The LINEAR and CROSS-LINKED polyesters you made have somewhat DIFFERENT physical

Question

The LINEAR and CROSS-LINKED polyesters you made have somewhat DIFFERENT physical properties. BRIEFLY summarize the main difference in their physical properties (1 sentence maximum), AND, give a brief explanation for this difference in terms of the factors discussed earlier in this packet (1 sentence maximum). You synthesized nylon 6, 6, where the numbers 6 refers to the number of carbon atoms in the two precursors, the FIRST 6 refers to the number of carbons in the di-acid chloride, and the SECOND 6 refers to the number of carbons in the di-amine. Different nylons with different physical properties can be made with precursors with different numbers of carbon atoms. What would the name of the nylon shown below be? Addition polymers are formed when multiple monomers add to each other to build a long chain. Condensation polymers form when multiple monomers condense, with the elimination of a small molecule. One way that different types of polymer can be distinguished is simply to ask if all of the atoms in the monomer(s) appear in the polymer. If some atoms are lost then the polymer is not a condensation type polymer. Polyurethanes are widely used in the form of a foam in furniture, bedding etc. There are different kinds of polyurethane, one is shown below. Is the one shown below a condensation polymer, and why or why not??

Explanation / Answer

1.

Cross-linked polyesters are much stronger, more stable and have higher melting point than linear polyesters.

Cross-linked polymers form covalent bonds that are much stronger than the intermolecular forces that attract other polymer chains in case of linear polymers.

2.

No. of carbons in di-acid chloride = 8

No. of carbons in diamine = 6

Polymer formed is Nylon 8,6

4.

It is not a condensation polymer because there is no elimination of a small molecule. The overall reaction is balanced.

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.