Christopher W. Macosko
YOU?
Author Swipe
View article: DoS Dos and Don'ts
DoS Dos and Don'ts Open
Dripping-onto-Substrate (DoS) rheometry is a well-established method for measuring the extensional rheology of low-viscosity liquids. However, clear guidelines on the capabilities and limitations of the technique are lacking. In the presen…
View article: Polyethylene Blends for Improved Oxygen Barrier: Processing-Dependent Microstructure and Gas Permeability
Polyethylene Blends for Improved Oxygen Barrier: Processing-Dependent Microstructure and Gas Permeability Open
Here this work demonstrates a greater than expected enhancement of oxygen barrier properties in linear low-density polyethylene (LLDPE)-based materials by blending LLDPE with high-density polyethylene (HDPE). The films made by melt pressin…
View article: Improved Polypropylene Thermoformability through Polyethylene Layering
Improved Polypropylene Thermoformability through Polyethylene Layering Open
Due to its low cost, stiffness, and recyclability, isotactic polypropylene (iPP) is an excellent candidate for packaging applications. However, iPP is notoriously difficult to thermoform due to its low melt strength. The addition of just 1…
View article: Degradation and Breakdown of Polymer/Graphene Composites under Strong Electric Field
Degradation and Breakdown of Polymer/Graphene Composites under Strong Electric Field Open
In this work, we study the effect of strong electric fields on a polymer/graphene composite and the resulting morphology upon its dielectric breakdown. Our model system was produced by compounding up to 0.25 wt % graphene nanoplatelets (GN…
View article: Linear, Graft, and Beyond: Multiblock Copolymers as Next-Generation Compatibilizers
Linear, Graft, and Beyond: Multiblock Copolymers as Next-Generation Compatibilizers Open
Properly addressing the global issue of unsustainable plastic waste generation and accumulation will require a confluence of technological breakthroughs on various fronts. Mechanical recycling of plastic waste into polymer blends is one me…
View article: Effects of a Layered Morphology on Drip Suppression in Burning Polymers
Effects of a Layered Morphology on Drip Suppression in Burning Polymers Open
Fire safety in polymers is critically important with products such as textiles and consumer goods, as well as materials used in construction, aerospace, transportation, and furniture. Additives used as anti-dripping and flame-retardant age…
View article: PET/Graphene Compatibilization for Different Aspect Ratio Graphenes via Trimellitic Anhydride Functionalization
PET/Graphene Compatibilization for Different Aspect Ratio Graphenes via Trimellitic Anhydride Functionalization Open
Two trimellitic anhydride-functionalized, thermally reduced graphenes with different aspect ratios, A f, and the same C/O ratio (8:1) were prepared and melt-mixed into poly(ethylene terephthalate) (PET), and the mechanica…
View article: Higher-Order Structure in Amorphous Poly(ethylene terephthalate)/Graphene Nanocomposites and Its Correlation with Bulk Mechanical Properties
Higher-Order Structure in Amorphous Poly(ethylene terephthalate)/Graphene Nanocomposites and Its Correlation with Bulk Mechanical Properties Open
Graphene of two different aspect ratios, A f, was melt mixed with poly(ethylene terephthalate) (PET) to form amorphous PET/graphene composites with less than 5% crystallinity. The higher-order structure and mechanical pro…
View article: Raman imaging of surface and sub-surface graphene oxide in fiber reinforced polymer nanocomposites
Raman imaging of surface and sub-surface graphene oxide in fiber reinforced polymer nanocomposites Open
View article: Sub‐Micrometer Zeolite Films on Gold‐Coated Silicon Wafers with Single‐Crystal‐Like Dielectric Constant and Elastic Modulus
Sub‐Micrometer Zeolite Films on Gold‐Coated Silicon Wafers with Single‐Crystal‐Like Dielectric Constant and Elastic Modulus Open
