Synthesis Essay

My answer is (d) (8:06:24 PM) 4. Cellulose is made of multiple long polysaccharide chains that line up side by side in parallel. What keeps the cellulose molecules stuck together?

Many common objects were used to complete this experiment. Two beakers, one filled with 50 mL of water and one empty, were used as containment vessels. Three different types of paper towels were used to measure the absorbency. Scissors, ___, and ___ were used to help set up the experiment. An additional pipet was used to get exact measurements.

Experiment Title:How Dense Is This Substance? Name(s):Praventh. R Purpose: Is this liquid/substance greater than or less than 1g/mL? Will the liquid/substance be highly viscous or will it have a low viscosity?

The Borax and PVA were poured from their respective beakers into a smaller (100mL) beaker, and then the solutions were stirred together thoroughly. This was done for all the ratios. 20 mL of PVA and 2 mL of Borax were used for the 10:1 ratio; 10mL PVA and 2mL Borax for the 5:1. 12 mL PVA and 4mL Borax for the 3:1; and 10mL PVA and 5mL Borax for the 2:1 ratio.

PVA glue and borax is the structure of a standard slime. PVA in PVA glue stand for polyvinyl alcohol or polyvinyl acetate. PVA glue and borax are the structure of standard slime recipes because they are links and chains. PVA glue is a regular elmers glue that can be found in craft stores. When slime is made there is a chemical reaction.

Both natural and synthetic polymers are a vital part of our daily lives. Natural polymers are found in rubber, skin, hair etc. Synthetic polymers are found in nylon, polyester, plastic, chewing gum etc. This lab is demonstrating the properties of the common synthetic polymer polyvinyl alcohol (PVA). It is often used as a thickener or stabilizer cosmetics but also in paper cloths, films and cements.

In this lab, the following equipment were used to help measure the different values which in turn helped calculate the required properties of the different fluids:

Different compounds have different retention times, so when the GC of an unknown is compared to a known standard, the sample can be identified. In viscosity determination, the time it takes for a compound to flow from one mark to another in a pasteur pipette, is compared to the time it takes for another compound, which divided give the relative viscosity of the

Between all the given compounds are London dispersion forces, which are relatively weak, but for larger polymer molecules will

Over the course of my experimental procedure there were various changes I had to make in order to increase the validity of my experiment. One of the main variables that I realised I had to control was the presence of water droplets in the measuring cylinder when measuring viscosity and clarity. When washing the measuring cylinder after each trial it was difficult to thoroughly dry the measuring cylinder as it was narrow, this may have interfered with the clarity readings as the water droplets could have obscured what would’ve been a perfectly clear view of the secchi disk. The presence of water droplets in the measuring cylinder also may have interfered with the viscosity measurement as the water may have diluted the oil sample causing the ball’s velocity to increase as it reduced the liquid resistance.

I also chose four materials a disposal diaper, sponge, towel and t shirt to test my hypothesis. I cut up the materials (about 2 teaspoons) and place them in clear cups. I added the liquids to the material one teaspoon at a time to see which material would absorb the most liquid. The disposable diaper with cotton polymer absorbed the most out of the four materials.

[Emim]Br; (d) polymer + TMEAS and (d) polymer + TBMS 3. Materials and Methods 3.1 Materials All the chemicals and reagents required for the synthesis of the polymer and ILs were purchased from Aldrich Chemical Co. (USA). [Bmim]Br, [Emim]Br, and TBMS were purchased from Sigma-Aldrich. Moreover, all the chemicals and reagents were used without any further purification. The rest of the TEMS was synthesized in the

Contractibility- is the ability to shorten forcibly when adequately stimulated. This ability sets muscle apart from other tissue types.

Justification: (explain why you ranked them that way and what that means for the relative strength of electrical forces in each substance)

A basic understanding of polymerization processes is important not only because polymerization affects structure, and hence properties, but also because some processing routes can convert monomers directly to a finished shape. They offer manufacturing industry considerable benefits both in direct and indirect costs. An extra dimension to polymer structure is added by the possibilities of copolymerization, where two or more different monomers a re polymerized together. In one sense it is comparable to alloying different metals to produce an appropriate balance of properties in the final product. Two groups of polymerization are normally acclaimed. In condensation polymerization, each step of the process is accompanied by formation of a molecule of some simple compound, often water ( ). In addition polymerization, monomers react to from a polymer without the formation of by-products. Addition polymerization usually are carried out in the presence of catalysts, which in certain cases exert control over structural details that have important effects on the properties of the polymer. Linear polymers, which are composed of chainlike molecules, may be viscous liquids or solids with varying degrees of crystallinity; a number of them can