The 13C T1s of side-CH3 group in PPU/PS, AB-crosslinked polymer were measured by using high resolution solid state NMR technique.

• 本文用固体高分辨NMR技术测量了AB-交联聚合物(即ABCP)PPU/PS(聚氨酯/聚苯乙烯)中侧甲基的~(13)C弛豫时间T_1。