Table 1 Terpolymerization of TAz, PA, and epoxides using t-BuP₁ as a catalyst^a.

Entry	Epoxides	Time (h)	TAz conv.^b (%)	PA conv.^b (%)	M_n,theo^c (kg mol⁻¹)	M_n,NMR^b (kg mol⁻¹)	Ð^d
1^e	PO	24	—	—	—	—	—
2^f	PO	24	—	—	—	—	—
3^g	PO	1.5	99	33	10.5	11.2	1.05
4^g		21	99	94	21.9	23.6	1.04; 1.05^h
5ⁱ	PO	0.5	99	33	10.5	11.2	1.05
6ⁱ		4	99	99	22.8	24.2	1.03; 1.05^h
7	PO	0.16	99	33	10.5	11.2	1.03
8		5	99	99	22.8	24.8	1.03
9^j	PO	1	99	33	10.5	11.2	1.05
10^j		6	99	87	20.6	21.7	1.06
11	EO	0.25	99	33	10.5	11.2	1.03
12		2	99	80	18.7	19.7	1.05
13		3	99	99	22.0	24.0	1.08
14^k	EO	1.5	99	33	10.5	11.2	1.04
15^k		30	99	99	22.0	24.2	1.03
16	BO	0.5	99	33	10.5	11.2	1.03
17		5	99	99	23.6	25.1	1.04
18^l	PO	0.25	99	33	10.4	11.2	1.04
19^l		5	99	94	21.8	23.8	1.10
20^m	PO	0.25	99	33	18.3	19.6	1.02
21^m		3	99	99	30.5	32.0	1.03
22ⁿ	PO	0.25	99	33	10.5	11.2	1.03
23ⁿ		3	99	99	22.8	25.6	1.77
24^o	PO	0.25	99	33	10.5	11.2	1.06
25^o		4	99	99	22.8	24.8	1.25
26^p	PO	2	99	99	22.8	6.12	1.29
27^q	PO	7	99	99	22.8	7.78	1.38
28^r	PO	0.25	99	49	10.5	11.2	1.03
29^r		4	99	99	16.7	18.2	1.04
30^s	PO	0.25	99	24	10.5	11.2	1.03
31^s		8	99	99	28.9	30.0	1.02

^aThe terpolymerizations were performed at a ratio of [TAz]₀/[PA]₀/[BnN(H)Ts]₀/[t-BuP₁]₀ = 30/90/1/1 at 100 °C ([TAz]₀ = 1.0 M in epoxides).
^bDetermined by ¹H NMR.
^cCalculated as follows: (MW of I) + ([TAz]₀/[I]₀) × conv.(TAz) × (MW of TAz + MW of PA) + {([PA]₀/[I]₀) × conv.(PA) − ([TAz]₀/[I]₀) × conv.(TAz)} × (MW of epoxides + MW of PA).
^dDetermined by SEC at 35 °C in THF (1.0 mL min⁻¹) using PSt standards.
^eWithout catalysts ([TAz]₀ = 0.5 M in epoxides and THF).
^fWithout catalysts in bulk ([TAz]₀ = 1.0 M in epoxides).
^g[TAz]₀/[PA]₀/[BnN(H)Ts]₀/[t-BuP₁]₀ = 30/90/1/0.5 in epoxides and THF ([TAz]₀ = 0.5 M in epoxides and THF, the volume amount of epoxides is same as THF).
^hBimodal peaks.
ⁱ[TAz]₀/[PA]₀/[BnN(H)Ts]₀/[t-BuP₁]₀ = 30/90/1/0.5 ([TAz]₀ = 1.0 M in epoxides).
^j[TAz]₀/[PA]₀/[BnN(H)Ts]₀/[t-BuP₁]₀ = 30/90/1/1 ([TAz]₀ = 2.0 M in epoxides).
^kAt 60 °C.
^lInitiated by 1,4-benzenedimethanol.
^mInitiated by polyethylene glycol.
ⁿCatalyzed by t-BuP₄.
^oCatalyzed by t-BuP₂.
^pCatalyzed by DBU.
^qCatalyzed by TBD.
^r[TAz]₀/[PA]₀/[BnN(H)Ts]₀/[t-BuP₁]₀ = 30/60/1/1.
^s[TAz]0/[PA]0/[BnN(H)Ts]0/[t-BuP1]0 = 30/120/1/1.

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