섬유

Chlorination of Polyamides and Characteristics of the Chlorinated Polymers.

  • 출판일2000.08
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 232
Researchers studied the chlorination and dechlorination of nylon 66 and poly-m-phenyleneisophthalamide (PMPIPA). Chlorine analysis, infrared and deuterium neutron magnetic resonance spectroscopy, viscometry, and wide angle X-ray diffraction determined the chemical structures and properties of the chlorinated polymers. Nylon 66 chlorination involved reactions with tert-butylhypochlorite, and dechlorination involved reactions with sodium sulfite in formic acid. Similar reactions for PMPIPA involved tetrachloroethane for chlorination and dimethyl sufloxide/formic acid (1/1 by volume). Chlorine substitution occurred primarily at the amide groups of nylon 66 and at the amide groups and the benzene rings of PMPIPA. The crystalline structure of nylon 66 changed with chlorination and recovered with dechlorination, whereas that of PMPIPA disappeared with chlorination. 35 refs.
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