Physical Properties of PP/Recycled PET Blends Prepared by Pulverization Technique

2012 ◽  
Vol 488-489 ◽  
pp. 109-113
Author(s):  
Pranut Potiyaraj ◽  
Supachok Tanpichai ◽  
Prompoom Phanwiroj
Keyword(s):  
Physical Properties ◽  
Soft Drink ◽  
Melt Flow Index ◽  
Lower Amount ◽  
Flow Index ◽  
Polymer Mixtures ◽  
Recycled Pet ◽  
Pet Bottles ◽  
Polyethylene Wax ◽  
Processing Techniques

Polymer blends between pristine polypropylene (PP) and post-consumer soft-drink PET bottles (rPET) were prepared using pulverization technique. The polymer mixtures were pulverized, at the amounts of rPET in PP of 0, 10, 15, 20 and 30 phr (parts per hundred of resin) by weight, into powder. In an extruder, the polymer powders were mixed with maleic anhydride-grafted polypropylene (MAPP) and polyethylene wax (PE wax) as a compatibilizer and a processing aid, respectively. The extrudates were prepared into test specimens by injection molding. Physical properties of PP/rPET blends were subsequently investigated. The results pointed out that, for the pulverized blends without compatibilizer, tensile and flexural strength were improved at the lower amount of rPET. The compatibilizing effect of MAPP was exhibited at the higher amount of rPET. The reduction of melt flow index (MFI) may cause difficulties for some processing techniques which required polymers with high MFI. The addition of PE wax successfully brought up the MFI as well as elongation at break while other mechanical properties decreased.

Cable and Wire Application: Adoption of Nanomagnesium Hydroxide Blended with LDPE/EVA for Mechanical and Physical Properties

2013 ◽  
Vol 701 ◽  
pp. 202-206
Author(s):  
Ahmad Aroziki Abdul Aziz ◽  
Sakinah Mohd Alauddin ◽  
Ruzitah Mohd Salleh ◽  
Mohammed Iqbal Shueb
Keyword(s):  
Mechanical Properties ◽  
Physical Properties ◽  
Melt Flow Index ◽  
Low Density Polyethylene ◽  
Flow Index ◽  
Low Density ◽  
Elongation At Break ◽  
Mechanical And Physical Properties ◽  
Poly Ethylene ◽  
Loading Amount

Effect of nanoMagnesium Hydroxide (MH) nloading amount to the mechanical and physical properties of Low Density Polyethylene (LDPE)/ Poly (ethylene-co vinyl acetate)(EVA) nanocomposite has been described and investigated in this paper. The tensile strength results show that increased amount of nanofiller will decrease and deteriorate the mechanical properties. The elongation at break decreased continuously with increasing loading of nanofiller. Generally, mechanical properties become poorer as loading amount increase. Melt Flow Index values for physical properties also provide same trend as mechanical properties results. Increase filler amount reduced MFI values whereby increased resistance to the flow.

scholarly journals Melt Rheology of Renewable Polymers and of New Materials Based on them as Tool in Controlling the 3D/4D Printability

2021 ◽  
Vol 57 (4) ◽  
pp. 77-87
Author(s):  
Doina Dimonie ◽  
Nicoleta Dragomir
Keyword(s):  
Molecular Weight ◽  
Melt Flow Index ◽  
Melt Processing ◽  
Operating Conditions ◽  
Flow Index ◽  
Flow Conditions ◽  
Index Method ◽  
Pre Treatment ◽  
Processing Techniques ◽  
Selection Of

The article presents results regarding the use of the melt flow index method (MFIM) in estimating the rheological properties of polylactic acid (PLA) and PLA-based materials, as tool in the selection of the operating conditions at their shaping into filaments and for 3D printing with thus obtained filaments. Based on the MFIM, the molecular weight of various PLA grade commonly used in melt processing techniques, including printing, were qualitatively compared. It was found that PLA for printing has the lowest molecular weight as compared with the PLA melt processed through injection, extrusion, thermoforming. It has been also shown that the MFIM can be used to verify the efficiency of drying, pre-treatment always needed to be done, before filaments obtaining and/or printing, especially in case of renewable polyesters. By simulating the printing at the indexer, via depositing successive layers, one over the other, it was possible to estimate the optimal flow conditions that ensure a good adhesion between the deposited layers. The estimation of the condition which ensure the needed adhesion between the deposited layers with the help of the MFIM was verified with good results on a grade of high loaded PLA achieved according to an original formulation.

scholarly journals Comparative Study between R-Pet & Virgin Pet in Terms of Technical Aspect and Market Potential

