Physically, Poly (ether sulphone) appears as a semitransparent material (with transparency in the range of 76%) on account of its being amorphous. Being amorphous also gives it a higher dimensional stability as it does not shrink too much upon cooling. Poly (ether sulphone) is highly resistant to attack my chemical agents including but not limited to alkalis, acids and various concentrated electrolytes. Poly (ether sulphone) is stable under the pH range of 2 – 14. In addition, Poly (ether sulphone) is stable in oxidizing agents and various non-polar solvents.
INTRODUCTION Figure 1: Molecular Structure of PET PET (or PETE) is also known as polyethylene terephthalate or (C10H8O4)n. Its natural state is a colorless, semi-crystalline resin when combined with other materials like glass fiber or carbon nanotubes, it increases the material’s strength. Polyethylene terephthalate melts at 260°C and Amorphous density (at 25oC) is 1.33 g/cm3. PET can be produced by 2 different reactions as a product of polymerization. The first reaction is between ethylene glycol with terephthalic acid. The second one is the reaction of ethylene glycol with dimethyl terephthalate in acid catalyst.
This rare earth element is ductile because it has the ability to deform under tension. It is also malleable because it is able to be permanently pressed out of shape without cracking. Ytterbium has a Vickers Hardness of 0.206 gigapascals and a Brinell Hardness of 0.343 gigapascals
Sml2 and Ybl2 are easy to prepare and to handle. Generally reactions using these reagents are clean. In addition, the lanthanide metals and salts are not known to be toxic and are easily available materials.” Samarium Iodide began to be seen as an invaluable reagent for any chemist due to its versatility, its large reduction potential (up to -2.05 in the presence of HMPA) and its tolerance to many functional groups. It was this research that lead to SmI2 becoming used as a leading reducing agent in Organic
Insulation Aerogels, high-surface-area porous solids will be employed due to their light weight and low heat conduction to achieve optimal insulation of the Mars surface. Aerogels as a whole are made by creating a gel then extracting the solvent with supercritical fluid extraction. This leaves a very porous, low-density solid. Due to their porous nature, aerogels are considered to be the finest insulation materials available. Silica aerogels are good insulators, but will flake apart and produce dust in the Mars atmosphere.
Valenzuela et. al. (1995)  has proposed a hydrometallurgical procedure for the separation of molybdenum from Chilean molybdenite concentrate. The molybdenite concentrate was first leached with nitric acid originated from the reaction of NaNO3 and H2SO4, which provided a solid phase, composed of MoO3 and residual solution. Molybdenum was separated with alkylphosphonic acid PC-88A by solvent extraction method, from the leach liquor containing copper, rhenium and iron among other impurities.
As they are light and easy to roll up and transport, storage is not a problem. The panels can stand alone or be hung from an existing structure or fencing. They can be created to fit any project and will not perish. Echo Sound Barriers are a cost effective, low maintenance, easy to erect solution to any sound problem created by a
5.2. POVIDONE78, 79: Nonproprietary Names: BP: Povidone, USP: Povidone Synonyms: E1201; Kollidon; Plasdone; poly[1-(2-oxo-1-pyrrolidinyl)ethylene]; polyvidone; polyvinylpyrrolidone; PVP; 1-vinyl-2-pyrrolidinone polymer. Chemical Name and CAS Registry Number: 1-Ethenyl-2-pyrrolidinone homopolymer [9003-39-8] Empirical Formula and Molecular Weight: (C6H9NO)n 2500–3 000 000 The USP 28 describes povidone as a synthetic polymer consisting essentially of linear 1- vinyl-2-pyrrolidinone groups, the differing degree of polymerization of which results in polymers of various molecular weights. Structural Formula: Functional Category: Disintegrant; dissolution aid; suspending agent; tablet binder. Applications in Pharmaceutical Formulation or Technology:
The synthesis was carried out in an aqueous medium by microwaves using olibanum gum (Boswellia serrate) as a reducing and stabilizing agent without using any harsh, synthetic reducing agents. The greener synthesis of olibanum gum capped AuNPs was found to be eco-friendly due to the utilization of renewable plant material. The amount of gum and irradiation time effect the formation of NPs. Microwave irradiation can accelerate the formation of NPs and as the concentration of gum increases, the particle size decrease. The designed olibanum gum capped AuNPs are highly stable, and have shown effective catalyst in the reduction of 4-NP to 4-AP and electron transfer reaction between K3[Fe(CN)6] and NaBH4.
Stability and Storage conditions: Stable when stored at room temperature and dispersions are stable up to 1 year after manufacturing and stored at room temperature (RT) in tight containers. Incompatibilities: Acid and/alkalies Applications: Film coating of tablets which are resistant to gastric fluids. 4. POLYVINYL ALCOHOL  Description: It is a synthetic polymer which is water soluble and has excellent film forming adhesive and emulsifying properties. Solubility: Soluble in water (H2O) and insoluble in organic solvents like