Poly(L-lactide)-Poly(ε-caprolactone) 세그먼트화 블록 공중합체의 합성과 특성분석
57권 3호, pp. 150-158,
6월 2020
10.12772/TSE.2020.57.150
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요약
In this study, a series of poly(L-lactide) (PLA)-poly(ε-caprolactone) (PCL) segmented
block copolymers were synthesized through three-step polymerization procedures.
The first step of the synthesis involved the ring-opening polymerization of ε-
caprolactone, initiated by poly(tetramethylene ether glycol), which resulted in the production
of HO-PCL-OH (PCL-diol). The synthesized PCL-diol acted as an initiator of the secondstep
product, i.e., PLA-PCL-PLA ABA-type tri-block copolymers. Finally, the PLA-PCL segmented
block copolymer was prepared by reacting PLA-PCL-PLA with hexamethylene
diisocyanate, a chain extender. The PLA-PCL segmented block copolymers were characterized
through nuclear magnetic resonance spectroscopy, Fourier-transform infrared spectroscopy,
gel permeation chromatography, differential scanning calorimetry, and universal
testing machine tests. The PLA-PCL segmented block copolymer showed a lower modulus
and a higher elongation at break than the PLA homopolymer without significant meltingpoint
depression.
통계
2022년 11월부터 누적 집계
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