Barannikov M.V.

INVESTIGATION OF THERMAL PROCESSES OCCURING AT HEATING OF CAPROLACTAM SOLUTIONS AND ITS CYCLIC OLIGOMERS...

INVESTIGATION OF THERMAL PROCESSES OCCURING at HEATING OF CAPROLACTAM SOLUTIONS AND its CYCLIC OLIGOMERS IN AMORPHOUS areas OF POLYAMIDE-6

Samples of caprolactam and polyamide-6 granules of different composition prepared by drying methods, sublimation and extraction were investigated by thermogravimetry and differential scanning calorimetry. The temperature range for the process of de-monomerization-drying of polyamide-6 granules was determined on the basis of the thermogravimetry and differential scanning calorimetry data of submitted samples.

Key words: polyamide-6, caprolactam, oligomers

REFERENCES
1. Klare G, Fritzsche E, Grebe F. Synthetic polyamide fibers. M.: Mir. 1966. 683 p. (in Russian).
2. Radionov V.A., Platonov E.K. Trudy VNIIMSV. 1966. N 1. P. 15-21 (in Russian).
3. Kolchinskaya L.M., Fishman K.E. Khim. Volokna. 1970. N 2. P. 69-72 (in Russian).
4. Kuzina E.F. Khim. Volokna. 1966. N 3. P. 30-32 (in Russian).

2016, Т. 59, № 7, Стр. 47-50

нет

CHANGING SOME PA-6 PROPERTIES AT ITS SYNTHESIS BELOW MELTING POINT

This paper presents the fractionation of PA-6 obtained at temperature below its melting point. Unfractionated samples and polymer fractions were studied by viscosimetry, thermogravimetry (TG, DTG) and differential scanning calorimetry (DTA). It was shown that at the first step of synthesis the polymer is formed with a predominantly linear structure and high parameters of thermal properties. At the second synthesis step the molecular weight of the polymer and its thermal properties increase and subsequent demonomerization-drying is accompanied by a further increase in the polyamide molecular weight.

Key words: polyamide-6 (PA-6), polymer solutions, PA-6 molecular weight determination, PA-6 preparation

2016, Т. 59, № 4, Стр. 63-67
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