Supporting Information
Sulfonated Poly(hexamethylene terephthalate) Copolyesters: Enhanced Thermal
and Mechanical Properties
Mayka Bautista, Antxon Martínez de Ilarduya, Abdelilah Alla, and Sebastián Muñoz-Guerra
Universitat Politècnica de Catalunya, Departament d´Enginyeria Química, ETSEIB, Diagonal 647,
Barcelona 08028, Spain
TABLE 1S Number-average sequence lengths and randomness of PHTxSIy copolyesters.a
Dyads
(mol%)
Number-Average
Sequence Lengths
Randomness
Copolyester
THT
THSI
SIHSI
nT
nSI
R
PHT95SI5
91.6
8.4
0
22,8
1.0
1.04
PHT90SI10
82.8
15.7
1.6
11.5
1.2
1.08
PHT80SI20
66.2
27.7
6.1
5.8
1.4
0.86
PHT70SI30
52.9
34.5
12.6
4.1
1.7
0.82
PHT60SI40
42.6
43.9
13.9
2.9
1.6
0.95
PHT50SI50
27.2
46.8
26.1
2.2
2.1
0.93
a
Experimental values were obtained by Lorentzian deconvolution of 13C NMR spectra in the region of oxymethylene peaks.
Number average sequence lengths and randomness were calculated using ref. 23.
TABLE 2S Powder X-ray diffraction data of PHT and PHTxSIy copolyesters.
d a (Å)
Copolyester
PHT
12.6 6.2
5.5
4.9
4.1
3.9
3.7
3.4
(m)
(s)
(m)
(w)
(s)
(vw) (vw) (vw) (vw) (vw) (vw)
12.5
5.5
4.9
4.3
4.1
3.7
(w)
(w)
(w)
(w)
(s)
(w)
(s)
PHT95SI5
PHT70SI30
(w)
3.3
3.2
3.0
2.7
2.6
4.3
(m)
a Bragg
spacings measured in powder diffraction patterns for samples coming from synthesis. Intensities visually estimated as follows:
m, medium; s, strong; w, weak; vw, very weak.
1
40
PHT60SI40
PHT70SI30
30
PHT80SI20
Tension (MPa)
PHT95SI5
PHT
PHT90SI10
20
10
0
0
50
100
150
200
250
300
350
400
450
500
550
600
Deformacion (%)
FIGURE 1S Stress-strain curves of PHT and PHTxSIy copolyesters with the indicated compositions.
2