THE KINETICS AND MECHANISM OF THE SOLID STATE POLYMERIZATION OF ACRYLAMIDE

Journal Article · Thu Jan 01 04:00:00 EST 1959 · Makromolekueare Chemie (Switzerland)

DOI:https://doi.org/10.1002/macp.1959.020340109· OSTI ID:4169003

Morawetz, H; Fadner, T A

Crystalline acrylamide exposed to gamma rays polymerizes after removal from the irradiation source for periods of many months. The molecular weight of the product increases by about the same factor as the polymer yield. At 25 deg C, the initial propagation rate coefficient is 2.6 x 10/sup 6/ times lower than in water solution. The kinetics of the reaction are consistent with biomolecular radical termination and intermediate between those expected for a uniform radical distribution and the radical growth in isolated"tracks" of the gamma rays, but electron spin resonance measurements indicate little decay of the radical concentration with time. In solid solutions of acrylamide and propionamide, which is isomorphous with the monomer, the polymer chain length is determined by chain transfer to propionamide. The high chain transfer efficiency of propionamide in solid solution is indicative of the restraints imposed on the direction of the chain growth by lattice forces. There is no appreciable chain transfer in solid solutions of acrylamide containing the non-isomorphous acetamide as the second component. (auth)

• Research Organization: Polytechnic Inst., Brooklyn
• NSA Number: NSA-14-014802
• OSTI ID: 4169003
• Journal Information: Makromolekueare Chemie (Switzerland), Journal Name: Makromolekueare Chemie (Switzerland) Vol. Vol: 34; ISSN MACEA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ACETAMIDE
ACETIC ACID
ACRYLAMIDE
ACRYLIC ACID
AMIDES
CHEMISTRY
DISTRIBUTION
EFFICIENCY
ELECTRONS
FREE RADICALS
GAMMA RADIATION
IRRADIATION
LATTICES
MEASURED VALUES
MOLECULES
POLYMERIZATION
POLYMERS
PROPIONIC ACID
REACTION KINETICS
RESONANCE
SOLID SOLUTIONS
SOLUTIONS
SPIN
WATER
WEIGHT