The oil absorption capacity of polypropylene porous absorbents fabricated through iPP/EVA in situ microfibrillar composites: effect of fibrillar morphology

Luo, Shanshan; Liu, Nan; Li, Juan; Gao, Chengtao; Sun, Jie; Wang, Yanwen; Zhang, Li; Song, Lu; Huang, Shaowen; Li, Jian; He, Shengbao

doi:10.1007/s10934-022-01327-w

Cited by 2 publications

(1 citation statement)

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“…The melt flowed through a twin-screw extruder, a connector and an assembly of LMEs, and finally formed a sheet about 0.30 mm thick and 200 mm wide. 31 The twin-screw extruder was operated with a screw speed of 150 rpm at temperatures of 180, 195 and 200°C for the fed, middle and extruded regions, respectively. The temperature of connector and LMEs was maintained at 200 °C.…”

Section: Specimen Preparationmentioning

confidence: 99%

Morphological evolution ofTMB‐5/ethylene–vinyl alcohol copolymer blends under biaxial‐stretching field and its effect on the crystallization and gas barrier properties of isotactic polypropylene

Luo

Liu

et al. 2023

Polymer International

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The morphological evolution of TMB‐5/ethylene–vinyl alcohol (EVOH) copolymer blends under biaxial‐stretching field and its effect on the crystallization and gas barrier properties of isotactic polypropylene (iPP) were investigated. iPP/TMB‐5/EVOH ternary blends with TBM‐5 selectively distributed in the EVOH phase were prepared through a multistage stretching extrusion, which combined an assembly of layer multiplying elements (LMEs) with an extruder. Scanning electron microscopy revealed that the biaxial‐stretching field in LMEs transformed the TMB‐5/EVOH phase into platelets along the extrusion direction. Differential scanning calorimetry and X‐ray diffraction results indicated that the TMB‐5 particles were distributed in the EVOH phase and no β crystals formed in as‐extruded samples. Especially, the TMB‐5 was released from the EVOH phase into iPP in the annealing process and induced the formation of β crystals. Compared with that of pure iPP, the oxygen permeability coefficient of iPP containing aligned TMB‐5/EVOH platelets decreased more than three times. The enhanced barrier properties resulted from the increased tortuosity of the diffusion pathway caused by the orientated high‐aspect‐ratio platelets. © 2023 Society of Industrial Chemistry.

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Section: Specimen Preparationmentioning

confidence: 99%