A low‐temperature synthesis coupled with mild activation produces zeolite films exhibiting low dielectric constant (low‐ k ) matching the theoretically predicted and experimentally measured values for single crystals. This synthesis and ac…
View article: Synthesis and Rheology of Branched Multiblock Polymers Based on Polylactide
Synthesis and Rheology of Branched Multiblock Polymers Based on Polylactide Open
To improve the toughness and processability of poly(lactic acid) (PLA), a branched multiblock polymer was prepared from d,l-lactide and ε-decalactone. A hydroxy telechelic four-arm star poly(ε-decalactone)–poly(d,l-lactide) diblock was syn…
View article: Cover Picture: Open‐Pore Two‐Dimensional MFI Zeolite Nanosheets for the Fabrication of Hydrocarbon‐Isomer‐Selective Membranes on Porous Polymer Supports (Angew. Chem. Int. Ed. 25/2016)
Cover Picture: Open‐Pore Two‐Dimensional MFI Zeolite Nanosheets for the Fabrication of Hydrocarbon‐Isomer‐Selective Membranes on Porous Polymer Supports (Angew. Chem. Int. Ed. 25/2016) Open
Piranha fish have sharp teeth and are known for their ferocious appetite. Piranha solution, a mixture of sulfuric acid and hydrogen peroxide, is one of the strongest oxidizing agents used for the removal of organic residues, and is employe…
View article: Open‐Pore Two‐Dimensional MFI Zeolite Nanosheets for the Fabrication of Hydrocarbon‐Isomer‐Selective Membranes on Porous Polymer Supports
Open‐Pore Two‐Dimensional MFI Zeolite Nanosheets for the Fabrication of Hydrocarbon‐Isomer‐Selective Membranes on Porous Polymer Supports Open
Two‐dimensional zeolite nanosheets that do not contain any organic structure‐directing agents were prepared from a multilamellar MFI (ML‐MFI) zeolite. ML‐MFI was first exfoliated by melt compounding and then detemplated by treatment with a…
View article: Open‐Pore Two‐Dimensional MFI Zeolite Nanosheets for the Fabrication of Hydrocarbon‐Isomer‐Selective Membranes on Porous Polymer Supports
Open‐Pore Two‐Dimensional MFI Zeolite Nanosheets for the Fabrication of Hydrocarbon‐Isomer‐Selective Membranes on Porous Polymer Supports Open
Two‐dimensional zeolite nanosheets that do not contain any organic structure‐directing agents were prepared from a multilamellar MFI (ML‐MFI) zeolite. ML‐MFI was first exfoliated by melt compounding and then detemplated by treatment with a…
View article: Zeolite Membranes: Oriented MFI Membranes by Gel‐Less Secondary Growth of Sub‐100 nm MFI‐Nanosheet Seed Layers (Adv. Mater. 21/2015)
Zeolite Membranes: Oriented MFI Membranes by Gel‐Less Secondary Growth of Sub‐100 nm MFI‐Nanosheet Seed Layers (Adv. Mater. 21/2015) Open
Continuous oriented molecular sieve membranes can now be made as thin as 100 nm. On page 3243, M. Tsapatsis, K. B. Yoon, and co-workers present a deposition method involving the transformation of underlying nanoparticles to the zeolite, se…
View article: 2D Zeolite Coatings: Langmuir–Schaefer Deposition of 3 nm Thick MFI Zeolite Nanosheets
2D Zeolite Coatings: Langmuir–Schaefer Deposition of 3 nm Thick MFI Zeolite Nanosheets Open
Stable suspensions of zeolite nanosheets (3 nm thick MFI layers) were prepared in ethanol following acid treatment, which partially removed the associated organic structure‐directing agent. Nanosheets from these suspensions could then be d…
View article: Oriented MFI Membranes by Gel‐Less Secondary Growth of Sub‐100 nm MFI‐Nanosheet Seed Layers
Oriented MFI Membranes by Gel‐Less Secondary Growth of Sub‐100 nm MFI‐Nanosheet Seed Layers Open
A zeolite membrane fabrication process combining 2D-zeolite nanosheet seeding and gel-free secondary growth is described. This process produces selective molecular sieve films that are as thin as 100 nm and exhibit record high permeances f…
View article: Interfacial silica nanoparticles stabilize cocontinuous polymer blends
Interfacial silica nanoparticles stabilize cocontinuous polymer blends Open
We investigated the formation of cocontinuous structures in polymer blends. These polymeric bijels (bicontinuous interfacially jammed emulsion gels) were composed of polystyrene oligomer, polybutene and fluorescent hydrophobic silica nanop…