For example, a supplier of polycarbonate may have flame resistant grades, glass fiber reinforced grades, a conductive grade, and easy flowing grades. Wide and skewed distributions result significant variance in properties. Narrow distributions are more consistent. The number of atoms can range from two to millions. A molecule is the smallest unit of a substance which still retains the properties of that substance.
Monomers are generally gases or liguids.
When bonded together in long chains they form solid materials or polymers. Organic infers some relationship to materials which at some point in time were alive. Many materials, such as glass, become plastic under the right conditions. The process or chemical reaction by which low molecular weight monomers are converted to high molecular weight polymers. Stress cracking generally initiates with microscopic surface cracks causes by chemical attack or other degrading agent such as ultraviolet radiation.