polyacrylamide/polyacrylamide direct from zouping changshan

polyacrylamide/polyacrylamide direct from zouping changshan
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  • Why is polyacrylamide not a polyamide?
  • It can be viewed as polyethylene with amide substituents on alternating carbons. Unlike various nylons, polyacrylamide is not a polyamide because the amide groups are not in the polymer backbone. Owing to the presence of the amide (CONH 2) groups, alternating carbon atoms in the backbone are stereogenic (colloquially: chiral).
  • Is polyacrylamide contaminated with acrylamide?
  • Polyacrylamide is of low toxicity but its precursor acrylamide is a neurotoxin and carcinogen. Thus, concerns naturally center on the possibility that polyacrylamide is contaminated with acrylamide. Considerable effort is made to scavenge traces of acrylamide from the polymer intended for use near food.
  • Is polyacrylamide a capping agent for silver nanoparticle formation?
  • Polyacrylamide acted as a capping agent for the silver nanoparticle formation yielding smaller nanoparticles while uncontrolled growth and massive particles were observed without acrylamide for the same conditions.
  • Do acrylamide and polyacrylamide adsorb to silver particles?
  • This implies a nonsystematic adsorption of acrylamide and polyacrylamide to silver particle surfaces. Two conclusions may be drawn from the Raman spectra: (1) silver particles form on a much faster time scale than polymerization of acrylamide and (2) polymerization occurs at least in part at the surface of the silver particles.