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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M_n和A_2的数值,且A_2M_n/[η]为一常数。 3.從粘度及渗透壓数據,得到: [η]=1.25×10~(-4)M~(0.78)分升/克(甲苯溶液,30°)所得a值较前人测定的为高,并在文中加以詮釋。
1. This article describes the osmometer used and the method of determination. In the field of experimental techniques, we discuss the changes in the permeability of the semipermeable membrane to solvents and the possible changes in the semipermeable membrane on the osmometer. 2. Also used nine styrene-butadiene rubber grade toluene solution at 25 ° for the osmotic pressure measurement, the data obtained π / C is non-linear C, but available (π / C) ~ (1/2 ) Linear extrapolation of C, the value of M_n and A_2, and A_2M_n / [η] is a constant. 3. From the viscosity and osmotic pressure data, we get: [η] = 1.25 × 10 -4 M ~ 0.78 dl / g (toluene solution, 30 °) The obtained a value is higher than the predecessor’s determination , And in the text to be interpreted.