Bimodal Microcellular Morphology Evaluation in ABS‐Foamed Composites Developed Using Step‐Wise Depressurization Foaming Process

Radhakrishna, Ganesh; Dugad, Rupesh; Gandhi, Abhishek

doi:10.1002/pen.25265

Cited by 7 publications

(1 citation statement)

References 41 publications

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“…For this purpose, polymer foams with BCS are a sort of promising materials, which could be used in fields of packing, chemistry industry and construction. [ 30 ] Up to now, some effective approaches have been carried out to prepare polymer foams with BCS, including two‐step depressurization, multiphase polymer melt‐blending, the synergistic effect of cooling and depressurization, as well as co‐blowing agent method. Salerno et al [ 31 ] prepared porous scaffolds of polycaprolactone (PCL)/hydroxyapatite nanocomposites with BCS via two‐step depressurization foaming method and the results demonstrated that the control of the intermediate pressure and thermal history was necessary to design porous PCL scaffolds with BCS.…”

Section: Introductionmentioning

confidence: 99%

An innovative strategy to regulate bimodal cellular structure in chain extended poly(butylene adipate‐co‐terephthalate) foams

Cui

Zhou

Yin

et al. 2020

Vinyl Additive Technology

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A facile and effective approach for manufacturing poly(butylene adipate‐co‐terephthalate) (PBAT) foams with obvious bimodal cellular structure (BCS) was proposed utilizing chain extension and batch supercritical CO2 foaming technology. Ethylene‐glycidyl methacrylate copolymer (EGMA) as crystalline chain extender was selected to modify PBAT. The results of torque tests, differential scanning calorimetry, and rheological performances demonstrated that the melt strength, viscoelasticity, and crystallization properties of PBAT were improved after introducing EGMA. The influences of EGMA content and foaming temperature on the cellular structure of PBAT foams were investigated systematically. By decreasing the foaming temperature, the size of both large and small cells in the bimodal chain extended PBAT‐3 (CPBAT‐3) foams decreased, as well as their BCS became distinct gradually. The BCS in diverse CPBAT foams was successfully controlled via varying EGMA content and foaming temperature. Finally, the formation mechanism of BCS in diverse PBAT foams was presented.

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Section: Introductionmentioning

confidence: 99%

An innovative strategy to regulate bimodal cellular structure in chain extended poly(butylene adipate‐co‐terephthalate) foams

Cui

Zhou

Yin

et al. 2020

Vinyl Additive Technology

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Microcellular Conductive Carbon Black or Graphene/PVDF Composite Foam with 3D Conductive Channel: A Promising Lightweight, Heat‐Insulating, and EMI‐Shielding Material

Jia

Phule

Geng

et al. 2021

Macro Materials & Eng

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In this study, a lightweight microcellular carbon‐based filler/poly(vinylidene fluoride) (PVDF) composite foam is fabricated with a 3D conductive network that is thermally insulating, electrically conductive, and fabricated on a large scale. This composite can be used for high‐efficiency thermal insulation and electromagnetic interference (EMI) shielding applications. The prepared composite demonstrates low density, high electrical conductivity, and excellent thermal insulation properties. The structure and density of the conductive network and the carbon‐based filler content has a significant influence on the electrical conductivity of the prepared composite foam. Although the composite comprises microcellular PVDF beads of the same density, the conductivity of the composite‐comprising strip beads is greater than that comprising spherical beads. In the same conductive network structure, as the size of the microcellular PVDF beads decrease, the conductive network becomes denser, which results in a higher conductivity. Furthermore, with an increase in the conductive filler content, the conductivity improves significantly. Excellent EMI shielding materials with optimal filler content and particle shapes, exhibiting EMI shielding effectiveness of up to 40–50 dB, are developed. The prepared composite foam possesses excellent application potential in the fields of ultra‐light thermal insulation, conductivity, and EMI shielding.

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Electrospun nanofibers of poly (lactic acid)/poly (ε‐caprolactone) blend for the controlled release of levetiracetam

Ghafouri

Mousavi

Khakestani

et al. 2022

Polymer Engineering & Sci

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This study deals with poly(lactic acid) (PLA), poly(ε‐caprolactone) (PCL), and their blend electrospun nanofibers (ESNF) as novel systems for the release of levetiracetam (LEV). Scanning electron microscopy demonstrated that the morphology of all samples is smooth and beads‐free. In addition, with increasing LEV content, the average diameters of PLA, PCL, and PCL/PLA ESNF enhanced by almost 69%, 41%, and 14%, respectively. FTIR spectroscopy was utilized to confirm the structure of polymer and drug, polymer‐drug interaction, and the observation of functional groups. The pore percentage was also diminished by adding LEV. The results of x‐ray diffraction revealed that the crystallinity decreased from 18.2%, 40.1%, and 21.5% for PLA, PCL, and PLA/PCL ESNF, respectively, to 15%, 31.2%, and 13.6% for the samples containing 18 wt% LEV. In addition, PLA ESNF containing 10 and 18 wt% LEV demonstrated a steady uptrend for drug release, while PCL and PLA/PCL ESNF containing 10 and 18 wt% LEV initially indicated an abrupt increase in drug release and then became steady. Moreover, drug release kinetics were evaluated using different models such as zero order, first order, Higuchi, and Korsmeyer‐Peppas models and the best model for predicting the drug release behavior was selected.

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Bimodal Microcellular Morphology Evaluation in ABS‐Foamed Composites Developed Using Step‐Wise Depressurization Foaming Process

Cited by 7 publications

References 41 publications

An innovative strategy to regulate bimodal cellular structure in chain extended poly(butylene adipate‐co‐terephthalate) foams

An innovative strategy to regulate bimodal cellular structure in chain extended poly(butylene adipate‐co‐terephthalate) foams

Microcellular Conductive Carbon Black or Graphene/PVDF Composite Foam with 3D Conductive Channel: A Promising Lightweight, Heat‐Insulating, and EMI‐Shielding Material

Electrospun nanofibers of poly (lactic acid)/poly (ε‐caprolactone) blend for the controlled release of levetiracetam

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