MODIFICATION OF EPOXY-AMINE POLYMERS BY OLIGOHEXAMETHYLENEGUANIDINES

Methods of introducing a water-soluble biocide modifier, oligohexamethyleneguanidine hydrochloride, into epoxy-amine systems were studied. The obvious way is the introduction of the modifier in the waterborne epoxy-amine systems. However, this leads to cured systems with reduced mechanical properties. Introduction of oligohexamethyleneguanidine hydrochloride solutions in organic solvents into epoxy-amine systems allows obtaining a homogeneous system, but their application is limited by the presence of a volatile solvent. Finally, introduction of oligohexamethyleneguanidine hydrochloride solutions in a water-soluble amine curing agent into epoxy-amine systems has good prospects. It is shown that the analyzed modifier has good solubility in ethylenediamine, but poor solubility in oligooxypropylenediamine. It was found that the modifier is capable of interacting chemically with epoxy resins at 22°C to form an elastic insoluble material. In an epoxy-amine system with a more active hardener (ethylenediamine) oligohexamethyleneguanidine hydrochloride acts as a plastifier (flexibilizer). This significantly reduces the glass transition temperature of the matrix (from 53 to 37ºC).

diamine, epoxy resin, oligohexamethyleneguanidine, solubility, curing, plastification

1. Khozin V.G. Strengthening of epoxy polymers. Kazan: PIK «Dom Pechati», 2004. 446 p. (in Russ.).

2. Epoxy Polymers. New Materials and Innovations, ed. by J.-P. Pascault and R.J.J. Williams. Wein-heim: Wiley-VCH, 2010. 390 p.

3. Petrie E.M. Epoxy Adhesive Formulations. New York, Chicago, San Francisco, Lisbon, London, Madrid, Mexico City, Milan, New Delhi, San Juan, Seoul, Singapore, Sydney, Toronto: McGraw-Hill, 2006. 530 p.

4. Zaitsev Ju.S., Kochergin Ju.S., Pakter M.K., Kucher R.V. Epoxy resins and adhesive compounds. Kiev: Naukova dumka, 1990. 200 p. (in Russ.).

5. Istomina T.S., Tiunova T.G., Borisova I.A., Oshhepkova T.E., Yakushev R.M. Vestnik Koncerna PVO «Almaz–Antej». 2015. № 1. P. 94–98. (in Russ.).

6. Li Ch., Liu M.-H., Liu Zh.-Y., Qing M.-L., Wang G. J. Thermal Analysis and Calorimetry. 2014. V.116. P. 411–416.

7. Vointseva I.I., Gembitskij P.A. Polyguanidines – disinfecting agents and multifunctional additives to composites. M.: LKM-press, 2009. 303 p. (in Russ.).

8. Kedik S.A. Mineral’nye i pit’evye vody (Mineral and Drinking Water). 2012-2013. № 2. P. 80–81. (in Russ.).

9. Svetlov D.A. Development of biostable composite materials with biocidal additives containing guanidine. Dis. ... PhD. Penza, 2008. 218 p. (in Russ.).

10. Startsev O.V., Mahonkov A.Ju., Molokov M.V., Erofeev V.T., Gudozhnikov S.S. Fundamentalnye Issledovaniya (Fundamental Research). 2014. № 5. P. 1177–1182. (in Russ.).

11. Zhavoronok E.S., Panov A.V., Chalykh A.E., Kolesnikova E.F. Plast. Massy (Plastics). 2009. № 6. P. 23–27. (in Russ.).

12. Kedik S.A., Bocharova O.A., Kha Kam An’, Panov A.V., Sedishev I.P., Zhavoronok E.S., Timofeeva G.I., Suslov V.V., Beksaev S.G. Pharm. Chem. J. 2010. V. 44. № 10. P. 568–573. (in Russ.).

13. Chalykh A.E., Zhavoronok E.S., Kolesnikova E.F., Kostina Yu.V., Bondarenko G.N. Polym. Sci. B., 2011. V. 53. № 7-8. P. 466–475. (in Russ).

14. Zhavoronok E.S., Chalykh A.E., Kolesnikova E.F., Kotomin S.V. Polym. Sci. B. 2013. V. 55. № 7-8. С. 484–489. (in Russ.).

15. Chernin I.Z., Smehov F.M., Zherdev Yu.V. The epoxy resin compositions]. М.: Khimiya Publ., 1982. 232 p. (in Russ.).

16. Wegmann A. Progr. Org. Coat. 1997. V. 32. P. 231–239.

17. Jackson M.L., Love B.J., Hebner S.R. J. Mater. Sci., Mater. Electronics. 1999. V. 10. P. 71–79.