| 초록 |
A series of [poly(L-lactide)–poly(dimer acid methyl ester-alt-poly(propylene glycol))–poly(L-lactide)]n (PLLA‒PDP‒PLLA)n multiblock copolymers was synthesized in a three-step procedure. The relationship between thermal behavior and morphology indicated microphase separation into two domains in both the triblock and multiblock materials. The multiblock architectures were found to have much lower TODT than previously reported triblock copolymers. To prepare (LDPL)n multiblocks, coupling low molar mass LDPL triblocks without free-standing thin films led to dramatically enhanced tensile properties. The self-adhesive performance of the pressure-sensitive adhesive system including the multiblocks was evaluated, showing a peel strength of 3.1 N cm‒1, probe tack of 1.9 N, and static shear strength of ＞50 000 min comparable to current PSAs. These biodiesel-based thermoplastic elastomers hold promise for sustainability and high value-added economy. |
