Light Resistance of Polypropylene and Propylene-Base Fiber

摘要

An investigation was made of the process of accelerated light aging of polypropylene and propylene base fibers and effective stabilizers were found for chemical and physico-mechanical properties of polypropylene fibers against the effect of ultraviolet radiation at higher temperature. It is shown, that the most effective stabilizers at photochemical destruction of polypropylene are: product 264-phosphite and product 26, in the presence of which at accelerated light (photo) aging there is practically total retention of the initial physico-mechanical properties of the fibers. It was established, that many stabilizers of thermooxidation destruction of polypropylene, such as for example, products 264, 264-phosphite etc. appear to be simultaneously inhibitors of photochemical reactions of polypropylene destruction. The phenomenon of combined effect of polypropylene stabilizers, which has been previously established on polyamides, allows an assumption about the possibility of creating polypropylene stabilizers with complex properties. An assumption was made, explaining the mechanism of simultaneous appearance in stabilizers of propylene fibers of inhibiting properties against thermooxidizing and light destruction of the polymer. (Author)