The Influence of Chain Microstructure of Biodegradable Copolyesters Obtained with Low-Toxic Zirconium Initiator to In Vitro Biocompatibility

Table 1

Characteristics of copolymeric chain microstructure.

No	Kind of copolymer/molar ratio	𝑀𝑛 (kDa)	𝐷	𝑇𝑔 (°C)	The average length of the blocks	𝑅	TII	𝜃 [°]
1	poly(L-lactide-coglycolide) PLAGA/85 : 15	42.1	2.8	58	𝑙LL=11.12; 𝑙GG=2.02	0.43	0.1	72.9±2.6
2	poly(L-lactide-co-𝜀-caprolactone) (PLACL)/75 : 25	63.5	2.5	35	𝑙LL=4.29; 𝑙Cap=1.59	0.75	—	87.1±4.5
3	poly(L-lactide-cotrimethylene carbonate) (PLATMC)/72 : 28	36.0	2.0	42	𝑙LL=5.57; 𝑙T=2.13	0.56	4.16	76.8±0.9
4	poly(glycolide-co-𝜀-caprolactone) (PGACL)/8 : 92	40.0	2.0	−46	𝑙GG=1.1; 𝑙Cap=4.94	1.1	1.15	78.7±2.2
5	poly(L-lactide-coglycolide-co-𝜀-caprolactone) (PLACLGA)/66 : 24 : 10	50.0	1.9	29	𝑙LL=5.25; 𝑙GG=0.94; 𝑙Cap=5.9	—	0.02	79.1±1.4

𝑀_𝑛: number-average molecular mass.
𝐷: molecular weight distribution.
𝑇_𝑔: glass transition temperature.
𝑙_LL, 𝑙_Cap, 𝑙_GG, 𝑙_T: the average length of lactidyl, caproyl, glycolidyl, and carbonate sequences, respectively.
𝑅: randomization ratio.
T_II: transesterification of the second mode ratio.
𝜃: water contact angle.