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Lankem Ceylon PLC is a chemicals, paints and consumer goods manufacturing company in Sri Lanka. The company also engaged in the hospitality industry by owning and operating resorts in Sri Lanka. The company is incorporated in 1964 by Royal Dutch Shell and listed on the Colombo Stock Exchange in 1970.
Poly(2-hydroxyethyl methacrylate) (pHEMA) is a polymer that forms a hydrogel in water. Poly (hydroxyethyl methacrylate) (PHEMA) hydrogel for intraocular lens (IOL) materials was synthesized by solution polymerization using 2-hydroxyethyl methacrylate as raw material, ammonium persulfate and sodium pyrosulfite (APS/SMBS) as catalyst, and triethyleneglycol dimethacrylate (TEGDMA) as cross ...
CIC Holdings PLC is a Sri Lankan conglomerate holding company engaged in merchandising and manufacturing chemical products. The company was incorporated in 1964 and listed on the Colombo Stock Exchange in the same year. Initially, the company was a part of Imperial Chemical Industries and prior to 2011, was known as Chemical Industries (Colombo ...
Self-healing hydrogels are a specialized type of polymer hydrogel.A hydrogel is a macromolecular polymer gel constructed of a network of crosslinked polymer chains. Hydrogels are synthesized from hydrophilic monomers by either chain or step growth, along with a functional crosslinker to promote network formation.
The single largest investment in the 140-plus year history of Hayleys (and the largest acquisition of a public listed company at the time) was the 10.8 billion rupee controlling stake of Singer Sri Lanka in 2017, [31] followed by the buying over of the five-star Ceylon Continental Hotel in Colombo, Sri Lanka (now known as The Kingsbury) in 2010.
In order to describe the time-dependent creep and stress-relaxation behavior of hydrogel, a variety of physical lumped parameter models can be used. [40] These modeling methods vary greatly and are extremely complex, so the empirical Prony Series description is commonly used to describe the viscoelastic behavior in hydrogels.
Hysteresis is used to measure the compression properties of nanocomposite hydrogels, which shows that this material can withstand around 90% compression. This data shows that nanocomposite hydrogels exhibit superior strength relative to conventionally-made hydrogels, which would have broken down under less compression.
AMPS is made by the Ritter reaction of acrylonitrile and isobutylene in the presence of sulfuric acid and water. [2] The recent patent literature [3] describes batch and continuous processes that produce AMPS in high purity (to 99.7%) and improved yield (up to 89%, based on isobutene) with the addition of liquid isobutene to an acrylonitrile / sulfuric acid / phosphoric acid mixture at 40°C.