Nature Communications

Table 1 Copolymerization of chloral/bromal with various cyclic anhydrides ^a

From: Chemically recyclable polyvinyl chloride-like plastics


entry	M1	M2	Cat.	T (°C)	t (h)	Conv. (%)^b	A₁:A_1’:A_1” ^c		AD (%)^d	M_n (kDa)^e	Đ ^e	T_g (°C) ^f
1	chloral	GA	Et₃N	25	0.25	>99		56:20:24	66	52.6	1.3	45
2	chloral	GA	InBr₃	25	47	83		96:4:0	98	79.1	1.5	31
3	chloral	GA	InBr₃	100	1	69		100:0:0	100	58.6	1.5	28
4	chloral	3-MGA	Et₃N	25	1.5	93		58:19:23	68	52.4	1.2	41
5	chloral	3-MGA	InBr₃	25	17	58		88:9:3	93	40.1	1.3	33
6	chloral	3-MGA	InBr₃	100	1.5	52		100:0:0	100	27.1	1.4	32
7	chloral	DGA	Et₃N	25	1	94		78:11:11	84	50.4	1.2	75
8	chloral	DGA	InBr₃	100	12	0		–	–	-–	–	–
9	chloral	2,2-DMGA	Et₃N	25	3	98		72:13:15	79	50.7	1.3	51
10	chloral	2,2-DMGA	InBr₃	25	26	74		88:7:5	92	26.2	1.4	42
11	chloral	CPDA	Et₃N	25	6	84		64:20:16	74	37.2	1.1	48
12	chloral	CPDA	InBr₃	25	119	68		100:0:0	100	13.1	1.5	42
13	chloral	CHDA	Et₃N	25	24	76		54:29:17	69	44.6	1.1	65
14	chloral	CHDA	InBr₃	25	215	30		100:0:0	100	13.7	1.4	48
15	chloral	DPA	Et₃N	60	48	86		100:0:0	100	20.2	1.4	148
16	chloral	DPA	TfOH	60	75	68		100:0:0	100	5.7	1.5	129
17	bromal	GA	Et₃N	25	48	0		–	–	–	–	–
18	bromal	GA	InBr₃	25	48	89		91:9:0	95	40.2	1.5	52
19	bromal	3-MGA	InBr₃	25	48	78		100:0:0	100	31.7	1.5	54
20	bromal	2,2-DMGA	InBr₃	25	120	87		100:0:0	100	29.0	1.5	50

^aThe copolymerization was performed in CH₂Cl₂, [chloral/bromal]₀ = 3.5 M, [chloral/bromal]₀:[cyclic anhydride]₀:[catalyst] = 100:100:1; ^bConversion of chloral/bromal, determined by ¹H NMR spectroscopy; ^cMolar ratio of different units in the obtained copolymers, determined by ¹H NMR spectroscopy; ^dAlternating degree of the obtained copolymers; ^eDetermined by GPC in THF, calibrated with polystyrene standards (Figures S61–S78); ^f Determined by differential scanning calorimetry (DSC).

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