Synthesis of poly(styrene oxide) with different molecular weights using tin catalysts

Figures & data

Table 1. Data for PSO obtained from GPC measurements.

Catalyst	T (°C)	Time (h)	Mw	Mn	(Mw/Mn)	Conversion (%)
[(C8F15O2)4Sn2(O C4H9)2O]	60	24	1350; 560	1075; 560	1.3; 1.1	66; 30
[(C4H5O2)4Sn2(OC4H9)2O]	60	24	1560; 650	1280; 640	1.2; 1.0	38; 32
[(C4H5O2)4Sn2(OC4H9)2O]	80	24	1170; 560	990; 560	1.2; 1.0	40; 50
SnCl2	80	12	72,900; 3670	54,080; 2110	1.3; 1.7	55; 40
SnCl2/Me6Si2NH	80	24	137,980; 630	86,240; 590	1.6; 1.1	20; 75

Figure 1. ¹³C NMR spectrum of PSO prepared with SnCl₂ catalyst.

Figure 2. Gel permeation chromatogram of PSO prepared with SnCl₂/HMDS.

Scheme 1. Coordination of hexamethyldisilazane to tin(II) chloride.