Synthesis of Block Copolymers of Varying Architecture Through Suppression of Transesterification during Coordinated Anionic Ring Opening Polymerization

Table 5

Characteristics of copolymer PTMC-PLA-PTMC synthesised with and without protector (α-methylstyrene).

Protector	Mn (SEC), Da, Mn/Mw	PLA crystallinity (%) and (melting temperature (^°C))	Ratio L-lactide/trimethylencarbonate (% mol by ^1H NMR)	PLA segment length, monomer units
With	64150 (1,46)	33.5 (135.2)	45.7/54.3	11.5
Without	42030 (1,58)	—	31.1/68.9	2.6