In FTIR spectrogram of scissored PVP or PNIPA, characteristic peak of C=S double bond were discovered.It is to say that the patch of RAFT agent on the hairy chains.

• 同时，通过水解后从微球表面“剪裁”下来的壳层高分子红外分析表明，高分子链段中均含有碳硫基团，即证明有RAFT试剂的“碎片”存在。