Understanding polymers essay

applications of polymers ppt

These properties in turn, determine gel formation dynamics, cross-linking density, and material mechanical and degradation properties Jeanie and David, ; Armentano et al. The result was neoprene, which he created by adding a chlorine atom to an acetylene derivative. Another familiar isoprene polymer is rubber.

uses of polymers in chemistry

The nucleic acids carry genetic information in the cell. The chemist Hermann Staudinger first proposed that polymers consisted of long chains of atoms held together by covalent bondswhich he called macromolecules.

Understanding polymers essay

They include high performance polymers which are more resistant to high temperatures, possess greater moduli or strengths, and can be combined with additives to enhance their intrinsic properties yet further. My goal was to find out what makes PET the number one plastic, both in consumption as well as the most recycled. It is not necessary, in the present context, to keep track of all of these substances, which in any case represent just some of the more prominent among a wide variety of synthetic monomers. Throughout these developments, chemists had only a vague understanding of polymers, but by the s, they had come to accept the model of polymers as large, flexible, chain-like molecules. His work expanded the chemical understanding of polymers and was followed by an expansion of the field of polymer chemistry during which such polymeric materials as neoprene, nylon and polyester were invented. Stephanie Kwolek developed an aramid , or aromatic nylon named Kevlar , patented in During the s, clothes of polyester became fashionable, but by the early s, there was a public backlash against synthetics, and in favor of natural materials. D program in chemistry. Chong Cheng — innovative new materials that will outperform the ones used in current devices. A handful of polymers, such as natural sand or synthetic silicone oils and rubbers, are built around silicon. Another alkene hydrocarbon monomer is butadiene, whose formula is C4H6.

So some compromise between design for function and design for manufacture must be planned in order to maximise and exploit the extra design freedom that polymers offer. I also searched for new polymers that are being created by scientists and compare them to PET to see if there was a plastic out there that is better for the environment Carbon is noted for its ability to form double bonds, as for instance in many hydrocarbons.

Polyaniline in its emeraldine salt form contains alternating block copolymer of benzenoid and quinoid units 1, 4 bonding or para bonding and an even oxidation state with equal proportion of benzenoid and quinoid units.

A handful of polymers, such as natural sand or synthetic silicone oils and rubbers, are built around silicon. They have the efficiency for enhancing both the viscosity and the stability of emulsion depend on the polymeric concentration and structure [3] During World War IIall nylon went into making war materials such as parachutes, and nylon did not become commercially available again until I also wanted to understand its uses and possible uses in everyday life.

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Polymer chemistry