So they can be better men. Traditionally, people undergo a bit of self-examination when faced with a potentially fatal rupture in their long-term relationship. Thirty-two-year-old Henry* admits that what he did was a little more extreme.
This interest is due to the rediscovery of high electrical conductivity. Amongst the family of conducting polymers and organic semiconductors, polyaniline has many attractive processing properties. Because of its rich chemistry, polyaniline is one of the most studied conducting polymers of the past 50 years.he emeraldine (n = m = 0.5) form of polyaniline, often referred to as emeraldine base (EB), is neutral, if doped (protonated) it is called emeraldine salt (ES), with the imine nitrogens protonated by an acid. Protonation helps to delocalize the otherwise trapped diiminoquinone-diaminobenzene state.
Polyurethane. Polyurethanes are linear polymers that have a molecular backbone containing carbamate groups (-NHCO2). These groups, called urethane, are produced through a chemical reaction between a diisocyanate and a polyol. First developed in late 1930s, polyurethanes are some of the most versatile polymers.They are used in building insulation, surface coatings, adhesives, solid plastics, and athletic apparel.olyurethanes are characterized by carbamate groups (-NHCO 2) in their molecular backbone. Synthetic polymers, like polyurethane, are produced by reacting monomers in a reaction vessel. In order to produce polyurethane, a stepâalso known as condensationâreaction is performed.