Influence of Laurolactam Content on the Clay Intercalation of Polyamide 6,12/Clay Nanocomposites Synthesized by Open Ring Anionic Polymerization

Table 1

Fusion temperature (𝑇_𝑚) and enthalpy of fusion (Δ𝐻_𝑚) of the obtained homo- and copolymer compounds of CL and LL with NaMMT, using CLNa and CLMgBr.

Using CLNa as initiator	LL concentration (% mol)	𝑇𝑚 (°C)		Δ𝐻𝑚 (J/g)
PA6/NaMMT	0	219.3		42.2
PA6 : 12/NaMMT	20	197.2		35.1
	40	144.5		19.9
	60	135.0		22.1
	80	142.5		21.7
PA12/NaMMT	100	174.0		35.1
Using CLMgBr as initiator	LL concentration (% mol)	𝑇𝑚1(°C)	𝑇𝑚2(°C)	Δ𝐻𝑚1 (J/g)	Δ𝐻𝑚2 (J/g)
PA6/NaMMT	0	219.5	—	44.8	—
PA6 : 12/NaMMT	20	201.8	183.5	7.3	26.5
	40	175.2	154.3	4.1	15.8
	60	152.6	131.4	—	21.7
	80	149.9	145.6	11.3	21.2
PA12/NaMMT	100	—	172.3	—	31.5