Your Complete Guide To Play Dates
- Mary Jo Dilonardo
- Jul 16, 2021
- 1 min read
A reference guide to setting up playdates, by Mary Jo Dilonardo, courtesy of Parents magazine.
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A reference guide to setting up playdates, by Mary Jo Dilonardo, courtesy of Parents magazine.
Ethylene glycol is a colorless, odorless, and sweet-tasting organic compound commonly used as an antifreeze and coolant in automotive and industrial applications. Its chemical formula is C₂H₆O₂, and it is classified as a diol due to the presence of two hydroxyl (-OH) groups. When mixed with water, ethylene glycol lowers the freezing point and raises the boiling point of the solution, making it ideal for use in engines to prevent freezing in winter and overheating in summer. Apart from antifreeze, it is also utilized in hydraulic brake fluids and as a heat transfer agent in HVAC systems.
In the industrial sector, ethylene glycol serves as a key raw material in the production of polyester fibers and polyethylene terephthalate (PET) resins, which…
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Photoinitiators are chemical compounds that absorb light and undergo a photochemical reaction to produce reactive species such as free radicals or cations. These reactive intermediates initiate polymerization of monomers, primarily in UV-curable systems. They play a crucial role in applications like inks, coatings, adhesives, and dental materials, where rapid curing under UV or visible light is required. Photoinitiators are categorized mainly into two types: Type I (cleavage-type) and Type II (hydrogen abstraction-type), each with different mechanisms of action depending on the chemical structure and light wavelength absorbed.
The effectiveness of a photoinitiator depends on several factors including absorption spectrum, quantum yield, and compatibility with the resin system. Advancements in photoinitiator technology have led to the development of low-migration and high-performance…
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