When polymers are recycled, the ends of the long chain polymer molecules tend to break off, and this process eventually results in a degradation of physical properties, rendering the cycled polymer unusable. Why the breaking off the end of the polymer molecules is favorable from the stand point of the entropy of the system is needs to be explained. Concept introduction: Entropy is explained as degree of randomness in a system. If there are more number of molecules more will be the entropy. In polymerization , monomers combined to form polymer, thus, molecules are in more ordered form and entropy of system decreases. Opposite to this, if polymers are recycled, due to breaking of long chains of polymer, molecules are no more in ordered form. Hence, entropy increases.
When polymers are recycled, the ends of the long chain polymer molecules tend to break off, and this process eventually results in a degradation of physical properties, rendering the cycled polymer unusable. Why the breaking off the end of the polymer molecules is favorable from the stand point of the entropy of the system is needs to be explained. Concept introduction: Entropy is explained as degree of randomness in a system. If there are more number of molecules more will be the entropy. In polymerization , monomers combined to form polymer, thus, molecules are in more ordered form and entropy of system decreases. Opposite to this, if polymers are recycled, due to breaking of long chains of polymer, molecules are no more in ordered form. Hence, entropy increases.
Solution Summary: The author explains that when polymers are recycled, the ends of the long chain polymer molecules tend to break off, and this process eventually results in a degradation of physical properties.
Definition Definition Chemical process in which one or more monomers combine to produce a very large chain-like molecule called a polymer. The functional groups present on the monomers and their steric effects are responsible for polymerization through a sequence of reactions that vary in complexity. There exists a stable covalent chemical bond between monomers that sets apart polymerization from other processes.
Chapter 10, Problem 10.65PAE
Interpretation Introduction
Interpretation:
When polymers are recycled, the ends of the long chain polymer molecules tend to break off, and this process eventually results in a degradation of physical properties, rendering the cycled polymer unusable. Why the breaking off the end of the polymer molecules is favorable from the stand point of the entropy of the system is needs to be explained.
Concept introduction:
Entropy is explained as degree of randomness in a system. If there are more number of molecules more will be the entropy. In polymerization, monomers combined to form polymer, thus, molecules are in more ordered form and entropy of system decreases. Opposite to this, if polymers are recycled, due to breaking of long chains of polymer, molecules are no more in ordered form. Hence, entropy increases.
Draw the product of the reaction
shown below. Ignore inorganic
byproducts.
H
conc. HBr
Drawing
Q
Calculate the atomic packing factor of diamond knowing that the number of Si atoms per cm3 is 2.66·1022 and that the atomic radii of silicon and oxygen are, respectively, 0.038 and 0.117 nm.
Chapter 10 Solutions
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