Mean degradation temperature

Mean degradation temperature is the average of fractional decomposition temperatures over 0.1, weight fraction increments from 0.1-0.9, and heating rates 5°, 10°, 20°, 40°, and 80°C/min. 

Climate changes may also have significant effects on lake DOC concentrations. In a 20-year study of boreal lakes in the Experimental Lakes Area of northwestern Ontario, Schindler et al. (1997) reported that lake DOC concentrations declined by 15-25% as mean annual temperatures increased by 1.6°C, precipitation declined by 40%, and runoff declined by 70% due to increased evaporation and decreased precipitation. The primary reason for the decline in lake DOC was reduced inputs of DOC from terrestrial catchments, although in-lake removal of DOC also increased slightly via either increased acidification, UV light penetration, or microbial degradation. 

Much of the data compiled for soil degradation rates under field conditions has been taken from studies in the temperate zone. A useful comparison of soil degradation rates in the tropics has been provided by a study in Brazil carried out in the central western region, latitude 15°53 S where the mean annual temperature is 23°C. The dissipation of 10 different pesticides was monitored for 80 days under field conditions. The data was found to fit a biexponential decay model (r > 0.97) ... 

Physical degradation of implanted polymeric material is mainly due to the interaction of the materials by means of temperature, air, light and high energy radiation [21]. 

Increase in the thermal degradation temperature, which means a higher stability of the composite material. 

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