SYNOPSISCopolymer systems based on various molar ratios of methyl methacrylate (MMA) /butyl acrylate (BA) and different mass content of N-methylolacrylamide (NMA) , as a crosslinking agent, were investigated. The influence of temperature, 150°C, under conditions similar to those used in the textile industry, and effect of ultraviolet (UV ) irradiation were examined. The changes of mechanical properties were found to be connected with the cross-linking and/or degradation mechanisms. The effect of copolymer composition on the mechanical properties was established, especially during UV degradation.
Thermal and photodegradation o f copolymer system based on styrene, butyl acrylate, acrylic acid and N-methylolacrylamide (S/BA/AA/MAA) shows mechanical, but n o structural changes in examined temperature range and after 320 h of UV irradiation (simultaneously with 256 and 36& nm lamps). Content of acrylic acid is a very important factor for the mechanical stability of these systems which can be very successfully used as the coatings in the practice. Found correlations indicate mechanism and factors having influence on the excellent stability of copolymer films.
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