Superabsorbent polymer

2.1 Polydimethylsiloxane (PDMS) Polydimethylsiloxane (PDMS) own to a group of polymeric organosilicon compounds that are commonly stated as silicones. PDMS is optically clear, and, in general, non-flammable, non-toxic, and inert. PDMS is viscoelastic, meaning that at long flow times (or high temperatures), it acts like a viscous liquid such as honey. However, at short flow times (or low temperatures), it acts like an elastic solid such as rubber. In other words, PDMS will flow to cover the…

(Polyether ether Ketone): This is a transparent thermoplastic polymer used mainly in engineering…

used material for packaging in almost every industry. The word ‘plastic’ comes from the Greek plastikos which means easily shaped (Robertson, 2013). Plastic is the combination of many molecules that linked together as one long chain which made from polymers: poly (Greek) means many and meros (Greek) means part (Robertson, 2013). Raw materials of plastic are called feedstock which come from natural and synthetic resources, such as crude oil, natural gas, coal, cellulose, starch and proteins…

Spinning of Nylon Fiber: The turning of the nylon filaments is completed with dissolve turning. There are two strategies for liquefy turning: 1. Grid turning 2. Extruder turning. Lattice turning is utilized for the generation of better fibers. The nylon chips are made to fall on a hot matrix that melts the nylon pieces. The liquid nylon is pumped through a sand channel to the spinneret. The sort of fiber created relies on the quantity of gaps on the spinneret, the size and the state of the…

Important aspects for polymers and conjugated drugs A choice of anticancer drugs have been conjugated with polymers, including anthracycline antibiotics, antimetabolites, platinum analogues, alkylating agents, as well as peptides, proteins and enzymes (Meng, and El-Deiry, 2002). The main requirement for a candidate drug in this field is the drug minimum effective concentration. For example, if the minimum effective concentration needs to be ~10 '3 M for a drug with a molecular weight of -50 kDa,…

MPa,[13] and a relative density of 1.44. The polymer owes its high strength to the many inter-chain bonds. These inter-molecular hydrogen bonds form between the carbonyl groups and NH centers. Additional strength is derived from aromatic stacking interactions between adjacent strands. These interactions have a greater influence on Kevlar than the van der Waals interactions and chain length that typically influence the properties of other synthetic polymers and fibers such as Dyneema. The…

of the four macromolecules. Carbon's molecular structure allows it to bond in many different ways and with many different elements. A Monomer is an atom or small molecule that may bind chemically to other monomers to form a Polymer Different monomers make up a polymer. Polymers combine to make a molecule, and molecules combine to make macromolecules. Carbohydrates Carbohydrates are molecular compounds made from just three elements: carbon, hydrogen and oxygen, usually in a ratio of 1:2:1.…

Reservoir Systems consist of a hollow inner core and a polymer membrane, there to control the rate of drug diffusion. Drug diffusion across the membrane is rate limited and controls general drug release rate (Bajpai et al. 2008). For reservoir systems drug release normally remains steady resulting in a zero order profile (Raval, Parikh and Engineer, 2010). Another technology is called the Multiparticulate drug delivery system which consists of microencapsulated granules/beads containing drug…

long side chains, Biopol is also flexible. As a result of adding PHV, the polymer gains a lower melting point, lower crystallinity, more elongation, as well as an overall higher tensile strength. Generally, Biopol is a stable polymer, being resistant to water,…

Substituted Cyclo pentene and Cyclo hexanes using different catalyst Introduction:- Polymer is a word which is derived from Greek words “poly” which means many and “mer” which means parts. Polymers are substances which have large number of repeating structural units repeated in the same type of linkage. The chemistry that deals about polymers is called polymer chemistry and the reaction is called as polymerization. Polymer chemistry have a wide range of application in day to day life and the…