Durability of rubber products: development of new antidegradants for long-term protection

Энсхеде, Twente University Press, 2003 - 207 с. The objective of the investigations presented in this thesis is to develop new long-lasting antidegradants and to gain a better insight in the protection mechanism of these products. A better understanding of the mechanism can help to pave the way for new developments, providing longer-term protection of rubber compounds. Longlasting antioxidants are expected to remain longer active in rubber compounds compared to conventional antioxidants, both during processing and service. Developments in this field are based on high molecular weight and polymer bound antioxidants. Long-lasting antiozonants are meant to migrate slower to the surface of rubber compounds compared to conventional antiozonants. Содержание: General introduction Durability of rubber compounds Synthesis and characterization of potential long-lasting antidegradants Development of test protocols for screening potential slow-migrating antidegradants Evaluation of slow release antidegradants in typical passenger and truck tire sidewall compounds Ozonolysis of model olefins - Efficiency of antiozonants Quinonediimine as bound antioxidant in silica compounds with the possibility to reduce the level of silane coupling agent Ranking of several antidegradants for their effectiveness to protect rubber against oxidation using differential scanning calorimetry and by accelerated aging of steelcord skim compounds The interaction of antidegradants with sulfur vulcanization agents Main symbols and abbreviations Summary Samenvatting