HIGH POLYMER

May 6 • General • 1617 Views • 2 Comments on HIGH POLYMER

HIGH POLYMER

  • High Polymers are formed by polymerization of monomers.
  • A high polymer is chemically described by its degree of polymerisation, molar mass distribution, tacticity, copolymer distribution, the degree of branching.
  • High Polymers in solution have special characteristics with respect to solubility, viscosity and gelation.

FLOW SHEET MANUFACTURING DIAGRAM OF NYLON IN   HIGH POLYMER

  • Polyamides or nylons are the first engineering plastics and still represent the biggest and most important class of these types of material.
  • The original “nylon” which was conducted by Wallace H. Carothers in a DuPont Laboratory in 1935.
  • commercially important polyamide, nylon 6 based on caprolactam was first produced at IG Farbenindustrie in Germany by P. Schlack in 1938
  • Nylon 6 and nylon 6,6 continue to be the most popular types among polyamide commercial.
  • Two basic reactions are used to synthesize polyamide engineering polymers are :- polycondensation of a dibasic acid and a diamine or
    polymerization of an amino acid or lactam
  • Major properties such as resistance to chemicals, toughness, thermal stability, good appearance, and good processability are key considerations that make nylon suitable for engineering plastics applications.
  • nylon 6 has better toughness and processability.
  •   On the other hand, nylon 6,6 has superior mechanical properties and higher heat resistance.

CHEMISTRY OF HIGH POLYMER

  • Nylon 6 is the linear addition polymer of caprolactam (6-amino-caproic acid).
  • The polymerization process for nylon 6 can be batch or continuous.
  • Three reversible reactions,ie, hydrolysis, polycondensation, and polyaddition are the main steps in nylon 6 production.
  • The first step is a hydrolysis reaction to open the caprolactam ring, forming ε-aminocaproic acid

IMPORTANT QUESTION

Q.1 What do you mean by high polymer?

ANS/ High Polymers are formed by polymerization of monomers.

  • A high polymer is chemically described by its degree of polymerisation, molar mass distribution, tacticity, copolymer distribution, the degree of branching.
  • High Polymers in solution have special characteristics with respect to solubility, viscosity and gelation.

Q2 Describe the flow sheet diagram of nylon ?

ANS/

  •  Polyamides or nylons are the first engineering plastics and still represent the biggest and most important class of these types of material.
  • The original “nylon” which was conducted by Wallace H. Carothers in a DuPont Laboratory in 1935.
  •  commercially important polyamide, nylon 6 based on caprolactam was first produced at IG Farbenindustrie in Germany by P. Schlack in 1938
  •  Nylon 6 and nylon 6,6 continue to be the most popular types among polyamide commercial.
  • Two basic reactions are used to synthesize polyamide engineering polymers are :-

(1) polycondensation of a dibasic acid and a diamine or

(2) polymerization of an amino acid or lactam

  • Major properties such as resistance to chemicals, toughness, thermal stability, good appearance, and good processability are key considerations that make nylon suitable for engineering plastics applications.
  • nylon 6 has better toughness and processability.
  •   On the other hand, nylon 6,6 has superior mechanical properties and higher heat resistance.

 

Tell us Your Queries, Suggestions and Feedback

Your email address will not be published.

2 Responses to HIGH POLYMER

  1. Rachita Mishra says:

    This is a good article where about high polymer is described…

  2. Ritika Savita says:

    High Polymer finds extensive use, nowadays. This article explains the manufacturing & oher aspects of this polymer.

« »