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化学学报
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化学学报 ›› 1956, Vol. 22 ›› Issue (4): 249-258. 上一篇    下一篇

论文

丁苯橡膠的分子量

錢人元, 秦汶, 程鎔時   

  1. 中国科学院应用化学研究所
  • 投稿日期:1956-03-10 发布日期:2013-06-04

THE MOLECULAR WEIGHT OF BUTADIENE-STYRENE COPOLYMER

CHIEN JEN-YUAN, CHING WEN, CHENG YUNG-SHIN   

  1. Institute of Applied Chemistry, Academia Sinica
  • Received:1956-03-10 Published:2013-06-04

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460

被引次数

19

1.本文叙述所用渗透计及测定方法,在实验技术方面,討論半透膜對溶剂的透过性在使用中的變化,和在渗透计上半透膜在测定进行中可能有的变形.2.又曾用九個丁苯橡膠级份的甲苯溶液在25°時作了渗透壓测定,得到的数據π/C对C是非線性的,但是可用(π/C)1/2對C作线性外推,得到Mn和A2的数值,且A2Mn/[η]为一常数.

The molecular weights of nine fractionated samples of butadiene-styrene copolymer were determined osmometrically in toluene at 25°.Experimental technique for the use of osmometer and the swelling of cellophane membrane in 5-30 pct NaOH solutions have been described.The change of permeability during repeated use of the membrane and its possible deformation during a determination were discussed.