Table 2. ¹³C T ₁ relaxation times for solid various PCXCs at ambient temperature*.

Entry	PCXC structure	T1 (s)
		C=O	C	CH			CH2	CH3
				1	2	3
1	Amorphous	48	21	—	38	—	26	1.3
2	(S)-enantiopure	92	29	—	36	—	21	1.6
3	Multiblock	156	40	110	50	116	58	1.3
4	Stereocomplexed	223	42	165	—	150	81	1.6

^*Measured with CPMAS NMR using the saturation recovery-based sequence.