Preparation and balanced mechanical properties of solid and foamed isotactic polypropylene/<scp>SEBS</scp> composites

Zhang, Xiaoli; Sun, Baode; Yuan, Guoyuan; Zhang, Shixun; Ji, Youxin; Bao-chen, Liu; Zhang, Mingxin; Yang, Yang

doi:10.1002/app.50342

Cited by 4 publications

(1 citation statement)

References 58 publications

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“…Furthermore, the foaming of triblock elastomers, including SEBS-based foam remains largely unexplored compared to other TPEs, such as EPDM and ethylene vinyl acetate foams. Only a limited number of investigations have been reported regarding SEBS foams, such as supercritical carbon dioxide physical foaming of SEBS/PP and SEBS/PS − or supercritical nitrogen foaming of SEBS . However, the abovementioned materials exhibited low expansion ratios and rather limited success.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Triblock Elastomer Foams for Oil Absorption Applications: Effects of Crosslinking, Composition, and Rheology Factors

Lee

Gupta

Mekonnen

2023

ACS Appl. Polym. Mater.

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Oil spill accidents and oil-contaminated wastewater release from industries cause severe environmental pollution, resource waste, and economic loss. Thus, there is a dire need for an efficient oil/water separation approach to mitigate the challenge. Among the various oil/water separation technologies, employing oilabsorbing materials is one of the most effective strategies. In this work, a highly effective elastomer foam based on styrene−ethylene−butylene−styrene (SEBS) and ethylene propylene diene monomer (EPDM) blend was developed. Dicumyl peroxide was employed as a radical initiator for the crosslinking of the elastomer blend. The crosslinking of the blend significantly increased the melt strength of the SEBS/EPDM blend and therefore allowed them to expand extensively (up to 1200 vol %) with substantial volume increase (expansion ratio 12.8−13.1) and created pores with well-defined structures. As a result, the material exhibited outstanding oil absorption (up to 1030 wt %) due to an enlarged surface area and blend constituents. The incorporation of EPDM and radical-mediated crosslinking prevented the dissolution of SEBS in the oil and maintained the structural integrity of the foam in the oil, paving the way for recyclability. Also, the inherent hydrophobicity of employed polymers led to poor interaction with water and, thus, outstanding oil/ water separation ability of the developed elastomer foams. Additionally, the foaming of triblock polymers, including SEBS, remained largely unexplored. This study has elucidated the impact of crosslinking and rheological factors on the successful foaming of SEBS.

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Section: Introductionmentioning

confidence: 99%

Fabrication of Triblock Elastomer Foams for Oil Absorption Applications: Effects of Crosslinking, Composition, and Rheology Factors

Lee

Gupta

Mekonnen

2023

ACS Appl. Polym. Mater.

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Preparation Process Orthogonal Optimization and Mechanical Properties of Microcellular Foam Polypropylene

Huang

Qin

et al. 2021

Macro Materials & Eng

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Melt strength, pressure and the amount of gas have significant effects on the foaming of polypropylene (PP). It is convenient to study the influence of these factors on foaming effect by orthogonal test. The experiment result shows that within the set factors and levels, the improvement of melt and the concentration of foaming masterbatch has the greatest influence on the cell size and density of foamed PP, respectively. When the concentration of azodicarbonamide (ADC) is 15 %, PP/ethylene‐propylene terpolymer (EPDM) = 90:10, and SiO2 content is 3%, the foaming effect is the best. At this time, the cell diameter decreases by 42.7%, cell density increases by more than 7.5 times compared with that without optimization. Material density decreases from 0.92 to 0.56 g cm−3. It is also found that good closed‐cell structure can improve the bending and impact properties of PP in varying degrees, especially the impact strength is 55.7% higher than that of neat PP. Finally, the promoting mechanism of cell structure on mechanical properties of materials is discussed, which is of great significance for the preparation of microfoamed PP materials and the deep research of its cell structure.

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Remarkably improved toughness of isotactic polypropylene realized by introducing star-shaped SEBS and annealing treatment

Liu

Guo

2022

Polym. Bull.

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Preparation and balanced mechanical properties of solid and foamed isotactic polypropylene/SEBS composites

Cited by 4 publications

References 58 publications

Fabrication of Triblock Elastomer Foams for Oil Absorption Applications: Effects of Crosslinking, Composition, and Rheology Factors

Fabrication of Triblock Elastomer Foams for Oil Absorption Applications: Effects of Crosslinking, Composition, and Rheology Factors

Preparation Process Orthogonal Optimization and Mechanical Properties of Microcellular Foam Polypropylene

Remarkably improved toughness of isotactic polypropylene realized by introducing star-shaped SEBS and annealing treatment

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