Preparation and Properties of PTFE-PMMA Core-Shell Nanoparticles and Nanocomposites

Table 2

Size and composition data of the various samples.

Sample	% PTFE estimated (W/W)	% PTFE^(a) (DSC)	% PTFE^(b) (TGA)	𝑑 estimated (nm)	𝑑 PCS (nm)	𝑇𝑔 DSC^(c) (°C)
PMMA	0.0	0.0	0.0	—	391.3	121
BPM1	0.25	0.3	0.4	240	236.6	121
BPM2	0.5	0.4	0.4	191	194.4	121
BPM3	1.5	1.4	1.2	128	136.8	121
BPM4	3.0	3.1	3.4	101	112.0	121
BPM5	6.0	5.7	5.9	80	82.5	125
BPM6	12.0	12.0	15.4	63	68.5	134
BPM7	18.0	20.4	24.1	55	53.8	134
BPM8	30.0	22.8	28.8	45	48.0	131
BPM9	40.0	46.5	43.7	40	41.1	130
BPM10	50.0	53.0	48.1	37	38.4	128
BPM11	60.0	66.8	61.9	34	35.4	130
BPM12	70.0	70.3	67.2	31	31.8	Nd
BPM13	80.0	80.9	75.6	29	30.1	Nd
BPM14	85.0	84.5	86.5	29	29.4	Nd
BPM15	90.0	87.4	87.9	28	29.2	Nd

^(a)The PTFE percentage in the core-shell samples was estimated from the amount of feed PTFE and MMA assuming quantitative MMA conversion, absence of residual PTFE seeds, and no PMMA particle formation.
^(b)The amount of PTFE was estimated from the melting enthalpy of the PTFE component (endothermic peak at 325°C) considering that the melting enthalpy of the BP44 sample is 46.05 J g⁻¹ (first DSC heating curve).
^(c)First DSC heating curve at 20°/min.