A study of gelatin gelation by Fourier transform mechanical spectroscopy

摘要: Abstract This paper reports the results of experiments which were designed to test hypothesis that recording anomalous values rheological exponents in gelation gelatin may, under some circumstances, be due inappropriate rheometry. Results obtained from stress relaxation tests and oscillatory shear frequency sweeps are compared with time-resolved measurements based on Fourier Transform Mechanical Spectroscopy (FTMS) is used identify Gel Point. The reported herein involve concentrations temperatures result gel times range ca. 102–104 s, corresponding fast slow conditions elsewhere. Within this range, appropriately low sample mutation number our FTMS experiments, exponent α at Point found essentially independent temperature concentration, a value α ∼ 0.69. establish rheometrical rapid produces anomalously we conclude appearance values, can attributed procedures.