INFLUENCE OF 2,5-DIHYDROXY-2,5-DIMETHYLHEXYNE-3 ON THE THERMO-OXIDATING PROPERTIES OF LOW DENSITY POLYETHYLENE AND ITS COMPOSITE MATERIALS
The paper presents results of the study into the effect of 2,5-dihydroxy-2,5-dimethylhexyne on basic physicomechanical characteristics of compositions based on polyolefins and synthetic rubbers. As polyolefins there was used low density polyethylene, polypropylene, and as synthetic rubbers - nitrile - butadiene rubber, styrene - butadiene rubber, butyl rubber. It found that during the processing of LDPE and DDH compositions on rollers, a physicochemical and partially chemical interaction occurs between DDH and LDPE molecules which leds to an improvement in the physicomechanical, thermophysical parameters, as well as the rheological properties of the obtained materials. It revealed that the introduction of 2,5-dihydroxy-2,5-dimethylhexyne helped to increase the thermo - oxidative stability of composite materials. It I shown that in the presence of synthetic rubber, the compositions were more susceptible to thermo -oxidative aging.