Quantifying microstructural, thermal, mechanical and solid-state viscoelastic properties of polyolefin blend type thermoplastic elastomer compounds

Alanalp, Mine Begum; Durmuş, Ali

doi:10.1016/j.polymer.2018.03.054

Cited by 21 publications

(8 citation statements)

References 32 publications

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“…According to Parameswaranpillai et al [ 86 ], this effect can be attributed to the compatibility of ethylene–butadiene blocks in SEBS with the non-crystalline fraction of polyolefins facilitating interfacial diffusion of segments. Gradual increase in elongation at break of the polyolefin-based matrix was also noted by Alanalp and Durmus [ 87 ]. Based on their results, relatively low styrene content in the applied compatibilizer (29%) promoted its miscibility with the polyolefin chain enhancing the ductility of the material.…”

Section: Resultssupporting

confidence: 63%

Wastes from Agricultural Silage Film Recycling Line as a Potential Polymer Materials

et al. 2021

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The recycling of plastics is currently one of the most significant industrial challenges. Due to the enormous amounts of plastic wastes generated by various industry branches, it is essential to look for potential methods for their utilization. In the presented work, we investigated the recycling potential of wastes originated from the agricultural films recycling line. Their structure and properties were analyzed, and they were modified with 2.5 wt % of commercially available compatibilizers. The mechanical and thermal performance of modified wastes were evaluated by tensile tests, thermogravimetric analysis, and differential scanning calorimetry. It was found that incorporation of such a small amount of modifiers may overcome the drawbacks caused by the presence of impurities. The incorporation of maleic anhydride-grafted compounds enhanced the tensile strength of wastes by 13–25%. The use of more ductile compatibilizers—ethylene-vinyl acetate and paraffin increased the elongation at break by 55–64%. The presence of compatibilizers also reduced the stiffness of materials resulting from the presence of solid particles. It was particularly emphasized for styrene-ethylene-butadiene-styrene and ethylene-vinyl acetate copolymers, which caused up to a 20% drop of Young’s modulus. Such effects may facilitate the further applications of analyzed wastes, e.g., in polymer film production. Thermal performance was only slightly affected by compatibilization. It caused a slight reduction in polyethylene melting temperatures (up to 2.8 °C) and crystallinity degree (up to 16%). For more contaminated materials, the addition of compatibilizers caused a minor reduction in the decomposition onset (up to 6 °C). At the same time, for the waste after three washing cycles, thermal stability was improved. Moreover, depending on the desired properties and application, materials do not have to go through the whole recycling line, simplifying the process, reducing energy and water consumption. The presented results indicate that it is possible to efficiently use the materials, which do not have to undergo the whole recycling process. Despite the presence of impurities, they could be applied in the manufacturing of products which do not require exceptional mechanical performance.

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Section: Resultssupporting

confidence: 63%

Wastes from Agricultural Silage Film Recycling Line as a Potential Polymer Materials

et al. 2021

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“…Moreover, the degree of crystallinity values (X c %) of samples can becalculated from XRD results. The crystallinity (X c %) of the composites can be then calculated according to the following equation, 31

X_{C} % = \frac{A_{italiccry}}{A_{cry} + A_{amorphpus}}

in which A cry and A amorphpus represent the peak area of the crystalline peaks and the amorphous peaks, respectively. After peak fitting using JADE 6.0 software, the peak area of crystalline peaks and amorphous peaks, as well as crystallinity as shown in Table 2 can be determined.…”

Section: Resultsmentioning

confidence: 99%

Structure and performance of hydrogenated styrenic block copolymers/polypropylene/oil (HSBCs/PP/oil) composites

Liu

Xiong

et al. 2021

Polymers for Advanced Techs

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In the past few decades, considerable attention has been paid to the thermoplastic elastomer (TPE). Among them, hydrogenated styrenic block copolymers (HSBCs) have attracted extensive interest because of outstanding ozone resistance, remarkable aging properties, and environmental friendliness. Therefore, theoretical and experimental investigations on the HSBCs/PP/oil composites have been reported many times, but the influence of molecular structure on the structure and properties of composites has yet to be identified. In this study, three HSBCs with different molecular structures were used as the research object to systematically study the effects of their molecular structural differences on the aggregate structure, microstructural, mechanical, and thermal properties of HSBCs/PP/oil composites. It was found thatthe content of side groups in the molecular chain was the main factor affecting the structure and performance of the HSBCs/PP/oil composites. This research can provide theoretical guidance for the molecular design and structural control of the new HSBC, so it has obvious theoretical significance and practical value.

