Department of diene polymer, sulfur cross-linked network of long-term use of rubber on the stability of the performance plays a crucial role. However, in order to further improve the double bonds at or near full capacity all the saturated HNBR (HNBR) of heat-resistant properties of the air. The choice of curing system has become really important. Sulfur may be given to sulfur, low sulfur yellow with heat-resistant properties of vulcanized HNBR superior to the ordinary high-sulfur curing systems. However, the curing peroxides system will enable the rubber applied to a high oxidation environment.
As we all know, rubber products at a high temperature of the effective life, by adding anti-degradation agent (such as zinc oxide and magnesium oxide such metal oxide), to be extended. We know that the cadmium oxide can provide good role in aging, but it was toxic because of their refusal to use the industrial sector. Therefore, in order to improve the rubber of the hot air aging properties of magnesium metal oxide usually become the first optional object. ,
Nevertheless, the hydrogenated nitrile rubber in the aging oxygen environment so that it will be a change in physical properties, with agents will continue to further cross-linking reaction, leading to the increase in the hardness and tensile strength and make the ultimate elongation at break lower. Rubber effective life is often based on the forecast to speed up its aging test results. Provided for under the conditions of aging, is scheduled to reach its performance target value of the absolute value of the properties or the time required for the determination of the predictable rubber life. In general, the standard used to determine elongation at break (Eb) to indicate, for example, 100% elongation at break or elongation of the original 50% to maintain the rate of close to the needs of the aging time.
As we all know, rubber products at a high temperature of the effective life, by adding anti-degradation agent (such as zinc oxide and magnesium oxide such metal oxide), to be extended. We know that the cadmium oxide can provide good role in aging, but it was toxic because of their refusal to use the industrial sector. Therefore, in order to improve the rubber of the hot air aging properties of magnesium metal oxide usually become the first optional object. ,
Nevertheless, the hydrogenated nitrile rubber in the aging oxygen environment so that it will be a change in physical properties, with agents will continue to further cross-linking reaction, leading to the increase in the hardness and tensile strength and make the ultimate elongation at break lower. Rubber effective life is often based on the forecast to speed up its aging test results. Provided for under the conditions of aging, is scheduled to reach its performance target value of the absolute value of the properties or the time required for the determination of the predictable rubber life. In general, the standard used to determine elongation at break (Eb) to indicate, for example, 100% elongation at break or elongation of the original 50% to maintain the rate of close to the needs of the aging time.
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