Сверхкритические флюиды. Теория и практика
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2015, N4, pp. 42-51

P.S. Timashev, N.N. Vorobieva, N.V. Minaev, Yu.A. Piskun, I.V. Vasilenko, S.G. Lakeev, S.V. Kostjuk, V.V. Lunin, V.N. Bagratashvili

Formation of Porous Matrixes from Lactide and ε-Caprolactone Copolymers in Supercritical Carbon Dioxide Medium

A series of lactide and ε-caprolactone copolymers containing 4—24 mol.% of ε-caprolactone with 20—30 kDa molecular weights is synthesized. Based on them porous materials are produced by foaming in supercritical carbon dioxide. At increasing ε-caprolactone content in copolymer the pore size decreases, while the porosity of the entire sample is not altered. The pore size also decreases if 7% wt. polyethylene glycol is added to the initial monomer mixture. The Young’s modulus of the porous samples decreases at increasing ε-caprolactone content and if polyethylene glycol is added.

Key words: polymer foaming, supercritical carbon dioxide, lactide and ε-caprolactone copolymers, mechanical characteristics of porous polymers

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