scholarly journals Remarkable Role of Experimental Olefin-Maleic-Anhydride Copolymer Based Compatibilizing Additives in Blends of Waste PET Bottles and Polyamide

2020 ◽  
Author(s):  
B. Nagy ◽  
C. S. Varga ◽  
K. Kontos ◽  
L. Simon-Stőger
Keyword(s):  
Mechanical Properties ◽  
Maleic Anhydride ◽  
Polymer Blends ◽  
Rheological Behaviour ◽  
Elongation At Break ◽  
Pet Bottles ◽  
Maleic Anhydride Copolymer ◽  
Waste Polymer ◽  
Outstanding Result ◽  
The Eu

Abstract Over the past 50 years demand for plastics drastically increased worldwide resulting in plastic wastes causing serious environmental problems. The main market sector of European plastics industry is the packaging industry most of which are polyolefins and poly(ethylene-terephtalate). In the EU, 29.1 million tonnes of plastic waste were collected in 2018, of which 32.5% was recycled, 42.6% was recovered for energy, and 24.9% was landfilled (Plastics-the Facts, 2019). Although landfilling of collected waste in the EU is steadily declining, there is still too much unused waste. Polymer blends based on waste resources can solve the issues of recycling. The main purpose of the research was to produce polymer blends from waste based PET that have appropriate mechanical properties and rheological behaviour as well in order to find application areas where product requirements are not strict. Blends containing waste based PET were extrusion moulded and calenderd producing extrusion strings and films. Rheological and tensile properties of three types of PET/engineering thermoplastic blends (PET/PC, PET/PA and PET/ABS) were studied. Miscibility of components of the blends is limited leading to weak mechanical properties such as low tensile strength and/or elongation at break. Due to that phenomenon compatibilizing additives are also required. As compatibilizing additives olefin-maleic-anhydride copolymer based additives have been used in our experiments. Structure of additives differed from each other both in ratio and length of carbon chains of compounds linked to maleic-anhydride groups. Blends have been studied with PET content ranging from 10 to 90%. As an outstanding result improving of mechanical properties was achieved, for example almost 40% growth was observed in elongation at break of extruded 80/20 PET/PA blends in the presence of 0.2% compatibilizing additive compared to the sample without additive, meanwhile its strength has also improved. Graphic Abstract

scholarly journals Structure and Properties of Polyoxymethylene/Silver/Maleic Anhydride-Grafted Polyolefin Elastomer Ternary Nanocomposites

Polymers ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 1954
Author(s):  
Yang Liu ◽  
Xun Zhang ◽  
Quanxin Gao ◽  
Hongliang Huang ◽  
Yongli Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Maleic Anhydride ◽  
Ag Nanoparticles ◽  
Decomposition Temperature ◽  
Melt Mixing ◽  
Elongation At Break ◽  
Maximum Value ◽  
Polyolefin Elastomer ◽  
Local Defects

In the present study, silver (Ag) nanoparticles and maleic anhydride-grafted polyolefin elastomer (MAH-g-POE) were used as enhancement additives to improve the performance of the polyoxymethylene (POM) homopolymer. Specifically, the POM/Ag/MAH-g-POE ternary nanocomposites with varying Ag nanoparticles and MAH-g-POE contents were prepared by a melt mixing method. The effects of the additives on the microstructure, thermal stability, crystallization behavior, mechanical properties, and dynamic mechanical thermal properties of the ternary nanocomposites were studied. It was found that the MAH-g-POE played a role in the bridging of the Ag nanoparticles and POM matrix and improved the interfacial adhesion between the Ag nanoparticles and POM matrix, owing to the good compatibility between Ag/MAH-g-POE and the POM matrix. Moreover, it was found that the combined addition of Ag nanoparticles and MAH-g-POE significantly enhanced the thermal stability, crystallization properties, and mechanical properties of the POM/Ag/MAH-g-POE ternary nanocomposites. When the Ag/MAH-g-POE content was 1 wt.%, the tensile strength reached the maximum value of 54.78 MPa. In addition, when the Ag/MAH-g-POE content increased to 15wt.%, the elongation at break reached the maximum value of 64.02%. However, when the Ag/MAH-g-POE content further increased to 20 wt.%, the elongation at break decreased again, which could be attributed to the aggregation of excessive Ag nanoparticles forming local defects in the POM/Ag/MAH-g-POE ternary nanocomposites. Furthermore, when the Ag/MAH-g-POE content was 20 wt.%, the maximum decomposition temperature of POM/Ag/MAH-g-POE ternary nanocomposites was 398.22 °C, which was 71.39 °C higher than that of pure POM. However, compared with POM, the storage modulus of POM/Ag/MAH-g-POE ternary nanocomposites decreased with the Ag/MAH-g-POE content, because the MAH-g-POE elastomer could reduce the rigidity of POM.

scholarly journals Sericin cocoon bio-compatibilizer for reactive blending of thermoplastic cassava starch

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Thanongsak Chaiyaso ◽  
Pornchai Rachtanapun ◽  
Nanthicha Thajai ◽  
Krittameth Kiattipornpithak ◽  
Pensak Jantrawut ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Maleic Anhydride ◽  
Crystal Size ◽  
Thermoplastic Starch ◽  
Cassava Starch ◽  
Chain Extension ◽  
Amino Groups ◽  
Reactive Blending ◽  
Elongation At Break ◽  
Small Crystal Size

AbstractCassava starch was blended with glycerol to prepare thermoplastic starch (TPS). Thermoplastic starch was premixed with sericin (TPSS) by solution mixing and then melt-blended with polyethylene grafted maleic anhydride (PEMAH). The effect of sericin on the mechanical properties, morphology, thermal properties, rheology, and reaction mechanism was investigated. The tensile strength and elongation at break of the TPSS10/PEMAH blend were improved to 12.2 MPa and 100.4%, respectively. The TPS/PEMAH morphology presented polyethylene grafted maleic anhydride particles (2 μm) dispersed in the thermoplastic starch matrix, which decreased in size to approximately 200 nm when 5% sericin was used. The melting temperature of polyethylene grafted maleic anhydride (121 °C) decreased to 111 °C because of the small crystal size of the polyethylene grafted maleic anhydride phase. The viscosity of TPS/PEMAH increased with increasing sericin content because of the chain extension. Fourier-transform infrared spectroscopy confirmed the reaction between the amino groups of sericin and the maleic anhydride groups of polyethylene grafted maleic anhydride. This reaction reduced the interfacial tension between thermoplastic starch and polyethylene grafted maleic anhydride, which improved the compatibility, mechanical properties, and morphology of the blend.

Mechanical Properties of Herbal Patches from Chitosan-Based Polymer Blends for Medical Applications

2018 ◽  
Vol 917 ◽  
pp. 52-56
Author(s):  
Jirapornchai Suksaeree
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Polymer Blends ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Hydroxypropyl Methylcellulose ◽  
Peel Strength ◽  
Elongation At Break ◽  
Zingiber Cassumunar

Recently, Thai herbs are widely used as medicine to treat some illnesses. Zingiber cassumunar Roxb., known by the Thai name “Plai”, is a popular anti-inflammatory, antispasmodic herbal body and muscle treatment. This research aimed to prepare herbal patches that incorporated the 3 g of crude Z. cassumunar oil. The herbal patches made from different polymer blends were 2 g of 3.5%w/v chitosan and 5 g of 20%w/v hydroxypropyl methylcellulose (HPMC), or 2 g of 3.5%w/v chitosan and 5 g of 20%w/v polyvinyl alcohol (PVA) using 2 g of glycerin as a plasticizer. They were prepared by mixing all ingredients in a beaker and produced by solvent casting method in hot air oven at 70±2oC. The completed herbal patches were evaluated for their mechanical properties including Young’s modulus, ultimate tensile strength, elongation at break, T-peel strength, and tack adhesion. The thickness of blank and herbal patches was 0.263-0.282 mm and 0.269-0.275 mm, respectively. Young’s modulus, ultimate tensile strength, elongation at break, T-peel strength, and tack adhesion were 104.73-142.71 MPa, 87.92-93.28 MPa, 154.39-174.98 %, 3.43-4.88 MPa, and 5.29-7.02 MPa, respectively, for blank patches, and 116.83-147.28 MPa, 89.49-100.47 MPa, 133.78-159.27 %, 2.01-3.98 MPa, and 4.03-5.19 MPa, respectively, for herbal patches. We prepared herbal blended patches made from chitosan/PVA or chitosan/HPMC polymer matrix blends incorporating the crude Z. cassumunar oil. They had good mechanical properties that might be developed for herbal medicinal application.

Mechanical and Morphological Behavior of Blends Obtained from Biopolymers (PLA/PLC)

2014 ◽  
Vol 775-776 ◽  
pp. 24-28
Author(s):  
Taciana Regina de Gouveia Silva ◽  
Bartira Brandão da Cunha ◽  
Pankaj Agrawal ◽  
Edcleide Maria Araújo ◽  
Tomás Jefférson Alves de Mélo
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Lactic Acid ◽  
Elastic Modulus ◽  
Impact Strength ◽  
Polymer Blends ◽  
Poly Lactic Acid ◽  
Elongation At Break ◽  
Morphology Analysis ◽  
Morphological Behavior

In this work, the effect of the PCL content and E-GMA compatibilizer on the mechanical properties and morphology of poly (lactic acid) - PLA/ poly (ε-caprolactone)-PCL blends was investigated. The results of the mechanical properties showed that there was a reduction in the elastic modulus and tensile strength when PCL was added to PLA. The decrease in the modulus was more pronounced when the PCL content was increased from 10 to 20% (wt). The PLA/PCL/E-GMA blend showed the lower modulus and tensile strength. This blend also presented the higher elongation at break and impact strength. The morphology analysis by SEM showed that the PLA/PCL blends where characterized by lack of adhesion between the PLA and PCL phases. The presence of E-GMA in the PLA/PCL/E-GMA blend improved the adhesion between the PLA and PCL phases.Keywords: poly (latic acid); poly (ε-caprolactone); polymer blends; compatibilizer

scholarly journals Sericin cocoon bio-compatibilizer for reactive blending of thermoplastic cassava starch

2021 ◽  
Author(s):  
Thanongsak Chaiyaso ◽  
Pornchai Rachtanapun ◽  
Nanthicha Thajai ◽  
Krittameth kiattipronpithak ◽  
Pensak Jantrawut ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Maleic Anhydride ◽  
Crystal Size ◽  
Thermoplastic Starch ◽  
Cassava Starch ◽  
Chain Extension ◽  
Amino Groups ◽  
Reactive Blending ◽  
Elongation At Break ◽  
Small Crystal Size

Abstract Cassava starch was blended with glycerol to prepare thermoplastic starch (TPS). TPS was premixed with sericin (TPSS) by solution mixing and then melt-blended with polyethylene grafted maleic anhydride (PEMAH). The effect of sericin on the mechanical properties, morphology, thermal properties, rheology, and reaction mechanism was investigated. The tensile strength and elongation at break of the TPSS10/PEMAH blend were improved to 12.2 MPa and 100.4%, respectively. The TPS/PEMAH morphology presented PEMAH particles (2 µm) dispersed in the TPS matrix, which decreased in size to approximately 200 nm when 5% sericin was used. The melting temperature of PEMAH (121°C) decreased to 111°C because of the small crystal size of the PEMAH phase. The viscosity of TPS/PEMAH increased with increasing sericin content because of the chain extension. Fourier-transform infrared spectroscopy (FTIR) confirmed the reaction between the amino groups of sericin and the maleic anhydride groups of PEMAH. This reaction reduced the interfacial tension between TPS and PEMAH, which improved the compatibility, mechanical properties, and morphology of the blend.

Effect of Tetradecyl Methyl Acrylate-Maleic Anhydride Copolymer on the Mechanical Properties of Glass Mat Reinforced Polypropylene Composites

2005 ◽  
Vol 13 (4) ◽  
pp. 403-413
Author(s):  
Shanhua Zhou ◽  
Zhiyu Xu ◽  
Xin Liu ◽  
Yan Gao ◽  
Qingzhi Dong
Keyword(s):  
Mechanical Properties ◽  
Maleic Anhydride ◽  
Impact Strength ◽  
Flexural Strength ◽  
Polypropylene Composites ◽  
Monomer Ratio ◽  
Maleic Anhydride Copolymer ◽  
Glass Mat ◽  
The Impact ◽  
Interfacial Modifier

A new interfacial modifier made of tetradecyl methylacrylate-maleic anhydride copolymer (TMA- co-MAH) was prepared and characterized. The effect of reaction time and monomer ratio on the gross conversion and MAH content in the copolymer was studied. When the glass mat was treated with TMA- co-MAH solutions and compounded with PP, the MAH group of the interfacial modifier formed strong interactions with the glass mat and the long side chain of the interfacial modifier entangled firmly with the polypropylene matrix. In comparison with maleated polyolefins, the higher MAH content of the TMA- co-MAH resulted in better interfacial adhesion between the PP and the glass mat resulting in increased flexural strength and modulus, and the ductility of the TMA- co-MAH introduced a ductile interlayer into the interface of the glass mat reinforced polypropylene composites (GMT-PPs) to achieve higher impact strength. Therefore the mechanical properties of composites treated with TMA- co-MAH were all superior to those of GMT-PPs treated with maleic anhydride grafted polypropylene (PP- g-MAH) solutions when they were used at the same level. The effects of anhydride content, concentration of copolymer and compounding time on the mechanical property of GMT-PPs were investigated. With the optimal monomer ratio, MAH:TMA = 7:3, a 3% copolymer solution and a compounding time of 5 min, the impact strength, flexural strength and modulus of GMT-PPs treated with the new interfacial modifier were all improved significantly compared with composites treated with 0.3% PP- g-MAH solution.

scholarly journals Studies On Compatibilization Of Recycled Polyethylene/Thermoplastic Starch Blends By Using Different Compatibilizer

2019 ◽  
Vol 17 (1) ◽  
pp. 557-563 ◽  
Author(s):  
Barıs Oner ◽  
Tolga Gokkurt ◽  
Ayse Aytac
Keyword(s):  
Maleic Anhydride ◽  
Thermoplastic Starch ◽  
Sem Analysis ◽  
Screw Extruder ◽  
Elongation At Break ◽  
Recycled Polyethylene ◽  
Twin Screw ◽  
Starch Blends ◽  
Packaging Industry ◽  
Maleic Anhydride Copolymer

AbstractIn this study, the aim was to examine the effects of three different compatibilizers on the recycled polyethylene/ thermoplastic starch (r-LDPE/TPS) blends which are used in producing garbage bags. Polyethylene-Grafted-Maleic Anhydride (PEgMAH), maleic-anhydride modified ethylene propylene rubber (EPMgMAH) and ethylene maleic anhydride copolymer (PEMAH) were selected as the compatibilizers. r-LDPE/TPS blends with or without compatibilizer were prepared by using a twin screw extruder and characterized by means of mechanical, thermal, structural and morphological analyses. It was found that tensile strength values increased with the addition of PEgMAH but decreased with the addition of EPMgMAH. Elongations at break values of the r-LDPE/TPS blends were significantly improved by using PEgMAH and EPMgMAH. Tm and Tc values have slightly affected by the compatibilizer usage in the DSC analysis. In addition, the better interfacial interaction was observed for the compatibilized blend with the PEgMAH and EPMgMAH during the SEM analysis. It was concluded that PEgMAH and EPMgMAH showed mainly changed results in elongation at break values and this is the important parameter in the packaging industry.

scholarly journals Effects of Compatibilization on Mechanical Properties of Pineapple Leaf Powder Filled High Density Polyethylene

2017 ◽  
Vol 10 ◽  
pp. 22-28
Author(s):  
Innocent Ochiagha Eze ◽  
Isaac O. Igwe ◽  
Okoro Ogbobe ◽  
Henry C. Obasi ◽  
U. Luvia Ezeamaku ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Maleic Anhydride ◽  
High Density Polyethylene ◽  
Filler Content ◽  
Tensile Modulus ◽  
Fibre Surface ◽  
Mechanical Tests ◽  
High Density ◽  
Elongation At Break ◽  
Leaf Powder

The effects of compatibilizer (maleic anhydride-graft-polyethylene) on the mechanical properties of pineapple leaf powder (PALP) filled high density polyethylene (HDPE) composites were studied. HDPE and PALP composites in the presence, or absence of the compatibilizer, maleic anhydride -graft- polyethylene (MA-g-PE) were prepared by injection moulding technique. The filler (PALP) contents investigated were 2, 4, 6, 8, and 10 wt%, while the MA-g-PE content was 3 wt% of the filler content for each formulation. The result of the mechanical tests carried out on the HDPE/PALP composites showed that the tensile strength, tensile modulus, abrasion resistance, and hardness of the composites increased as the filler content increases both in the presence, or absence of the compatibilizer (MA-g-PE) for all the filler contents investigated, while the elongation at break (EB) for PALP/HDPE composites was found to decrease as the filler content increases both in the presence, or absence of MA-g-PE for all the filler contents investigated. It was also observed that PALP/HDPE composites in the presence of MA-g-PE exhibited better mechanical properties than that of PALP/HDPE composites in the absence of MA-g-PE for all the filler contents investigated. The present study has proved that the mechanical properties of PALP/HDPE composites can be enhanced by incorporating a compatibilizer (MA-g-PE) into their formulations. This is so because the chemical composition of the compatibilizer (MA-g-PE) allows it to react with the fibre surface, thereby forming a bridge of chemical bonds between the fibre and matrix.

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