Polymer

food that we eat, and thousands of other simple and confusing things depend on chemistry. In this particular case, the relationship between Polyvinyl Alcohol (PVA) and Sodium Borate (Borax) is being investigated. PVA is a water soluble synthetic polymer (Maciborski, and Salamone), while Borax is a natural mineral with many household uses. It can be used as herbicide, to bleach teeth, as a household cleaner, and a

polyhydroxyalkanaoate is poly(3-hydroxybutyrate), and this polymer was first discovered by Lemoigne in 1925 by a French scientist[9]. After that time, various bacterial strains such as gram negative bacteria, photosynthetic bacteria, gram positive bacteria, archaebacteria and cyanobacteria (17,18) have been identified to store up poly (3- hydroxybutyrate) both anaerobically and aerobically. In the year 1973, poly (3-hydroxybutyrate) was recognized as a bacterial storage polymer that had a function which was identical

The use of polymers in controlling the release of drugs has become important in the formulation of pharmaceuticals. Water soluble polymers such as polyethylene glycol and polyvinylpyrrolidone may be used to increase the dissolution rates of poorly soluble drugs. Hydrogels provide the basis for implantation, transdermal and oral

exposed and reliant upon the use of polymers. From credit cards to nappies; plastic bottles to prescription glasses, the applications of polymers encompass an endless range of everyday necessities. However, the significance of synthetic polymers was not universally recognised until its initial introduction as polyethylene during World War II. During the combat, they served as a critical material for insulated radar electronics (ACC, 2005). The basic principles of polymers originate from organic chemistry

Getting Gooey With Slime Videos Sweeping the world’s social media’s news feed comes quite a sticky uprising trend. From all over the globe, teenagers have fallen in love with gooey, slippery, colorful slime videos. People sticking their fingers in a colorful goo has grabbed the media's attention and is now one of the most popular trends of the internet! Everyone’s favorite childhood toy has made an enormous comeback and is now on market with new creative names and colors. Slime videos are now one

Nanotechnology, which is one of the new technologies, is the science and technology of designing, constructing and creating of novel nano-scale structure, 1nm to 100 nm in size, with huger quality, novel performance properties, along with fewer defects compared with those of the bulk material (Siqueira et al., 2010). An increasing interest from the scientific community to work with materials in nano metric scale has been observed since the introduction of the concept of nanotechnology by Richard

3.2 Chemistry of chitin Similar to its polysaccharide nature, Chitin has a similar chemical structure as that of cellulose. It is reported to be a polymer with high molecular weight of N-acetyl-D-glucosamine units which are linked by β-D bonds, which has 1000-3000 units (Shahidi & Abuzaytoun 2005). In similarity with cellulose, chitin has an acetamido group at its C2 postion unlike cellulose which has a hydroxyl group (Shahidi & Abuzaytoun 2005). Figure 1 shows the structure of chitin, its derivative

are organic polymers. In 1600 BC, Mesoamericans used natural rubber for balls, bands, and figurines. In 1839, Charles Goodyear discovered a process in which sulfur reacted with crude rubber when heated and then cooled. The rubber became resilient upon cooling, it could stretch, but it snapped back to its original shape. It also retained its flexibility when heated. We now know that the sulfur forms chemical bonds between adjacent rubber polymer strands. The bonds cross-link the polymer strands, allowing

Monomer and end capper was synthesized according to known literature procedures [10,11]. The conjugated polymer with two side-chain thiol groups was also synthesized by nickel mediated polymerization method [12,13]. A schematic representation of the synthesis of monomer, end capper, polymer was shown in Scheme 2. 2.2.1. 2,7-Dibromo-9H-fluorene (1) Fluorine (300.8 mmol, 50.0 g) and CHCl3 (450 mL) was taken in the 1 liter round-bottom flask, wrapped with aluminum foil. The solution was cooled to 0

Methods: Polyamino-ether was obtained from the collaborator Dr. Kaushal Rege lab in Arizona state University. All other chemicals were obtained from Sigma-Aldrich (St. Louis, MO). 2.2.1 Synthesis of the bioreducible modified-PAE: The obtained PAE polymer was synthesized by reacting neomycin with glycidyl ether at molar ratio of 1:2 as reported in detail by Rege et al. previously[14]. The modified bioreducible PAE(mPAE) was synthesized by a simple one step reaction with Traut’s reagent as described