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“…The unique significant difference in terms of damping behavior was observed when comparing neat TPE with TPE10WB. From a qualitative point of view, the transitions of thermoplastic elastomers are not easy to discuss since they strongly depend on many factors such as the typology and amounts of the elastomeric component, of the polyolefin, and of the oils and additives involved in the formulation [56]. Regarding the TPE used in this study, the only information provided by the producer was that it is formed by SEBS and polyolefins.…”

Section: Viscoelastic Properties Of the Wb-based Compositesmentioning

confidence: 99%

“…Regarding the TPE used in this study, the only information provided by the producer was that it is formed by SEBS and polyolefins. According to the literature [56], different peaks can be recognized in SEBS-polyolefin blends: the glass transition of the soft segment of a styrene-olefin block copolymer (from −70 to −55 • C), the glass transition of the amorphous domain of the polyolefin (from −20 to 10 • C), the α-relaxation of the crystalline phase of the polyolefin (between 50 and 125 • C), and the glass transition of the hard segment of the styrene-olefin block copolymer (between 30 • C and 60 • C).…”

Section: Viscoelastic Properties Of the Wb-based Compositesmentioning

confidence: 99%

Thermo-Mechanical and Morphological Properties of Polymer Composites Reinforced by Natural Fibers Derived from Wet Blue Leather Wastes: A Comparative Study

et al. 2021

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The present work investigated the possibility to use wet blue (WB) leather wastes as natural reinforcing fibers within different polymer matrices. After their preparation and characterization, WB fibers were melt-mixed at 10 wt.% with poly(lactic acid) (PLA), polyamide 12 (PA12), thermoplastic elastomer (TPE), and thermoplastic polyurethane (TPU), and the obtained samples were subjected to rheological, thermal, thermo-mechanical, and viscoelastic analyses. In parallel, morphological properties such as fiber distribution and dispersion, fiber–matrix adhesion, and fiber exfoliation phenomena were analyzed through a scanning electron microscope (SEM) and energy-dispersive spectroscopy (EDS) to evaluate the relationship between the compounding process, mechanical responses, and morphological parameters. The PLA-based composite exhibited the best results since the Young modulus (+18%), tensile strength (+1.5%), impact (+10%), and creep (+5%) resistance were simultaneously enhanced by the addition of WB fibers, which were well dispersed and distributed in and significantly branched and interlocked with the polymer matrix. PA12- and TPU-based formulations showed a positive behavior (around +47% of the Young modulus and +40% of creep resistance) even if the not-optimal fiber–matrix adhesion and/or the poor de-fibration of WB slightly lowered the tensile strength and elongation at break. Finally, the TPE-based sample exhibited the worst performance because of the poor affinity between hydrophilic WB fibers and the hydrophobic polymer matrix.

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Quantifying microstructural, thermal, mechanical and solid-state viscoelastic properties of polyolefin blend type thermoplastic elastomer compounds

Cited by 21 publications

References 32 publications

Wastes from Agricultural Silage Film Recycling Line as a Potential Polymer Materials

Wastes from Agricultural Silage Film Recycling Line as a Potential Polymer Materials

Structure and performance of hydrogenated styrenic block copolymers/polypropylene/oil (HSBCs/PP/oil) composites

Thermo-Mechanical and Morphological Properties of Polymer Composites Reinforced by Natural Fibers Derived from Wet Blue Leather Wastes: A Comparative Study

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