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Acta Chimica Sinica ›› 1955, Vol. 21 ›› Issue (1): 50-62. Previous Articles     Next Articles

聚已内醯胺的特性粘数

钱人元, 施良和, 史觀一   

  1. 中国科学院有机化学研究所
  • 投稿日期:1954-12-02 发布日期:2013-06-04

THE INTRINSIC VISCOSITIES OF POLYCAPROLACTAM

CHIEN JEN-YUAN, SHIH LIANG-Ho, SHIH KWAN-I   

  1. Institute of Organic Chemistry, Academia Sinica
  • Received:1954-12-02 Published:2013-06-04

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A water-extracted polycaprolactam sample was fractionated from a 2% solution in 85% formic acid at 25℃, water being used as precipitant. Cacboxyl end-group titration and viscosity measurements in 40% H2SO4 at 25℃ were carried out for the fractions obtained.