Poly(ether ether sulfone amide)s as a new category of processable heat-resistant polymers

Figures & data

Figure 1. FT-IR spectra of poly(ether ether sulfone amide)s.

Table 1. Polymer characterization data.

Polymer	FT-IR (KBr) (ν, cm^−1)	Molecular formula	Elemental analysis (%)						Color	Yield (%)	ηInh (dL/g)
			Calculated			Found
			N	H	C	N	H	C
DA–TPC	3336–3350 (N–H stret.)	C44H30N2O8S	70.78	4.02	3.75	70.59	3.94	3.86	Brown	96	0.84
	3018 (Ar–H stret.)
	1662 (C=O stretching) 1522 (N–H bend, C–N stret.)
	1286 (SO2 asymm. stret.)
	1221 (C–O stretching)
	1146 (SO2 symm. stret.)
DA–IPC	3330–3343 (N–H stret.)	C44H30N2O8S	70.78	4.02	3.75	70.53	4.20	3.67	Yellow	98	0.78
	3016 (Ar–H stret.)
	1660 (C=O stretching) 1515 (N–H bend, C–N stret.)
	1282 (SO2 asymm. stret.)
	1223 (C–O stretching)
	1149 (SO2 symm. stret.)
DA–ADP	3331–3338 (N–H stret.)	C42H34N2O8S	69.42	4.68	3.86	69.31	4.55	3.97	Yellow	98	0.72
	3014 (Ar C–H stret.)
	2980,2936 (Aliph C–H stret)
	1656 (C=O stretching) 1505 (N–H bend, C–N stret.)
	1289 (SO2 asymm. stret.)
	1220 (C–O stretching)
	1141 (SO2 symm. stret.)

Table 2. Solubility of poly(ether ether sulfone amide)s.

Polymer	NMP	DMAc	DMSO	DMF	m-Cresol	THF	CH2Cl2	EtOH
TPC–DA	++	++	+	+	+	±	^_	–
IPC–DA	++	++	++	+	+	±	^_	–
ADP–DA	++	++	++	++	++	+	+	–

++: soluble at room temperature, +: soluble by heating.

±: partially soluble by heating, ^_: insoluble.

Table 3. Thermal properties of polyamides.

Polymer	Tg (°C)	TIDT (°C)	T5 (°C)	T10 (°C)	Rw (%)
TPC–DA	218	390	442	476	55
IPC–DA	200	375	435	466	53
ADP–DA	190	355	417	449	48

Notes: T_g: determined by DMTA, T_IDT: initial decomposition temperature, T₅, T₁₀: decomposition temperatures for 5 and 10% weight loss, respectively, R_w: residual weight retention at 700 °C.

Figure 2. TGA curve of poly(ether ether sulfone amide)s.

Figure 3. Stress-strain mechanical test of poly(ether ether sulfone amide)s.

Table 4. Mechanical properties of polyamides.

Polymer	Tensile strength (MPa)	Tensile modulus (GPa)	Elongation at break (%)
TPC–DA	79	1.43	22
IPC–DA	47	1.40	20
ADP–DA	32	1.32	19

Figure 4. X-ray graphs of poly(ether ether sulfone amide)s.

Scheme 1. Preparation of monomer and related poly(ether ether sulfone amide)s.