METHOD OF DETERMINATION OF THE DEGREE OF PHENOL- FORMALDEHYDE ADHESIVE CURING IN WOOD COMPOSITE MATERIALS

摘要

the invention u043eu0442u043du043eu0441u0438u0442u0441u00a0 to test technology, namely the ways of u043eu043fu0440u0435u0434u0435u043bu0435u043du0438u00a0 degree u043eu0442u0432u0435u0440u0436u0434u0435u043du0438u00a0 u043au043bu0435u00a0 on u0444u0435u043du043eu043bu0444u043eu0440u043cu0430u043bu044cu0434u0435u0433u0438u0434u043du043eu0439 basis in composite u0434u0440u0435u0432u0435u0441u043d building materials, door board, chipboard and u0434u0440u0435u0432u0435u0441u043du043eu0441u043bu043eu0438u0441u0442u044bu0445 u043fu043bu0430u0441u0442u0438u043au0430u0445. to improve the accuracy of u0438u0437u043eu0431u0440u0435u0442u0435u043du0438u00a0 u00a0u0432u043bu00a0u0435u0442u0441u00a0 u043eu043fu0440u0435u0434u0435u043bu0435u043du0438u00a0 degree u043eu0442u0432u0435u0440u0436u0434u0435u043du0438u00a0 u043au043bu0435u00a0 in composite wood material.select a sample of u044du043au0441u0442u0440u0430u0433u0438u0440u0443u044eu0442 glue wood, the water, u0441u043fu0435u043au0442u0440u043eu0444u043eu0442u043eu043cu0435u0442u0440u0438u0447u0435u0441u043au0438 u043eu043fu0440u0435u0434u0435u043bu00a0u044eu0442 optical density of water extract in u0434u043bu0438u043du0430u0445 waves 250, 287 and 302 nm, as an indirect characteristics of Hu043f u043eu0442u0432u0435u0440u0436u0434u0435u043du0438u00a0 use value, calculated by the formula Hu043f = A287 - 02884 (A25 - a32 motorways) where A287, A25, car dealer from optical u043fu043bu043eu0442u043du043eu0441 t extract respectively in 287, 250 and 302 nm;02884 rate established experimentally. the subsequent calculation of the degree of u043eu0442u0432u0435u0440u0436u0434u0435u043du0438u00a0 percentage u043fu0440u043eu0438u0437u0432u043eu0434u00a0u0442 on u043au0430u043bu0438u0431u0440u043eu0432u043eu0447u043du043eu043cu0443 schedule.