Where the degradation controlling agent is dispersed in the matrix material, {HEAD ~ the agent} represents between about 0.1% to {TAIL ~ about 40%} by weight of the matrix material 
Where the degradation controlling agent is dispersed in the matrix material , { HEAD ~ the agent } represents between about 0.1 % to { TAIL ~ about 40 % } by weight of the matrix material
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH