Mechanical and Morphological Properties of Polypropylene and Regenerated Tire-Rubber Blends

Silva, Luciana P. da; Rocha, Jairo S.; Pacheco, Elen Ba Vasques; Bouças, Thiago A. de O.; Furtado, Cristina R. G.

doi:10.1080/00914030701818306

Cited by 14 publications

(5 citation statements)

References 13 publications

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“…Due to the limited compatibility between rubber particles and the polymeric matrix, the adhesion at the interface between the components improved. Da Silva [ 34 ] assessed the effect of PP/GTR blend compatibility on the structure, thermal and mechanical properties of the obtained materials. Polypropylene functionalized with maleic anhydride (PP-g-MAH) in an amount of 5 wt.% was used as a modifier, increasing the impact strength of the tested materials.…”

Section: Introductionmentioning

confidence: 99%

Processing and Mechanical Properties of Highly Filled PP/GTR Compounds

et al. 2022

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Ground rubber from automobile tires is very difficult to recycle due to the cross-linking of the macromolecules and thus the lack of thermoplastic properties. The research consisted of assessing the processing possibility via the injection of highly filled PP/GTR compounds modified with 1.5 wt.% 2.5-dimethyl-2.5-di-(tert-butylperoxy)-hexane. GTR dosing ranged from 30 wt.% up to 90 wt.%. The evaluation of the processing properties of the obtained materials was carried out on the basis of the melt flow index test results and the signals recorded during processing by the injection molding by temperature and pressure sensors placed in the mold. The influence of the applied modifier on the changes in the mechanical properties of PP/GTR was determined with hardness, impact and static tensile tests. Moreover, thermal properties were obtained by the differential scanning calorimetry method. It has been found that it is possible to efficiently process compounds with high GTR content using injection molding. The presence of the filler allows to significantly reduce the cooling time in the injection mold and thus the time of the production cycle. It has been confirmed that 2.5-dimethyl-2.5-di-(tert-butylperoxy)-hexane modifies the rheological properties of PP and thus the PP/GTR composition. The lower viscosity of the matrix results in a more accurate bonding with the developed surface of the GTR grains, which results in better mechanical properties of the rubber-filled polypropylene.

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Section: Introductionmentioning

confidence: 99%

Processing and Mechanical Properties of Highly Filled PP/GTR Compounds

et al. 2022

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“…The crystallization temperature of iPP=nano-CaCO 3 increased compared with pure iPP [5,7] . Yang et al reported that nano-CaCO 3 particles had a better toughening effect on improving the impact strength of iPP matrix than micro-CaCO 3 particles [13] .…”

Section: Introductionmentioning

confidence: 92%

“…Therefore, the application range is somewhat limited because of its poor impact toughness, especially under room temperature. Therefore, the toughening and cost reduction of iPP has become one of the research focuses [1][2][3][4][5][6][7] .…”

Section: Introductionmentioning

confidence: 99%

Morphology, Crystallization and Dynamical Mechanical Behavior of iPP/Nano-CaCO₃Composites

Song

Tang

2012

Polymer-Plastics Technology and Engineering

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This article describes our study of crystallization behavior of nano-CaCO 3 -filled polypropylene under nonisothermal from the melt by differential scanning calorimetry (DSC). Morphology observation indicated with increasing CaCO 3 content the aggregates increased. Nano-CaCO 3 acted as nucleating site during nonisothermal crystallization in all iPP/nano-CaCO 3 composites. For nonisothermal crystallization kinetic studies, the result indicated that the Jeziorny and Ozawa approach cannot adequately describe the nonisothermal crystallization kinetic of iPP composite. In addition, Mo equation was employed to describe the nonisothermal crystallization kinetic process with satisfied results. Dynamic mechanical analysis indicated with increasing CaCO 3 content the glass transition decreased slightly.

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“…For ecological reasons, raw materials of natural origin are increasingly used as PP fillers. These include, among others, ground wood particles [1][2][3], natural fibers [4], and waste materials, e.g., sunflower husks [5], crushed egg shells [6], and ground rubber from car tires [7,8]. Our previous research [9] describes the mechanical properties of polypropylene composites with 10 and 20 wt% silica content.…”

Section: Introductionmentioning

confidence: 99%

Modification of Laser Marking Ability and Properties of Polypropylene Using Silica Waste as a Filler

2021

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Polypropylene (PP) belongs to the group of polymers characterized by low susceptibility to absorption of electromagnetic radiation in the infrared range (λ = 1064 nm). This research consisted of assessing the possibility of using silica waste from the metallurgic industry as an additive for PP laser marking. The modifier was introduced into the polymer matrix in the range from 1 to 10 wt%. The effects of laser radiation were assessed based on colorimetric tests and microscopic surface analysis. The mechanical properties of the composites were determined during the static tensile tests. The thermal properties were investigated via differential scanning calorimetry. It was found that the introduction of silica waste into polypropylene allows for the effective marking of sample surfaces with the use of a laser beam. The greatest contrast between the graphic symbol and the background was obtained for silica contents of 3 and 5 wt%, with the use of a low-speed laser head and a strong concentration of the laser beam. The application of silica caused an increase in the modulus of elasticity and the tensile strength of the composite samples. Increases in the crystallization temperature and the degree of crystallinity of the polymer matrix were also observed. It was found that silica waste can act as multifunctional additive for polypropylene.

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Mechanical and Morphological Properties of Polypropylene and Regenerated Tire-Rubber Blends

Cited by 14 publications

References 13 publications

Processing and Mechanical Properties of Highly Filled PP/GTR Compounds

Processing and Mechanical Properties of Highly Filled PP/GTR Compounds

Morphology, Crystallization and Dynamical Mechanical Behavior of iPP/Nano-CaCO₃Composites

Modification of Laser Marking Ability and Properties of Polypropylene Using Silica Waste as a Filler

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Mechanical and Morphological Properties of Polypropylene and Regenerated Tire-Rubber Blends

Cited by 14 publications

References 13 publications

Processing and Mechanical Properties of Highly Filled PP/GTR Compounds

Processing and Mechanical Properties of Highly Filled PP/GTR Compounds

Morphology, Crystallization and Dynamical Mechanical Behavior of iPP/Nano-CaCO3Composites

Modification of Laser Marking Ability and Properties of Polypropylene Using Silica Waste as a Filler

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Morphology, Crystallization and Dynamical Mechanical Behavior of iPP/Nano-CaCO₃Composites