Answer:
Step-by-step explanation:
Here, we want to explain the factors responsible for the differences in the polymers presented
We proceed as follows:
a) High melting Point
Although the two polymers contain carbon and hydrogen atoms only, the presence of hydrogen bonding in Polymer Y may lead to it having a high melting point compared to Z.
Other factors that can cause this include the presence of double bonds, aromatic groups or the availability of bulky side groups or branches in the polymer molecule Y.
These and more are responsible for the differences
b) Rigidity and Flexibility
This is due to the existence of some degree of rotation around the atoms' valency. Polymer Z would be flexible due to this.
The absence of this in Polymer Y will make this a difficulty
c) Stretching
How entangled the chain of the polymers are could be responsible for the stretching of the polymers. Since polymer Z is easily stretched, there would be a low degree of entanglement in its chain compared to polymer Y.