Does Stretching a Polymer Chain Affect Its Energy?

Therefore, the work done on the system is positive and the heat transfer is zero. In summary, when a rubber band consisting of n polymer chains is stretched from zero length to its full extension at constant temperature, the energy of the system remains the same. The work done on the system is positive and the heat transfer is zero.
  • #1
phunnyish
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A polymer model -- 15.4-3

Homework Statement



A rubber band consisting of n polymer chains is stretched from zero length to its full extension (L=Na) at constant temperature T. Does the energy of the system increase or decrease? Calculate the work done on the system and the heat transfer to the system.

Homework Equations



http://cvika.grimoar.cz/callen/callen_15.pdf



The Attempt at a Solution



Constant temperature --> internal energy does not change for this type of problem
 
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  • #2
, so the energy of the system remains the same. The work done on the system is equal to the change in potential energy, which is given by W = nNaU(L). The heat transfer to the system is equal to zero since there is no temperature change.
 

Related to Does Stretching a Polymer Chain Affect Its Energy?

1. What is a polymer model?

A polymer model is a representation or simulation of a polymer, which is a large molecule made up of repeating smaller units called monomers. This model can help us understand the structure, properties, and behavior of polymers.

2. How is the polymer model - 15.4-3 different from other polymer models?

The numbers in the name of the polymer model - 15.4-3 indicate the specific composition and arrangement of the monomers in the polymer. This makes it unique from other polymer models that may have different compositions and structures.

3. What are some real-world applications of the polymer model - 15.4-3?

The polymer model - 15.4-3 can be used in materials science and engineering to design and create new polymers with specific properties for various applications such as in plastics, coatings, adhesives, and biomedical devices.

4. How is the polymer model - 15.4-3 created?

The polymer model - 15.4-3 is created using computer simulations and molecular modeling techniques. Scientists input the specific composition and structure of the polymer into a software program, which then generates a 3D model of the polymer and simulates its behavior under different conditions.

5. What are the advantages of using the polymer model - 15.4-3 in research?

The polymer model - 15.4-3 allows scientists to study and predict the behavior of polymers without having to physically create and test them in the laboratory. This saves time and resources and also provides a deeper understanding of how polymers function, leading to potential advancements in various industries.

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