Exam 21: Fibers, Paints, and Other Polymers

The two major methods to analyze the chemical composition of fibers are

Which of the following is not one of the characteristics of fiber morphology are

Unlike glass, fibers exhibit no properties of a refractive index.

Paints must be pyrolyzed if they are to be chromatographed.

The majority of cars have ______ coats of paint.

The repeating units in polymers are called monomers.

Organic substances in fibers that absorb visible light are called

The method for measuring the diameter of a fiber depends on its shape.

Paint evidence come is the form of

Once extracted from a fiber, a dye is normally analyzed by thin layer chromatography.

Fibers are class evidence, not individual evidence, with the exception of

Paints and fibers contain polymers.

Fiber morphology looks at the ______ of the fiber.

The most important characteristic of paint evidence is color layer sequence.

The basic types of paints, in regard to use, include

Fibers almost never contain a polymer backbone, but normally do contain one or more dyes or pigments.

Paint smears are easier to analyze than paint chips.

No amount of testing will individualize a fiber to a particular piece of fabric in the absence of a tear match.

Materials that have very short repeating molecular units are known as polymers.

Fibers that come from a plant or animal origin as classified as