has no remarkable change with increasing concen-
tration. The decay of the CPMG signals only exhibited
a single-exponential mode, and then only a T2 com-
ponent could be obtained. PVC/THF samples should
be still a homogeneous solution without any larger
chain aggregation because of the stronger molecular
interaction. The slight decrease in Tl
2 value for PVC/
THF solutions is considered due to the chain entangle-
ment at higher concentrations. On the other hand, Tl
2
value decreases rapidly with increasing the concen-
tration in both PVC/MOR and PVC/DOA samples.