2021 ◽  
Vol 9 (11) ◽  
pp. 1035-1040
Author(s):  
Dr. Sumanta Bhattacharya
Keyword(s):  
Comparative Study ◽  
Physical Properties ◽  
Unmet Need ◽  
Technical Aspect ◽  
Market Potential ◽  
Boiling Water ◽  
Chemical Extraction ◽  
Recycled Pet ◽  
Pet Bottles ◽  
Polyester Filament

Abstract: The crux of the new trend lies in sustainability and so follows the recyclable products. Polyester is of immense importance as a fibre when it comes to textile and garment, but the type used (Virgin PET) is not an eco-friendly one. Polyester filament extracted from the recycled PET bottles can cater to the unmet need of an eco-friendly substitute to the virgin polyester. A comparative study has been made to analyse whether recycled PET can perform the functionality of virgin PET. The physical properties of both stand out to be the same, signalling the use of recycled PET filament. Recycled PET filament finds it limitation in non-uniform dyeing but the same can be solved through chemical extraction. Keywords: Virgin PET, Recycled PET, Instron test, Boiling water shrinkage test, sustainable, market potential.

scholarly journals Physical Properties of Short Pineapple Leaf Fibre (PALF) Reinforced High Impact Polystyrene (HIPS) Composites

2009 ◽  
Vol 18 (1) ◽  
pp. 096369350901800 ◽  
Author(s):  
J. P. Siregar ◽  
S. M. Sapuan ◽  
Ab. Rahman ◽  
M. Zaki ◽  
H. M. D. Khairul Zaman
Keyword(s):  
Physical Properties ◽  
Water Absorption ◽  
Melt Flow Index ◽  
High Impact ◽  
Flow Index ◽  
Thickness Swelling ◽  
Compression Moulding ◽  
Melt Mixing ◽  
High Impact Polystyrene ◽  
Absorption Thickness

The aim of this study to investigate the physical properties of short pineapple leaf fibre (SPALF) reinforced high impact polystyrene (HIPS) composites. Three different sizes of the fibre were used in this study which was 10-40mesh, 40-60mesh and 60-80mesh. A five different fibre contents were used in this study which was 10%, 20%, 30%, 40%, and 50%. The fabricated SPALF/HIPS composites were used melt mixing and compression moulding. The physical properties of SPALF/HIPS composites such as water absorption, thickness swelling, melt flow index (MFI), and density board of composites were studied. The result showed that the addition of the SPALF was decreased the physical properties compare to pure HIPS (0% SPALF).

scholarly journals Thermal degradation of polyethylene film materials due to successive recycling

2006 ◽  
Vol 220 (8) ◽  
pp. 1099-1108 ◽  
Author(s):  
R Marsh ◽  
A J Griffiths ◽  
K P Williams ◽  
S L Evans
Keyword(s):  
Physical Properties ◽  
Polymeric Materials ◽  
Melt Flow Index ◽  
Reliable Data ◽  
Flow Index ◽  
Plastic Film ◽  
Mechanical Recycling ◽  
Plastic Materials ◽  
The Uk ◽  
Processing Properties

Mechanical recycling of plastic film involves subjecting plastic materials to a series of heat cycles that can potentially degrade the material, causing brittleness and increased melt viscosity. Plastic film recycling in the UK is in its infancy, in need of an increased understanding of how the physical properties of polymeric materials change before and during the process. Reliable data are required to estimate the behaviour of such film products when recycled. Measurements were made as to the changes in physical properties of four different varieties of polyethylene (PE) film products when subjected to a series of successive simulated heat cycles and evaluated after each step. Results showed that although changes in tensile properties were fairly small, changes in processing properties such as melt-flow index for highly branched or low-density PE are substantial and could be a concern during recycling operations.

Influence of MMT as reinforcement on rheological behavior, mechanical and morphological properties of recycled PET/ABS thermoplastic nanocomposites

2012 ◽  
Vol 32 (3) ◽  
Author(s):  
Mohd Zahidfullah Abd Razak ◽  
Agus Arsad ◽  
Abdul Razak Rahmat ◽  
Azman Hassan
Keyword(s):  
Shear Viscosity ◽  
Flexural Modulus ◽  
Tensile Modulus ◽  
Acrylonitrile Butadiene Styrene ◽  
Melt Flow Index ◽  
Morphological Properties ◽  
Flow Index ◽  
Maximum Point ◽  
Recycled Pet ◽  
Poly Ethylene

