Polymer

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,…

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

Plastics are a material currently being used all around the world. As the production of this synthetic polymer has increased, it has become almost impossible to completely avoid interaction with a plastic material. With the discovery of this practical material, positives and negatives were discovered too. Plastics have a strong effect on the environment and human health. During manufacturing, additives are put in that can be harmful to each of these important aspects. Due to their synthetic…

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…

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…

understand polymers and how they are altered to get a specific product. Polymers are long chain molecules with repeating sequences of large atoms1. Polymers are important in the field of organic chemistry, because they can be changed to create different compounds used in everyday life. Polymers can be found in nature, such as starches, proteins, and cotton. They can also be man-made, such as plastics, Kevlar, and Teflon1. Polymers can be linear, branched, cross-linked, and network1. Polymer…

Thus its now more than 75 years silicone has been invented. Over these years Silicon has been tried and blended with various types of organic polymers. [Rachow E.G., 1987]. The few applications of silicones and its intermediate along with Siloxane-organic copolymer blends have been explained in this chapter. However Silicones intermediate or Silaxone-organic copolymers also have limitations in…

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,…

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…

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.…