TY  - BOOK
AU  - Goodchild I R
AU  - Pond T J
TI  - Effect of aerobic ageing at elevated temperatures on dynamic mechanical properties of certain natural rubber vulcanisates
PY  - 1997///
PB  - Journal of Natural Rubber Research
KW  - Aerobic ageing
KW  - Natural rubber vulcanisates
N2  - Dynamic modulus and damping properties have been determined over a range of temperatures from five different natural rubber vulcanisates aerobically aged at elevated temperatures for periods up to 150 days. Overall, aerobic ageing is found to increase the modulus but decrease the damping of the vulcanisates. The rate of change of properties caused by ageing, through initially relatively small, may increase after longer times if antioxidant material becomes depleted. Results at longer ageing times indicate the modulus may, depending upon the vulcanisates ingredients, pass through a maximum; however the modulus remains greater than for unaged material. Aerobic ageing is also shown to alter the glass transition temperature of a vulcanisate
ER  -