Table 1. Molecular Properties of PGBAT, PGBS, and PGBT Copolymers Synthesized on a 30 g Scale^a.

	polycondensation		feed	polymer
sample	temp/°C	time/h	nGA/mol %	nGA/mol %	B:A + T	Mn/g mol–1	Mw/g mol–1	Đ	yield/%
PGBAT21	210–230	4	25	21	1:0.99	26,300	50,600	1.92	98
PGBAT44	210–220	5	50	44	1:0.97	18,100	45,200	2.49	96
PGBAT86	210	4.5	90	86	1:1	21,700	46,700	2.15	78
PGBAT89	210	3.5	92	89	1:0.93	24,000	47,300	1.97	75
PGBAT92	210	3.5	94	92	1:0.98	24,500	47,300	1.93	74
PGBS91	210	3.5	90	91	1:0.93b	18,700	34,400	1.84	92
PGBT80	210	5	90	80	1:0.90	20,300	40,600	2.00	65

^aFor PGBAT21–44 feed, B:A + T = 1.25:1; for PGBAT86–92, PGBS91, and PGBT80 feed, B:A + T = 1.05:1.

^bB:S value.