How to optimize the process of polymer extrusion

Credit: Pixabay/CC0 Public Domain Extrusion is a process widely used in the polymer processing industry. It involves pushing material through a die with a specific cross-sectional shape, resulting in products like profiles, thin sheets, films and tubes. However, the shape of the final product (the so-called extrudate) is highly influenced by a phenomenon called swell.… Continue reading How to optimize the process of polymer extrusion

Catalyst turns three monomer mixtures into diblock dialternating terpolymers in a single step

Terpolymerization of TAz, PA, and PO at different reaction times. a Characteristic signals monitored by 1H NMR spectra. b Retention volume monitored by SEC traces. Credit: DOI: 10.1038/s41467-021-27377-3 A catalyst developed at KAUST could be the key to structural diversity in polymer materials and industrial-scale polymerizations involving multiple monomers. The catalyst transforms a mixture of… Continue reading Catalyst turns three monomer mixtures into diblock dialternating terpolymers in a single step

Cu interface matters during CO2 electroreduction

Graphical abstract. Credit: DOI: 10.1021/jacs.1c09508 It is attractive to convert CO2 into multicarbon hydrocarbons and oxygenates (C2+ products), but it is challenging to enhance the kinetics of carbon-carbon (C-C) coupling during CO2 reduction reaction (CO2RR). Cu has a superior catalytic performance in C-C coupling. However, its selectivity is undermined in a neutral medium due to… Continue reading Cu interface matters during CO2 electroreduction

Fire during riots exposes environmental impact of improperly stored agrochemicals | Business

Civil unrest is probably not at the top of most firms’ lists of significant vulnerabilities for chemical facilities, but that might change after uprisings in South Africa last year. For over a week in July 2021, rioters looted buildings across KwaZulu-Natal and set them on fire, including a warehouse of agrochemicals producer UPL in Cornubia,… Continue reading Fire during riots exposes environmental impact of improperly stored agrochemicals | Business

Method of molecular-level control can double the efficiency of widely used industrial catalysts

Scanning transmission electron microscopy images of catalysts metallic copper (yellow) and zinc oxide (pink/orange). In the image on the left, metallic Cu and Zn oxide are mostly present as separate particles after activation with H2. The image on the right shows Zn oxide decorating metallic Cu particles after “induced activation” with H2/CH3OH/H2O. Credit: of Xuan… Continue reading Method of molecular-level control can double the efficiency of widely used industrial catalysts

Royal Society report says there’s no silver bullet to fix ‘scientific misinformation’ | News

There’s no quick and easy way to fix the problem of ’scientific misinformation’, argues a new report released by the Royal Society.  As communication technologies have changed, so has the scale and speed with which misinformation spreads, says the report. ‘So the responses to it have to similarly be upgraded,’ report author Frank Kelly, a… Continue reading Royal Society report says there’s no silver bullet to fix ‘scientific misinformation’ | News

Novel Hybrid Nanocages for Improved Catalytic Efficiency

The cage was engineered with amino acid replacements by introducing site-specific mutations that allowed more IrCp* uptake. Credit: Takafumi Ueno from Tokyo Institute of Technology A novel hybrid ferritin nanocage with histidine residues shows 1.5 times higher metal ion uptake and improved catalytic efficiency for alcohol production, find researchers from Tokyo Tech in a new… Continue reading Novel Hybrid Nanocages for Improved Catalytic Efficiency

Sum frequency generation imaging for semi-crystalline polymers

1. Jones RAL, Richards RW. Polymers at surfaces and interfaces. Cambridge University Press, 1999. 2. Tsui OKC, Russell TP. Polymer thin films. World Scientifc, 2008. 3. Nishino T, Matsumoto T, Nakamae K. Surface structure of isotactic polypropylene by X-ray diffraction. Polym Eng Sci. 2000;40:336–43. CAS  Article  Google Scholar  4. Yakabe H, Tanaka K, Nagamura T,… Continue reading Sum frequency generation imaging for semi-crystalline polymers