Compositions of Arylalicyclic Copolyimide with Alkylated Monthmorillonite
Affiliation:
1 JSC "Institute of chemical sciences after A.B. Bekturov"
106 Sh. Valikhanov St., Almaty 050010, the Republic of Kazakhstan
jumadilovtalkybek@gmail.com
DOI:
https://doi.org/10.23939/chcht17.03.601
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Keywords:
Abstract:
The results of studies on the preparation and study of the properties of composite materials based on compositions of arylalicyclic copolyimide and alkylated montmorillonite (AMM) modified with polyethylene glycol to increase the affinity of a natural mineral to polymer matrix are presented in the work. It was found that an increase in the compatibility of composition’s components is due to the addition to copolyimide solution of previously prepared mixture of alkylated montmorillonite in 5 % and 2 % polyethylene glycol solution in methylpyrrolidone. Based on IR-spectroscopy of the obtained mixtures and literature data, an assumption about specified composition mechanism was made. Compounds of copolyimide compositions with modified montmorillonite were determined. Found that the total content of alkylated montmorillonite and polyethylene glycol should not exceed 12.5 wt. % in the case of copolyimide – 1 wt. % and in case of copolyimide-2 – 4 wt. %. The optimal conditions for obtaining on their basis transparent composite films with a smooth surface by a mechanical mixing method are found. Their basic thermodestructive and mechanical properties were determined. It was shown that the materials have high thermodestructive and strength properties: the temperature of decomposition onset is 409-421°C, the tensile strength is in the range of 140-168 MPa. The best thermodestructive properties and tensile strength are possessed by films obtained from ternary mixtures of the initial composition 87.5 SPI1 + 7 PEG + 5.5 AMM and 97 SPI2 + 2 PEG + 1 AMM, while the elasticity of the material remained at an acceptable level.
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