A new TPE-based foam material from EPDM/PPB blends, as a potential buffer energy-absorbing material

Zhang, Z. X.; Wang, Y. M.; Zhao, Yunfeng; Zhang, X.; Phule, Ajit Dattatray

doi:10.3144/expresspolymlett.2021.10

Cited by 10 publications

(6 citation statements)

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“…The enhancement in peak intensity at 2077–2079 and 1665–1666 cm −1 confirmed that compatibility between the components was achieved. As known, the foaming process is a completely physical process and does not involve the breaking and formation of chemical bonds 15 and thus does not appear in any function groups in EPDM/AZD compared to EPDM/AZD/f‐MWCNTs. Furthermore, the peaks present between 1248–1253 cm −1 , 1078–1084 cm −1 and 481–611 cm −1 correspond to the Si–C, Si–O and O–Si–O bonds in VTES 33 .…”

Section: Resultsmentioning

confidence: 99%

“…Much research [12][13][14] has been carried out on blending foaming rubber with thermoplastic to improve the performance of the sponge material for use in a variety of industrial applications in which the rubber acts as a continuous phase while the plastic is used as a dispersed phase to promote the strength of the cellular material. 15 However, few studies have been published on blending EPDM elastomer with plastic, and the use of EPDM rubber elastomer itself with functionalized MWCNT-COOH (i.e., f-MWCNTs) as a promising barrier filler in the presence of AZD foaming agent to produce sponge EPDM nanocomposites has not been reported in the literature yet. EPDM rubber plays a pivoted role in many engineering applications because of its excellent bulk properties and low cost.…”

Section: Introductionmentioning

confidence: 99%

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Improvement of the acoustic and mechanical properties of sponge ethylene propylene diene rubber/carbon nanotube composites crosslinked by subsequent sulfur and electron beam irradiation

Eyssa

Afifi

Moustafa

2022

Polymer International

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In this research, sponge ethylene propylene diene rubber (EPDM) nanocomposites based on functionalized multi-walled carbon nanotubes (f-MWCNTs) and foaming agent azodicarbonamide (AZD) were successfully fabricated as potential acousticabsorbing foams. Two crosslinking systems were utilized for stabilizing the foam structure and improving its properties by subsequent sulfur and electron beam irradiation at 50 kGy as a fixed dose. The impacts of the concentration of AZD, f-MWCNTs and crosslinking systems on acoustic and physico-mechanical properties were investigated. The results manifested that the optimum foaming content was 3 phr. The acoustic data exhibited satisfactory enhancement in the sound absorption coefficient (⊍) for irradiated foam nanocomposites compared to unirradiated nanocomposites. This was attributed to the barrier effect of f-MWCNTs in reducing the pore size of the foam, leading to an increase in the tortuous path in the foam matrix that stifled the sound waves from transferring into the bulk. Likewise, the compression properties were also improved. However, tensile stress and strain at break values for irradiated foams relatively decreased. The data obtained revealed an excellent possibility of using these EPDM foam nanocomposites for potential applications such as acoustic panels and airborne sound insulation.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improvement of the acoustic and mechanical properties of sponge ethylene propylene diene rubber/carbon nanotube composites crosslinked by subsequent sulfur and electron beam irradiation

Eyssa

Afifi

Moustafa

2022

Polymer International

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“…A vulcanization time of less than 18 min was supposed to produce inadequate crosslinking in EPDM, which brought about too low melt strength to foam well. [41,44,45] However, a longer prevulcanization time of more than 18 min produced a denser crosslinking network structure in EPDM molecules, which hindered the cell growth in the foaming process. At the same time, it could be seen from Figure 2 that although the ratio of PPB/EPDM changed, the foaming density remained similar, and the foaming phenomenon occurred in both phases of EPDM and PPB.…”

Section: The Density and Micromorphology Of Ppb/epdm Blend Foammentioning

confidence: 99%

“…[39,40] As an important characteristic of TPV materials, the recyclability/reprocessing ability has been however scarcely reported. Zhang et al [41] studied the effect of irradiation crosslinking on the foamability of ethylene propylene diene monomer/propylene butene copolymer (EPDM/PPB) blend, the results showed that the mechanical strength increased with the increase of irradiation amount, and the mechanical performance remained at the same level after five times of processing. Rajasekaran and Maji [42] studied the recyclability of the plastic/rubber blends included waste, 7% ionomer was added as a compatibilizer to improve the performance of the recycled plastic/rubber blends.…”

Section: Introductionmentioning

confidence: 99%

Development of propylene butene copolymer/ethylene propylene diene monomer blend foam and the effect of network structure on its reprocessing properties

Zhou

Li-juan

et al. 2023

Polymer Engineering & Sci

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Thermoplastic materials have received extensive attention for their excellent mechanical properties and reproducibility, and have been emerging in lightweight accessories. However, for the traditional thermoplastic vulcanized (TPV) rubber, the dynamic vulcanization process makes it difficult to achieve low density and good compression performance. Herein, lightweight propylene butene copolymer/ethylene propylene diene monomer (PPB/EPDM) blend foam was prepared by static vulcanization of PPB and EPDM blend and supercritical nitrogen (sc-N 2 ) foaming technology. The minimum density and compression set of the PPB/EPDM blend foam were 0.065 g/cm 3 and 13.6% respectively, a significant improvement was obtained compared with TPV. In addition, the PPB/EPDM blends retained the mechanical properties after seven times reprocessing, and the blend foam had similar cell structures to that of dynamic vulcanized TPV foam because of the phase transition of PPB/EPDM blend during reprocessing. This work provided an idea for the preparation of high-performance, lightweight, and recyclable thermoplastic materials.

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“…The mechanical properties of such structured materials can be easily modified by varying the ratio of the hard and soft segments 86 . This was studied by Thomas and Harvey, 82 who investigated the hardness, tensile strength, and elongation at break of PVC/NBR materials.…”

Section: Sports Application Of Polymeric Foamsmentioning

confidence: 99%

Polymer foams as advanced energy absorbing materials for sports applications—A review

Tomin

Kmetty

2021

J of Applied Polymer Sci

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The use of polymer foams is becoming increasingly important due to the attainable weight reduction and value‐added properties. The development of foam structures is a popular research area as they have outstanding energy absorbing capability, which is related to the special deformation mechanisms of the cell structure (cell wall buckling and collapse of the cells). This property is exploited by the sports industry, where the main task of such products is to protect the health of the athlete and to ensure safe sports conditions. This review provides a comprehensive presentation of the advanced energy absorbing applications of polymeric foams in sports. The article presents in detail the processing technologies of polymer foams, as well as the sports‐specific regulations which contain the requirements for sports products. The impact damping of polymeric foams is typically determined by falling weight impact tests, which were used in several previous studies. However, it is a great challenge to compare the published results, as the test parameters and the tested materials are different. Currently, an unexplored field of research is the detailed study of multilayer sandwich foam structures. Understanding the effect of layer order on mechanical properties would help researchers achieve a major improvement in this field.

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A new TPE-based foam material from EPDM/PPB blends, as a potential buffer energy-absorbing material

Cited by 10 publications

References 0 publications

Improvement of the acoustic and mechanical properties of sponge ethylene propylene diene rubber/carbon nanotube composites crosslinked by subsequent sulfur and electron beam irradiation

Improvement of the acoustic and mechanical properties of sponge ethylene propylene diene rubber/carbon nanotube composites crosslinked by subsequent sulfur and electron beam irradiation

Development of propylene butene copolymer/ethylene propylene diene monomer blend foam and the effect of network structure on its reprocessing properties

Polymer foams as advanced energy absorbing materials for sports applications—A review

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