Abstract The objective of this research was to investigate the effect of incorporating nanofiller, montmorillonite (MMT) on mechanical, morphological and rheological properties of acrylonitrile-butadiene-styrene (ABS) and recycled poly(ethylene terephthalate) (rPET) nanocomposites. The MMT contents in 70:30 ABS/rPET and 30:70 ABS/rPET ranged from 1 to 5 wt%. The ABS/rPET nanocomposites were extruded and injection-molded into tensile, flexural and impact test samples. Samples underwent rheological testing by using melt flow index (MFI) and capillary rheometer and the morphology of the nanocomposites was investigated by using field emission scanning electron microscopy (FESEM). The maximum tensile strength and flexural strength were at 1 wt.% of MMT for both blends. However, tensile modulus and flexural modulus reached maximum point at 3 wt.% and started to decrease beyond 3 wt.%% of MMT. Impact strength for both blending decreased significantly with the incorporation of MMT. MFI values decreased with the increment of MMT for 30:70 ABS/rPET, but increased for 70:30 ABS/rPET. The incorporation of MMT increased the melt strength of 30:70 ABS/rPET nanocomposites. Shear viscosity showed increment with the increasing MMT concentration for 30:70 ABS/rPET nanocomposites. However, shear viscosity decreased with the increment of MMT for 70:30 ABS/rPET. FESEM micrographs show good distribution and dispersion of MMT in 30:70 ABS/rPET, but poor dispersion and agglomeration of MMT in 70:30 ABS/rPET.

scholarly journals Preparation, characterization, and evaluation of polymeric resin (BHMET) from the reaction of malic anhydride with recycled PET as a corrosion inhibitor for Csteel in HCl

2019 ◽  
Vol 7 (1) ◽  
pp. 1-11
Author(s):  
Yasir A ◽  
Khalaf A ◽  
Khalaf M
Keyword(s):  
Corrosion Inhibitor ◽  
Soft Drink ◽  
Ester Group ◽  
Material Surface ◽  
Chemical Recycling ◽  
Distilled Water ◽  
Recycled Pet ◽  
Pet Bottles ◽  
Catalyst Temperature ◽  
Corrosion Mechanisms

Introduction: The plastic soft drink bottle from polyethylene terephthalate (PET) was introduced to consumers in 1970s. Because PET have ester group its chemical recycling is preferred. To control and reducethe environmental pollution recycling and reusing of PET has turned into an imperative procedure from the ecological perspective and it has given business opportunity because of far reaching use and accessibilityof PET polymer. Also another source of pollution to the environment was the corrosion of materials. Corrosion is the deterioration and loss of a material and its critical properties due to chemical, electrochemical and other reactions of the exposed material surface with the surrounding environment. Understanding corrosion mechanisms allow to use corrosion-resistant materials and altering designs. Organic inhibitors are very efficient to protect the metals from corrosion in all chemicals (acidic, basic and salt) media. There were many types of corrosion inhibitors and the organic inhibitor are being applied widely to protect metals from corrosion in many aggressive media. The aim of this study is to utilize waste PET-bottles will be depolarized by 2,2-dithioethanol to produce (Bis(2-((2-hydroxyethyl) thio) ethyl) terephthalate (BHTE), then by reacting of (BHTE) with maleic anhydride to produce Bis (2-((6-Mono malic acid –hydroxyethyl ester) sulfanyl) ethyl terephthalate(BHMET). The prepared (BHMET) will be used as corrosion inhibitor andits efficiency to protect the carbon steel in acidic will be assessed. Materials and Methods: Depolymerization of PET waste done with 2,2-dithioethanol. The weight proportion of PET to 2,2-dithioethanol 1:8 (wt%) and zinc acetate (0.5 wt% based on PET) was added as catalyst. Temperature of the reaction mixture was between 160-180 oC for 12 h, then the reaction mixture was kept at 140 oC for 3 h, then allowed to cool to room temperature. With vigorous agitation distilled water in excess to the reaction mixture to allow the black liquid viscous compound oligomer of Bis(2-((2-hydroxyethyl) thio) ethyl terephthalate (BHET) to precipitate. In a three neck round bottom (250 ml) attached with mechanical stirrer and thermometer (5.7gm) of (BHET) compound was added and heated for (15 min.) at (60 OC). Then (2.5gm) of malic anhydride and (1%) sulfuric acid was added. By the mechanical stirrer the mixture was mixed for (50 min.) at temperature (80OC). After the reaction the mixture was washed with distilled water to avoid the acid residue. Scheme (1) shows the mechanism for the prepared (BHMET) corrosion inhibitor.

scholarly journals Number of Times Recycled and Its Effect on the Recyclability, Fluidity and Tensile Properties of Polypropylene Injection Molded Parts

2021 ◽  
Vol 13 (19) ◽  
pp. 11085
Author(s):  
Po-Wei Huang ◽  
Hsin-Shu Peng
Keyword(s):  
Physical Properties ◽  
Plastic Material ◽  
Viscosity Index ◽  
Crystallization Rate ◽  
Melt Flow Index ◽  
Flow Index ◽  
Repeated Injection ◽  
Cavity Pressure ◽  
Melt Flow ◽  
Injection Molded

