Thermal properties performance, long term

Comparisons of sulfur donor cures with peroxide cures in nitrile rubber are shown in Table 13.7. Each cure system is shown both with and without an antioxidant package. The peroxide cure is inherently more thermally stable than the sulfur donor cure, which provides less change in physical properties during long-term aging and better (lower) compression set. In each cure system, the inclusion of a good antioxidant package can further improve the heat and compression set performance. 

This paper touches on the chemistry of coal gasification and liquefaction comments on the current status of conversion processes and the influence of coal properties on coal performance in such processes and examines the contributions which coal conversion could make towards attainment of Canadian energy self-sufficiency. Particular attention is directed to a possible role for the medium-btu gas in long-term supply of fuel gas to residential and industrial consumers to linkages between partial conversion and thermal generation of electric energy and to coproduction of certain petrochemicals, fuel gas and liquid hydrocarbons by carbon monoxide hydrogenation. 

Polymeric materials used for electrical insulation have to exhibit not only good electrical properties, but also good mechanical properties and good appearance. In addition to reliable electrical performance, thermal stability is important, mainly for miniaturized electronic and electrical equipment. Long-term stability at temperatures in the range of 90-125°C (194-257°P) is... 

---