Strength-strain, barrier, thermal, and fire-resistance properties of nanocomposites based on linear polyethylene with montmorillonite
V. V. DolgovInstitute of Polymer Chemistry and Physics, Academy of Sciences of the Republic of Uzbekistan, Tashkent, UzbekistanN. R. AshurovInstitute of Polymer Chemistry and Physics, Academy of Sciences of the Republic of Uzbekistan, Tashkent, UzbekistanE. E. ShevelevaInstitute of Polymer Chemistry and Physics, Academy of Sciences of the Republic of Uzbekistan, Tashkent, UzbekistanE. O. KhakberdievInstitute of Polymer Chemistry and Physics, Academy of Sciences of the Republic of Uzbekistan, Tashkent, Uzbekistan
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Strength-strain, sorption, thermal, and fire-resistance properties of nanocomposites based on linear low-density polyethylene with montmorillonite modified with a quaternary phosphonium salt were studied. It is shown that the diffusion, sorption, and permeability of the nanocomposites depends on the type of a montmorillonite and its concentration in the polymer, and also on the nature of a penetrant and degree of its thermodynamic affinity for the polymer. Introduction of up to 3 wt % organomontmorillonite improves the thermal stability by more than 90°, raises the oxygen index to 20 vol %, and makes the elastic modulus 47% larger relative to the base polymer due to the nanostructural morphology formed in the course of mixing.
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