000			01088nam a2200193Ia 4500
008			220216s9999 xx 000 0 und d
100			_aLake G J
245		0	_aMechanisms of antiozonant protection of elastomers
260			_bPolymer Degradation and Stability _c1995
300			_a193-203
500			_aSource Year: 1996
520			_aOzone cracking in elastomers can be characterized by two parameters : a threshold condition and a characteristic rate of growth. Many chemical additives can reduce growth rate but the most potent also effectively raise the threshold by forming a protective layer on the surface. Elastomers that have relatively high glass transition temperatures, and hence high internal viscosity (which retards diffusion), such as nitrile rubber or epoxidized natural rubber, are found to be more difficult to protect than lower glass transition materials, such as natural rubber or styrene-butadiene rubber.
650			_aAntiozonant protection
650			_aElastomers
650			_aOzone cracking
700			_aMente P G
856			_uIRRDB
942			_cJS
999			_c62785 _d62785