Which of the following is not polyamide?Select an answerANylon 6, 6BProteinCGlyptalDNylon-6

Step 1: Break Down the Problem

The question asks to identify which of the listed options is not a polyamide. The given options are:

1. Nylon 6,6
2. Protein
3. Glyptal
4. Nylon-6

Step 2: Relevant Concepts

Polyamides are a type of polymers characterized by the presence of amide links (-CONH-) in their molecular structure. Common examples include:

• Nylon 6,6: A synthetic polyamide made from hexamethylene diamine and adipic acid.
• Nylon-6: Another form of polyamide, made from caprolactam.
• Proteins: Natural polymers made from amino acids, which also contains amide bonds but are not classified as synthetic polyamides.
• Glyptal: A resin formed by the reaction of phthalic anhydride and glycerol that does not contain amide groups.

Step 3: Analysis and Detail

• Nylon 6, 6: Classic polyamide.
• Nylon-6: Also a polyamide.
• Protein: While proteins have amide bonds, they do not belong to the synthetic polyamide category.
• Glyptal: Is not a polyamide, as it does not have amide linkages.

Step 4: Verify and Summarize

Among the options provided, Glyptal is a resin and does not contain the amide linkages that define polyamides. Therefore, it is not categorized as a polyamide.

Final Answer

Glyptal is not a polyamide.