Table 4. Effect of Varying Equivalents of Trifluoroacetic Acid (TFA) to Tetramethylguanidine (TMG) in a Homoconjugate Catalyst Composition in Silanol Polycondensation.

entry	TFA:TMG	Mn (Da)	Mw (Da)	Đ	conversion (%)	D4 (ppm)
1	0.5:1	2900	5200	1.8	6	51
2	1:1	2800	5100	1.8	7	51
3	1.5:1	7100	12,100	1.7	63	69
4	2:1	23,200	44,800	1.9	89	95
5	2.5:1	35,600	69,400	1.9	93	105
6	3:1	59,000	116,400	2.0	96	132