تغير المقاومة النوعية للكاوتشوك (نايريت) المشوببنسب مختلفة من الغرافيت بتابعية تغير درجة الحرارة

A study of the compounds resulting from additional of graphite to rubben in accordance with the following rates: 1:0.05 – 1:0.15 – 1:0.25 – and 1:0.75, shows that if the increase of graphite ratio leads to change of the resistivity. Then, the influence of temperature on the properties of these compounds will not be similar but will follow the ratio of added graphite. As for the pure rubber we shall not encounter a great increase in the value of resistance till the values located within the range 10 when temperature decreases. With regards to the other ratios the resistance will change within the range of ( - ( Maximum. Besides the alteration takes an opposite shape standing from ratio 1:0,15 upwards. Moreover, determination was done for the values of activation energy change of these compounds when increasing the quality of graphite added to them, in addition to explanation of the behavior of resistance available when changing the temperature.