Study of the distribution of rubber particles in ground tire rubber/polypropylene blends

Basso, Alberto; Zhang, Yang; Linnemann, Lars; Hansen, Hans Nørgaard

doi:10.1016/j.matpr.2020.05.362

Cited by 10 publications

(11 citation statements)

References 7 publications

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“…The hardness of all obtained PP/GTR compounds is about 20° ShD lower compared to the hardness of samples obtained by Elenien et al [ 35 ]. Additionally, the PP compound with 80 wt.% GTR content obtained by Basso had a higher hardness measured on the Shore D scale [ 29 ] compared to the PP/GTR80 obtained in the present study; this is probably from the use of homo-polypropylene by those researchers, which is characterized by higher hardness when used as the matrix of the compounds.…”

Section: Resultsmentioning

confidence: 46%

“…In recent years, the possibility of mass use of GTR as a filler for thermoplastic polymers [ 22 , 23 , 24 , 25 ], including polypropylene [ 26 , 27 , 28 ], has been observed. Basso [ 29 ] described the effect of GTR grain size on the selected functional properties (hardness and roughness) of homo-polypropylene compounds. Compounds samples with max.…”

Section: Introductionmentioning

confidence: 99%

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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: Resultsmentioning

confidence: 46%

Section: Introductionmentioning

confidence: 99%

Processing and Mechanical Properties of Highly Filled PP/GTR Compounds

et al. 2022

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“…Effective disposal of waste ground tire rubber (GTR) represents a significant and urgent issue all around the world for quite long time and it is striking a balance among economical, ecological and technical factors in the recycling process by having huge impact on the outcomes [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Blending of polymers and rubbers can be an alternative way to create new type of polymer materials and it plays an important role in the field of both polymer and rubber recycling as a possible solution [2,11]. However, most polymer pairs are immiscible that comes from their highly different viscoelastic properties, intermolecular interactions and surface tension [18,19].…”

Section: Introductionmentioning

confidence: 99%

“…Combination of a rubber/thermoplastic elastomer with a polymer is one of the most effective toughening modifications but significantly decreasing tensile strength, modulus and high-temperature creep deformation is expected with increasing content of the rubber material [8,20]. Particle size of GTR and its distribution play significant roles in creating a compound with appropriate properties and also determine GTR content in the thermoplastic matrix [2,3]. The average particle size is generally above 200 µm [2] with a GTR content of maximum 40%.…”

Section: Introductionmentioning

confidence: 99%

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A practical manner to GTR recycling in waste-HDPE/ABS

et al. 2022

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Waste high-density polyethylene (w-HDPE)/ acrylonitrile–butadiene–styrene (ABS)/ground tire rubber (GTR) have been melt blended by two-roll milling. Ternary blends of w-HDPE/ABS/GTR have been observed to be incompatible in the composition range studied which revealed in the deteriorated mechanical properties. Two main types of compatibilizers such as an experimental olefin-maleic anhydride copolymer based one synthesized by the authors and a commercial maleic anhydride grafted polypropylene (MA-g-PP) have been chosen for enhancing compatibility between the components ergo the mechanical properties. For characterizing tensile and impact properties of the blends mechanical tests have been carried out besides the scanning electron microscopy (SEM), X-ray diffraction and Fourier transform infrared spectroscopy. The most advantageous result in industrial practice can be that the experimental additive allows to apply higher GTR concentration ergo gives the opportunity to recycle higher level of GTR.

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