RESEARCH OF JOINT LONG-TIME IMPACTS OF TEMPERATURE AND HUMIDITY ON FIRE SAFETY OF GLASS REINFORCED POLYMERS

The most modern high-tech products are designed for long time service life. During the operation of the product it affect various climatic factors, resulting in properties of the used materials can vary significantly. These changes may relate to the fire hazard characteristics of materials, which in turn affects the fire safety products and survival of people in case of emergency related to the presence of fire. With the use of laboratory test methods to study the effect climate stability long-term (up to 90 days) the joint effects of factors of temperature and humidity on the change in the characteristics of fire danger on the glass-reinforced materials with polymer matrices of different chemical nature. Studies of the climate resilience are conducted on two modes: 1) simulation of the daily temperature and humidity in tropical climates; 2) exposure in chamber at increased temperature and humidity with the imposition of periodic thermal cycles (the impact of negative temperatures). The results obtained are compared with the characteristics of the starting materials and materials subjected to thermal aging only. It is shown that after prolonged exposure to the joint elevated temperature and humidity depending on the chemical nature of the polymer matrix the characteristics of flammability, heat release and smoke generation of the materials can significantly change. Depending of the polymer matrix the changes in the characteristics can take place as in smaller and bigger side