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Chapter 15: Problem 37

List two important characteristics for polymers that are to be used in fiber applications.

Short Answer

Expert verified
Answer: Strength and flexibility are two crucial characteristics for polymers used in fiber applications. Strength allows the polymer material to withstand mechanical stresses, while flexibility enables it to be spun into fibers and woven into various products.

Step by step solution

01

Characteristic 1: Strength

One crucial characteristic for polymers used in fiber applications is their strength. The polymer material must be strong enough to withstand the mechanical stresses encountered in the production process and during use to maintain its shape and integrity.
02

Characteristic 2: Flexibility

Another essential characteristic is flexibility. Polymers used in fiber applications need to be flexible enough to be spun into fibers and woven into textile materials without breaking or losing their properties. This flexibility allows for a greater range of applications, such as clothing, rope, and other products.

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Most popular questions from this chapter

On the basis of the curves in Figure \(15.5\), sketch schematic strain-time plots for the following polystyrene materials at the specified temperatures: (a) Crystalline at \(70^{\circ} \mathrm{C}\) (b) Amorphous at \(180^{\circ} \mathrm{C}\) (c) Crosslinked at \(180^{\circ} \mathrm{C}\) (d) Amorphous at \(100^{\circ} \mathrm{C}\).

Cite five important characteristics for polymers that are to be used in thin- film applications.

The vulcanization of polyisoprene is accomplished with sulfur atoms according to Equation 15.4. If \(57 \mathrm{wt} \%\) sulfur is combined with polyisoprene, how many crosslinks will be associated with each isoprene repeat unit if it is assumed that, on the average, six sulfur atoms participate in each crosslink?

Normal butane and isobutane have boiling temperatures of \(-0.5\) and \(-12.3^{\circ} \mathrm{C}\) (31.1 and \(\left.9.9^{\circ} \mathrm{F}\right)\), respectively. Briefly explain this behavior on the basis of their molecular structures, as presented in Section 14.2.

Ten kilograms of polybutadiene is vulcanized with \(4.8 \mathrm{~kg}\) sulfur. What fraction of the possible crosslink sites is bonded to sulfur crosslinks, assuming that, on the average, \(4.5\) sulfur atoms participate in each crosslink?
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