섬유

circular dichroism and excition effect of syndiotactic methacrylic polymers with chiral diacyl hydrazide side chains v number of exciton coupled monomeric units

  • 출판일1999.03
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 253
conformational order has been found in aqueous solution of tactic vinyl polymers derived from syndiotactic poly(methacrylic acid hydrazide). the cd (circular dichroism) spectra of poly(methacrylic acid-n** $beta$ @(l-lactoyl)hydrazide) and poly(methacrylic acid-n** $beta$ @(n-tert-butyloxy-carbonyl-l-seryl) hydrazide) were studied in their deprotonated state, i. e. , when containing diacyl hydrazide anion moieties. the experimental spectral traces were divided by a graphical subtraction procedure into an exciton doublet, representing monomeric units in conformational order, and cotton effects due to monomeric units without such order. the resulting probabilities were used as a basis for a simulation procedure, carried out manually and by computer. the simulation yielded an estimate of the sequence statistics of ordered and unordered monomeric units in the polymer chain. (author abstract). 7 refs
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