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The amide link is produced from the condensation reaction of an amino group and a carboxylic acid or acid chloride group. A small molecule, usually water, or hydrogen chloride, is eliminated.
The amino group and the carboxylic acid group can be on the same monomer, or the polymer can be constituted of two different bifunctional monomers, one with two amino groups, the other with two carboxylic acid or acid chloride groups.
Amino acids can be taken as examples of single monomer (if the difference between R groups is ignored) reacting with identical molecules to form a polyamide:
The reaction of two amino acids. Many of these reactions produce long chain proteins
Aramid (pictured below) is made from two different monomers which continuously alternate to form the polymer and is an aromatic polyamide:
The reaction of 1,4-phenyl-diamine (para-phenylenediamine) and terephthaloyl chloride to produce Aramid
What else can I help you with?
Which polymer is used in bullet proof?
Polyethylene is commonly used in bulletproof vests due to its high strength and energy absorption properties. It is lightweight and flexible, making it comfortable for wearers while still providing effective protection against ballistic threats.
What is nomex made of?
Nomex is a flame-resistant meta-aramid material that is made from aromatic polyamides. It is engineered to have high thermal stability and outstanding flame resistance, making it suitable for protective clothing worn by firefighters, race car drivers, and others in high-risk environments.
Which chemical group does nylon belong to?
Nylon is an: - organic material - a polymer (formed from macromolecules) - a plastic material - a synthetic material
Why is polyamide stronger than polyethylene?
Polyamide has a more organized molecular structure with stronger intermolecular forces, leading to higher strength compared to polyethylene, which has a more random molecular structure with weaker intermolecular forces. Additionally, the presence of amide bonds in polyamide adds to its strength by forming a network of strong covalent bonds.
Does ripstop nylon contain chemicals?
Nylon one of the most used polymers, is a generic designation for a family of synthetic polymers known generically as polyamides and first produced on February 28, 1935 by Wallace Carothers at DuPont.
How many absorption bands are in uv spectrum for azo polyamides?
Azo polyamides typically exhibit absorption bands in the UV spectrum due to the presence of azo groups. The exact number of absorption bands can vary depending on the specific chemical structure of the polymer and the environment. Typically, azo polyamides show absorption bands in the range of 300-400 nm.
What has the author G Ghous written?
G. Ghous has written: 'Electrochemical synthesis of polyesters and polyamides'
What is the scientific name for nylon?
Nylon is a family of synthetic polymers. It is commonly known as aliphatic polyamides, or condensation copolymers.
What has the author John Edwin Pearson written?
John Edwin Pearson has written: 'Nuclear magnetic resonance studies of polyamides'
What has the author John A Tavender written?
John A. Tavender has written: 'The synthesis of fibre-forming polyamides containing a-amino acid residues'
What has the author Don Edgar Floyd written?
Don Edgar Floyd has written: 'Polyamide resins' -- subject(s): Plastics, Polyamides
Which polymer is used in bullet proof?
Polyethylene is commonly used in bulletproof vests due to its high strength and energy absorption properties. It is lightweight and flexible, making it comfortable for wearers while still providing effective protection against ballistic threats.
History of nylon fabric?
•Nylon is a generic d designation for a family of synthetic polymers known generically as polyamides. Which was first produced on February 28th 1935, by a man call Wallace Carothers. •
Is polymide the same thing as nylon?
Yes, polyamide is the generic name for a type of polymer that includes nylon as a specific type of polyamide. So while nylon is a type of polyamide, not all polyamides are nylon.
Where does polyamide come from?
Polyamide resin is made by cooking ethylene amines with dimer acid and Tall Oil Fatty acid or oleic acid. Water is removed by distillation. Various other additives may be used. HOOC-X-COOH + H2N-CH2CH2NH-CH2CH2NHCH2CH2NH ----------> [---OC-X-CO-HN-CH2CH2NH-CH2CH2NHCH2CH2NH-CO-X-CO-----]N + nH2O is the simplified schematic formula for synthesis.
What are polyamide advantages and disadvantages?
Polyamides, commonly known as nylons, offer several advantages, including high strength, durability, and excellent abrasion resistance, making them suitable for various applications like textiles and engineering components. They also have good thermal stability and chemical resistance. However, disadvantages include moisture absorption, which can affect dimensional stability and mechanical properties, as well as a tendency to degrade under UV exposure. Additionally, polyamides can be more expensive than some other synthetic fibers or materials.
Which fibers have ester units as their building blocks?
Polyester and polyamide fibers have ester units as their building blocks. Polyesters are formed by the condensation reaction of diols with dicarboxylic acids, while polyamides are formed by the condensation reaction of diamines with dicarboxylic acids.
