The synthesis of polysilylethers (PSEs) using a monomer derived from a biorenewable feedstock is reported. The AB-type monomer was synthesized from undecenoic acid through hydrosilylation and reduction, and the polymerization was catalyzed by earth-abundant metal salts. High-molar-mass products were achieved, and the degree of polymerization was controlled by varying the amount of an AA-type monomer in the reaction. The PSEs possess good thermal stability and a low glass-transition temperature (Tg≈−67 °C). To demonstrate the utility of the PSEs, polyurethanes were synthesized from low-molar-mass hydroxy-telechelic PSEs.
Advanced Treatment of Produced Water for Crop Irrigation - Case Study
The Situation California is currently facing one of the most severe droughts in recorded history. In order to mitigate the drought conditions, various water conservation measures have already been implemented, and others are being considered. One method under consideration is using the advanced treatment of produced water to make it available for irrigation. A major challenge to the success of this method is economically treating the produced water to achieve the quality mandated by California’s irrigation...
Reverse Engineering of EPS Recycling Process - Case Study
Project Location: SE PAClient: Private Corporation – Emerging Technology Start-Up Project Description: Having been granted a U.S. Utility Patent for a new chemical-reduction process to recycle expanded polystyrene, the company engaged an out of state firm to build a pre-production machine to pilot test and prove their technology. Due to a dispute subsequent to delivery, the fabricator withheld all design documents, making full understanding of the process and operation of the complex machinery extremely...
Vibratory Pile Driver used in Grand Canal Revetment construction
After years of investment and construction, in some relatively developed areas, the stage of large-scale investment in infrastructure has basically been completed. However, China is still in the stage of rapid development of industrialization and urbanization, and infrastructure, such as transportation, water conservancy, energy, information, and pipe networks, remains. There are many shortcomings, and the problem of inadequate development imbalance is still quite prominent. In recent years, Xiuzhou Transportation...
Wind-powered water pumping for irrigation and water supply - Case Study
Introduction Access to clean water is of paramount importance for ensuring necessary levels of sanitation and health. According to the World Health Organization over 844 million people lack even a basic drinking-water service, including 159 million people who are dependent on surface water. Globally, at least 2 billion people use a drinking water source contaminated with feces. Contaminated water can transmit diseases such diarrhea, cholera, dysentery, typhoid, and polio. By 2025, the WHO estimates half of the...
Industriewater Eerbeek - Case Study
Dealing with H2S in biogas from papermills Industriewater Eerbeek in the Netherlands treats wastewater from three different neighbouring paper mills. The biogas is used in a gas engine to generate electricity. The UASB-type bioreactors of the paper mills produce biogas that is polluted with hydrogen sulphide. To protect the gas engine from corrosion, the H2S has to be removed from the biogas. There are large fluctuations in the biogas flow and consequently, in the sulphur load.The customer chose THIOPAQ®...