Abstract
A new Mark-Houwink equation for linear poly(ethylene imine) has been established in the molar mass range 2 × 10 3 < M w < 3 × 10 4 g mol −1 . The equation, resulting from viscosity measurements combined with weight-average molar mass determinations by light scattering in methanolic solution at 25°C, was found to be: [η] = (1.04 × 10 −2) M 0.95 w . The value of the exponent in the equation indicates the rigid structure of the polymer.
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