The ease with which modern plastics can be injection molded makes them very suitable for the production of many different products and, today, plastics are often used as substitutes for metal. Polypropylene (PP) is one of the most widely used thermoplastics globally since it is very useful, cost-effective and flexible for molding. However, the amount of harm to the environment caused by plastic waste has become phenomenal and the recycling of plastics has become a serious aspect of environmental protection. PP, as the most commonly used plastic material, was selected for use in this study. It has a melt flow index of 15 g/min and its recyclability, fluidity, and physical properties, as well as manufacturing conditions, were explored in relation to the number of times the material could be recycled (TR). A cavity pressure sensor was used to measure the viscosity index of the recycled plastic after multiple cycles of plasticizing and injection, part molding, scrap-recycling, and crushing. A paperclip-shaped test specimen was used to determine PP fluidity and crystallinity of specimens with different TRs. Tensile tests were used to detect differences in the tensile strength between specimens made from Raw-PP and recycled PP. The results showed that PP that had been recycled several times had a higher melt flow index, material fluidity, melting peak area, crystallinity, crystallization rate, and crystallization temperature. Repeated injection and recycling of the material had reduced the length of the molecular chains and broadened the molecular weight distribution. This improved the fluidity and increased crystallinity. The increase in fluidity made cavity filling easier, reducing the cavity pressure as well as the viscosity index. The results of this study showed that the recycling of the PP could improve the physical properties of the products to a degree and also went some way to further the benefits of a circular economy. The recycling of injection-molded PP material can be added to renewable energy technologies and used in environmental impact assessment.

Rheological and Thermal Behavior of Recycled PET Modified by PMDA

2011 ◽  
Vol 391-392 ◽  
pp. 688-691 ◽  
Author(s):  
Ming Yi Wang ◽  
Zhi Qiang Guo ◽  
Bu Yu Lei ◽  
Nan Qiao Zhou
Keyword(s):  
Molecular Weight ◽  
Ethylene Terephthalate ◽  
Melt Flow Index ◽  
Thermal Characterization ◽  
Chain Extender ◽  
Flow Index ◽  
Recycled Pet ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
Fusion Index

In this work pyromellitic dianhydride (PMDA) was used as the chain extender to increase the molecular weight of the recycled poly(ethylene terephthalate) (R-PET) and improve the rheological properties of the R-PET. The reaction was performed in a Brabender torque rheometer. The rheological and thermal characterization were performed by means of a fusion index instrument and a differential scanning calorimeter (DSC ) to compare the effectiveness of the chain extending reaction of different percentages of PMDA. The experimental results showed that compared with the unmodified R-PET, the addition of PMDA decreased the melt flow index and increased the viscosity of the R-PET. In addition, increased crystallization temperatures ( ) were observed with the modified R-PET. It was also found that the modified R-PET with the concentration of 1.0wt% PMDA exhibited the lowest MFI.

scholarly journals Mechanical Optimization of Concrete with Recycled PET Fibres Based on a Statistical-Experimental Study

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 240
Author(s):  
Alejandro Meza ◽  
Pablo Pujadas ◽  
Laura Montserrat Meza ◽  
Francesc Pardo-Bosch ◽  
Rubén D. López-Carreño
Keyword(s):  
Reinforced Concrete ◽  
Aspect Ratio ◽  
Mechanical Performance ◽  
Tensile Tests ◽  
Superior Performance ◽  
Fibre Reinforced Concrete ◽  
Marine Fauna ◽  
Recycled Pet ◽  
Pet Bottles ◽  
Fibre Aspect Ratio

Discarded polyethylene terephthalate (PET) bottles have damaged our ecosystem. Problems of marine fauna conservation and land fertility have been related to the disposal of these materials. Recycled fibre is an opportunity to reduce the levels of waste in the world and increase the mechanical performance of the concrete. PET as concrete reinforcement has demonstrated ductility and post-cracking strength. However, its performance could be optimized. This study considers a statistical-experimental analysis to evaluate recycled PET fibre reinforced concrete with various fibre dose and aspect ratio. 120 samples were experimented under workability, compressive, flexural, and splitting tensile tests. The results pointed out that the fibre dose has more influence on the responses than its fibre aspect ratio, with statistical relation on the tensional toughness, equivalent flexural strength ratio, volumetric weight, and the number of fibres. Moreover, the fibre aspect ratio has a statistical impact on the tensional toughness. In general, the data indicates that the optimal recycled PET fibre reinforced concrete generates a superior performance than control samples, with an improvement similar to those reinforced with virgin fibres.

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