extruded recycled polyethylene (RPE) pellets were produced, and the tensile properties and microstructure of virgin polyethylene (PE), unextruded RPE, and re-extruded RPE moldings prepared with and without the MSR were evaluated. Crucially, the elongation at break of the MSR-extruded RPE molding was seven times higher than that of the original RPE molding, and the Young’s modulus of the MSR-extruded RPE molding was comparable to that of the virgin PE molding. Both the MSR-extruded RPE and virgin PE moldings contained similar striped lamellae. Thus, MSR re-extrusion improved the mechanical performance of recycled polymers by optimizing the microstructure. The use of MSRs will facilitate the reuse of waste plastics as value-added materials having a wide range of industrial applications.

Response of Modified Poly(lactic acid) to Microwave Radiation

2012 ◽  
Vol 488-489 ◽  
pp. 1393-1397
Author(s):  
Buranin Saengiet ◽  
Wasin Koosomsuan ◽  
Phassakarn Paungprasert ◽  
Rattikarn Khankrua ◽  
Sumonman Naimlang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Microwave Radiation ◽  
Food Packaging ◽  
Impact Resistance ◽  
Poly Lactic Acid ◽  
Polypropylene Glycol ◽  
Heat Accumulation ◽  
The One ◽  
Internal Mixer

The frozen instant food packaging is the one of disposal product, which produced from petroleum–based plastic and has been accumulated worldwide pressuring on the environment. Therefore, the biodegradable plastics have become key candidates in this application. Poly(lactic acid) (PLA) was regarded as one of the most promising biodegradable polymer due to its good mechanical properties. The aim of this work was to study on the freezability and microwavability of PLA through crosslink reaction. For the improvement of the processibility of PLA, hyperbranched polymer (HBP) and polypropylene glycol (PPG) were used as plasticizer. Then the crosslinking of PLA was introduced by addition of peroxide (Luperox101) and triallyl isocyanurate (TAIC) in an internal mixer. Neat and modified PLA samples were characterized and testing for mechanical properties. From the gel content results, it was showed the increased value with the increased content of TAIC due to the denser crosslinked structure of polymer. This result was confirmed by FT-IR spectra. All modified PLA samples showed the higher %strain at break than neat PLA. In addition, impact resistance in frozen state showed the results of modified PLA with 0.1wt% of peroxide and 0.15 wt% of TAIC, was higher than neat PLA. Moreover, this composition also showed the highest microwave response and heat accumulation was suppressed when the specimen was immersed in the water during the test. From the results obtained in this work, the further investigation is needed to pursue and elucidate the relationship between the polymer structure and heat absorption when materials undergo the microwave radiation.

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